buffer: improve `Buffer.equals` performance #50621

kylo5aby · 2023-11-08T05:04:00Z

improve Buffer.equals performance:

                                                              confidence improvement accuracy (*)   (**)  (***)
buffers/buffer-equals.js n=1000000 difflen='false' size=0            ***    147.60 %       ±1.94% ±2.58% ±3.37%
buffers/buffer-equals.js n=1000000 difflen='false' size=16386        ***      5.47 %       ±2.92% ±3.93% ±5.22%
buffers/buffer-equals.js n=1000000 difflen='false' size=512          ***     34.73 %       ±0.85% ±1.13% ±1.48%
buffers/buffer-equals.js n=1000000 difflen='true' size=0             ***     82.37 %       ±3.70% ±4.98% ±6.60%
buffers/buffer-equals.js n=1000000 difflen='true' size=16386         ***     85.01 %       ±1.84% ±2.45% ±3.19%
buffers/buffer-equals.js n=1000000 difflen='true' size=512           ***     82.84 %       ±3.14% ±4.20% ±5.53%

As mentioned in #50620 , the performance regression of Buffer.byteLength might be due
to ArrayBufferView.byteLength, reduce the property access of Buffer.byteLength
helps to reduce regression for Buffer.equals

Inspired by the comment from @aduh95, using TypedArrayPrototypeGetByteLength
also improves performance.

Refs: #50620

nodejs-github-bot · 2023-11-08T05:24:48Z

CI: https://ci.nodejs.org/job/node-test-pull-request/55489/

aduh95 · 2023-11-08T09:09:56Z

lib/buffer.js

@@ -860,11 +860,11 @@ Buffer.prototype.equals = function equals(otherBuffer) {

  if (this === otherBuffer)
    return true;
-
-  if (this.byteLength !== otherBuffer.byteLength)
+  const len = this.byteLength;


Could you try with TypedArrayPrototypeGetByteLength from primordials? I'd be curious to see if that would improve perf further or not.

Good suggestion. I have tried TypedArrayPrototypeGetByteLength. As you can see in the updated benchmark result, it improved a lot.

lib/buffer.js

aduh95 · 2023-11-08T14:19:19Z

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1470/

Results

confidence improvement accuracy (*)    (**)   (***)
buffers/buffer-base64-decode-wrapped.js n=32 linesCount=524288 charsPerLine=76                                                                                 -0.20 %       ±0.58%  ±0.78%  ±1.01%
buffers/buffer-base64-decode.js size=8388608 n=32                                                                                                               0.07 %       ±0.86%  ±1.14%  ±1.49%
buffers/buffer-base64-encode.js n=32 len=67108864                                                                                                               0.37 %       ±1.20%  ±1.60%  ±2.08%
buffers/buffer-base64url-decode.js size=8388608 n=32                                                                                                            0.38 %       ±0.70%  ±0.93%  ±1.21%
buffers/buffer-base64url-encode.js n=32 len=67108864                                                                                                           -0.01 %       ±0.37%  ±0.49%  ±0.63%
buffers/buffer-bytelength-buffer.js n=4000000 len=16                                                                                                           -2.14 %      ±10.08% ±13.41% ±17.45%
buffers/buffer-bytelength-buffer.js n=4000000 len=2                                                                                                            -4.59 %       ±9.36% ±12.46% ±16.23%
buffers/buffer-bytelength-buffer.js n=4000000 len=256                                                                                                           0.17 %       ±9.88% ±13.15% ±17.12%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='four_bytes'                                                                     -1.73 %       ±4.99%  ±6.64%  ±8.64%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='one_byte'                                                                       -2.10 %       ±5.60%  ±7.45%  ±9.70%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='three_bytes'                                                             **     -7.48 %       ±4.93%  ±6.56%  ±8.54%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='two_bytes'                                                                       1.35 %       ±5.68%  ±7.55%  ±9.84%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='four_bytes'                                                                        0.62 %       ±3.03%  ±4.04%  ±5.25%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='one_byte'                                                                         -0.62 %       ±6.98%  ±9.28% ±12.08%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='three_bytes'                                                                       2.69 %       ±3.22%  ±4.29%  ±5.58%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='two_bytes'                                                                        -1.67 %       ±3.71%  ±4.93%  ±6.42%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='four_bytes'                                                                    -1.96 %       ±5.86%  ±7.80% ±10.15%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='one_byte'                                                                      -3.82 %       ±5.47%  ±7.29%  ±9.51%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='three_bytes'                                                             *      7.19 %       ±5.95%  ±7.91% ±10.30%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='two_bytes'                                                                     -2.75 %       ±5.12%  ±6.82%  ±8.88%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='four_bytes'                                                                       0.20 %       ±0.45%  ±0.60%  ±0.78%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='one_byte'                                                                        -1.87 %       ±3.41%  ±4.53%  ±5.90%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='three_bytes'                                                                      0.07 %       ±1.03%  ±1.38%  ±1.79%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='two_bytes'                                                                       -0.52 %       ±1.06%  ±1.41%  ±1.84%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='four_bytes'                                                               *     -6.65 %       ±5.36%  ±7.13%  ±9.29%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='one_byte'                                                                       -0.80 %       ±5.44%  ±7.23%  ±9.42%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='three_bytes'                                                                     1.69 %       ±5.29%  ±7.04%  ±9.16%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='two_bytes'                                                                      -5.04 %       ±5.74%  ±7.63%  ±9.94%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='four_bytes'                                                                        0.45 %       ±1.72%  ±2.29%  ±2.99%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='one_byte'                                                                         -0.14 %       ±5.19%  ±6.90%  ±8.99%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='three_bytes'                                                                       0.22 %       ±2.17%  ±2.89%  ±3.76%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='two_bytes'                                                                        -1.43 %       ±2.36%  ±3.14%  ±4.08%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='four_bytes'                                                                   -0.94 %       ±4.90%  ±6.52%  ±8.48%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='one_byte'                                                                     -1.18 %       ±5.77%  ±7.67%  ±9.99%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='three_bytes'                                                            *      6.35 %       ±5.43%  ±7.23%  ±9.42%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='two_bytes'                                                                    -3.87 %       ±5.42%  ±7.22%  ±9.42%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='four_bytes'                                                                     -0.00 %       ±0.06%  ±0.07%  ±0.10%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='one_byte'                                                                       -0.20 %       ±0.58%  ±0.77%  ±1.00%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='three_bytes'                                                                    -0.05 %       ±0.11%  ±0.14%  ±0.18%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='two_bytes'                                                                       0.04 %       ±0.11%  ±0.14%  ±0.19%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=16                                                                                             -2.09 %       ±9.56% ±12.72% ±16.55%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=16386                                                                                    *      2.93 %       ±2.81%  ±3.75%  ±4.90%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=4096                                                                                            3.38 %       ±7.61% ±10.13% ±13.19%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=512                                                                                      *    -12.01 %       ±9.62% ±12.80% ±16.67%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=16                                                                                              1.50 %       ±7.88% ±10.49% ±13.67%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=16386                                                                                           2.31 %       ±2.67%  ±3.55%  ±4.62%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=4096                                                                                     *     -6.47 %       ±6.43%  ±8.56% ±11.14%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=512                                                                                             9.74 %      ±10.71% ±14.25% ±18.55%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=16                                                                                              2.73 %      ±10.48% ±13.95% ±18.17%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=16386                                                                                    *      2.75 %       ±2.10%  ±2.79%  ±3.63%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=4096                                                                                            2.58 %       ±6.00%  ±7.98% ±10.39%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=512                                                                                            -0.53 %       ±8.88% ±11.82% ±15.38%
buffers/buffer-compare-offset.js n=1000000 size=16 method='offset'                                                                                              6.77 %      ±10.51% ±13.98% ±18.20%
buffers/buffer-compare-offset.js n=1000000 size=16 method='slice'                                                                                               0.98 %       ±4.27%  ±5.68%  ±7.40%
buffers/buffer-compare-offset.js n=1000000 size=16386 method='offset'                                                                                           1.28 %       ±9.47% ±12.60% ±16.40%
buffers/buffer-compare-offset.js n=1000000 size=16386 method='slice'                                                                                            0.51 %       ±3.64%  ±4.84%  ±6.30%
buffers/buffer-compare-offset.js n=1000000 size=4096 method='offset'                                                                                           -4.31 %       ±9.12% ±12.14% ±15.80%
buffers/buffer-compare-offset.js n=1000000 size=4096 method='slice'                                                                                            -0.91 %       ±3.26%  ±4.33%  ±5.64%
buffers/buffer-compare-offset.js n=1000000 size=512 method='offset'                                                                                            -2.52 %       ±9.88% ±13.15% ±17.12%
buffers/buffer-compare-offset.js n=1000000 size=512 method='slice'                                                                                              0.81 %       ±3.75%  ±5.00%  ±6.50%
buffers/buffer-compare.js n=1000000 size=16                                                                                                                     4.40 %       ±8.57% ±11.42% ±14.90%
buffers/buffer-compare.js n=1000000 size=16386                                                                                                           *      3.28 %       ±2.65%  ±3.53%  ±4.59%
buffers/buffer-compare.js n=1000000 size=4096                                                                                                                  -3.33 %       ±8.51% ±11.32% ±14.73%
buffers/buffer-compare.js n=1000000 size=512                                                                                                                   -3.93 %      ±10.07% ±13.40% ±17.45%
buffers/buffer-concat-fill.js n=800000 extraSize=1                                                                                                             -1.83 %       ±5.37%  ±7.15%  ±9.30%
buffers/buffer-concat-fill.js n=800000 extraSize=1024                                                                                                          -0.60 %       ±2.30%  ±3.07%  ±4.01%
buffers/buffer-concat-fill.js n=800000 extraSize=256                                                                                                           -0.08 %       ±3.58%  ±4.76%  ±6.21%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=1 pieces=16                                                                                       0.95 %       ±3.86%  ±5.14%  ±6.69%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=1 pieces=4                                                                                       -0.94 %       ±8.76% ±11.66% ±15.17%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=16 pieces=16                                                                                      0.52 %       ±3.11%  ±4.13%  ±5.38%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=16 pieces=4                                                                                      -1.57 %       ±7.98% ±10.63% ±13.84%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=256 pieces=16                                                                                    -0.17 %       ±1.25%  ±1.66%  ±2.16%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=256 pieces=4                                                                                      1.53 %       ±3.30%  ±4.39%  ±5.72%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=1 pieces=16                                                                                       2.03 %       ±2.98%  ±3.97%  ±5.17%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=1 pieces=4                                                                                       -1.02 %       ±8.85% ±11.77% ±15.33%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=16 pieces=16                                                                               *      4.52 %       ±3.85%  ±5.12%  ±6.66%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=16 pieces=4                                                                                       0.15 %       ±7.87% ±10.47% ±13.63%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=256 pieces=16                                                                                    -0.95 %       ±1.20%  ±1.60%  ±2.09%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=256 pieces=4                                                                                     -1.15 %       ±3.11%  ±4.14%  ±5.39%
buffers/buffer-copy.js n=6000000 partial='false' bytes=0                                                                                                       -1.95 %       ±9.07% ±12.07% ±15.71%
buffers/buffer-copy.js n=6000000 partial='true' bytes=128                                                                                                       0.53 %       ±1.78%  ±2.37%  ±3.08%
buffers/buffer-copy.js n=6000000 partial='true' bytes=32768                                                                                                    -1.62 %       ±3.18%  ±4.23%  ±5.50%
buffers/buffer-copy.js n=6000000 partial='true' bytes=8                                                                                                         0.05 %       ±2.02%  ±2.69%  ±3.50%
buffers/buffer-creation.js n=600000 len=10 type='fast-alloc-fill'                                                                                              -4.61 %       ±9.74% ±12.97% ±16.88%
buffers/buffer-creation.js n=600000 len=10 type='fast-alloc'                                                                                                   -2.35 %       ±6.29%  ±8.37% ±10.92%
buffers/buffer-creation.js n=600000 len=10 type='fast-allocUnsafe'                                                                                              3.85 %       ±6.95%  ±9.25% ±12.04%
buffers/buffer-creation.js n=600000 len=10 type='slow-allocUnsafe'                                                                                              7.14 %      ±10.02% ±13.34% ±17.36%
buffers/buffer-creation.js n=600000 len=1024 type='fast-alloc-fill'                                                                                            -0.62 %       ±1.41%  ±1.88%  ±2.45%
buffers/buffer-creation.js n=600000 len=1024 type='fast-alloc'                                                                                                 -1.10 %       ±1.93%  ±2.57%  ±3.35%
buffers/buffer-creation.js n=600000 len=1024 type='fast-allocUnsafe'                                                                                            1.84 %       ±5.43%  ±7.23%  ±9.41%
buffers/buffer-creation.js n=600000 len=1024 type='slow-allocUnsafe'                                                                                            1.35 %       ±2.04%  ±2.71%  ±3.53%
buffers/buffer-creation.js n=600000 len=4096 type='fast-alloc-fill'                                                                                             0.04 %       ±1.63%  ±2.17%  ±2.83%
buffers/buffer-creation.js n=600000 len=4096 type='fast-alloc'                                                                                                  0.51 %       ±1.36%  ±1.80%  ±2.35%
buffers/buffer-creation.js n=600000 len=4096 type='fast-allocUnsafe'                                                                                            0.33 %       ±2.17%  ±2.89%  ±3.76%
buffers/buffer-creation.js n=600000 len=4096 type='slow-allocUnsafe'                                                                                            0.20 %       ±1.60%  ±2.13%  ±2.77%
buffers/buffer-creation.js n=600000 len=8192 type='fast-alloc-fill'                                                                                            -0.38 %       ±1.77%  ±2.36%  ±3.07%
buffers/buffer-creation.js n=600000 len=8192 type='fast-alloc'                                                                                                  0.74 %       ±1.37%  ±1.82%  ±2.37%
buffers/buffer-creation.js n=600000 len=8192 type='fast-allocUnsafe'                                                                                     *     -1.47 %       ±1.36%  ±1.82%  ±2.38%
buffers/buffer-creation.js n=600000 len=8192 type='slow-allocUnsafe'                                                                                            0.70 %       ±1.85%  ±2.46%  ±3.20%
buffers/buffer-equals.js n=1000000 difflen='false' size=0                                                                                              ***    128.08 %      ±13.06% ±17.43% ±22.77%
buffers/buffer-equals.js n=1000000 difflen='false' size=16386                                                                                          ***     -9.56 %       ±3.14%  ±4.18%  ±5.44%
buffers/buffer-equals.js n=1000000 difflen='false' size=512                                                                                            ***     39.88 %      ±11.28% ±15.08% ±19.79%
buffers/buffer-equals.js n=1000000 difflen='true' size=0                                                                                               ***     72.04 %       ±9.32% ±12.41% ±16.16%
buffers/buffer-equals.js n=1000000 difflen='true' size=16386                                                                                           ***     60.21 %      ±12.47% ±16.61% ±21.66%
buffers/buffer-equals.js n=1000000 difflen='true' size=512                                                                                             ***     66.80 %       ±9.09% ±12.09% ±15.74%
buffers/buffer-fill.js n=20000 size=65536 type='fill("")'                                                                                                *     -2.32 %       ±2.14%  ±2.85%  ±3.72%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", "utf8")'                                                                                              1.43 %       ±3.60%  ±4.79%  ±6.24%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", 0, "utf8")'                                                                                           0.12 %       ±3.32%  ±4.41%  ±5.74%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", 0)'                                                                                                   0.77 %       ±3.57%  ±4.74%  ±6.18%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t")'                                                                                                     -2.50 %       ±3.82%  ±5.08%  ±6.63%
buffers/buffer-fill.js n=20000 size=65536 type='fill("test")'                                                                                                  -2.28 %       ±5.47%  ±7.28%  ±9.50%
buffers/buffer-fill.js n=20000 size=65536 type='fill(0)'                                                                                                        1.69 %       ±1.82%  ±2.43%  ±3.16%
buffers/buffer-fill.js n=20000 size=65536 type='fill(100)'                                                                                                     -2.03 %       ±3.97%  ±5.32%  ±7.00%
buffers/buffer-fill.js n=20000 size=65536 type='fill(400)'                                                                                                      1.09 %       ±4.85%  ±6.46%  ±8.43%
buffers/buffer-fill.js n=20000 size=65536 type='fill(Buffer.alloc(1), 0)'                                                                                      -0.03 %       ±4.10%  ±5.45%  ±7.10%
buffers/buffer-fill.js n=20000 size=8192 type='fill("")'                                                                                               ***     11.83 %       ±4.89%  ±6.50%  ±8.46%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", "utf8")'                                                                                               2.40 %       ±4.64%  ±6.17%  ±8.03%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", 0, "utf8")'                                                                                    **      8.13 %       ±5.01%  ±6.69%  ±8.76%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", 0)'                                                                                           ***     11.58 %       ±5.45%  ±7.25%  ±9.44%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t")'                                                                                              ***     10.82 %       ±5.06%  ±6.73%  ±8.76%
buffers/buffer-fill.js n=20000 size=8192 type='fill("test")'                                                                                                    3.84 %       ±6.36%  ±8.47% ±11.04%
buffers/buffer-fill.js n=20000 size=8192 type='fill(0)'                                                                                                ***     23.21 %       ±7.64% ±10.18% ±13.29%
buffers/buffer-fill.js n=20000 size=8192 type='fill(100)'                                                                                              ***     14.54 %       ±6.86%  ±9.15% ±11.95%
buffers/buffer-fill.js n=20000 size=8192 type='fill(400)'                                                                                              ***     19.85 %       ±7.32%  ±9.74% ±12.69%
buffers/buffer-fill.js n=20000 size=8192 type='fill(Buffer.alloc(1), 0)'                                                                                        3.14 %       ±4.19%  ±5.58%  ±7.26%
buffers/buffer-from.js n=800000 len=100 source='array'                                                                                                          0.24 %       ±7.16%  ±9.54% ±12.42%
buffers/buffer-from.js n=800000 len=100 source='arraybuffer-middle'                                                                                             2.53 %      ±11.05% ±14.70% ±19.13%
buffers/buffer-from.js n=800000 len=100 source='arraybuffer'                                                                                                   -6.11 %       ±9.11% ±12.13% ±15.80%
buffers/buffer-from.js n=800000 len=100 source='buffer'                                                                                                        -5.49 %       ±8.40% ±11.18% ±14.55%
buffers/buffer-from.js n=800000 len=100 source='object'                                                                                                        -1.04 %       ±9.86% ±13.12% ±17.07%
buffers/buffer-from.js n=800000 len=100 source='string-base64'                                                                                                  2.38 %       ±3.94%  ±5.24%  ±6.83%
buffers/buffer-from.js n=800000 len=100 source='string-utf8'                                                                                                    0.46 %       ±5.81%  ±7.73% ±10.06%
buffers/buffer-from.js n=800000 len=100 source='string'                                                                                                         2.26 %       ±5.50%  ±7.33%  ±9.54%
buffers/buffer-from.js n=800000 len=100 source='uint16array'                                                                                                    3.81 %       ±7.14%  ±9.51% ±12.37%
buffers/buffer-from.js n=800000 len=100 source='uint8array'                                                                                                    -1.99 %       ±8.41% ±11.19% ±14.56%
buffers/buffer-from.js n=800000 len=2048 source='array'                                                                                                  *      1.49 %       ±1.25%  ±1.67%  ±2.18%
buffers/buffer-from.js n=800000 len=2048 source='arraybuffer-middle'                                                                                           -7.81 %       ±9.98% ±13.29% ±17.30%
buffers/buffer-from.js n=800000 len=2048 source='arraybuffer'                                                                                                  -8.89 %      ±10.24% ±13.62% ±17.73%
buffers/buffer-from.js n=800000 len=2048 source='buffer'                                                                                                        0.90 %       ±1.69%  ±2.26%  ±2.94%
buffers/buffer-from.js n=800000 len=2048 source='object'                                                                                                       -1.47 %      ±10.25% ±13.64% ±17.75%
buffers/buffer-from.js n=800000 len=2048 source='string-base64'                                                                                                 0.82 %       ±1.52%  ±2.03%  ±2.65%
buffers/buffer-from.js n=800000 len=2048 source='string-utf8'                                                                                                   0.41 %       ±1.76%  ±2.35%  ±3.05%
buffers/buffer-from.js n=800000 len=2048 source='string'                                                                                                       -0.52 %       ±1.54%  ±2.06%  ±2.68%
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buffers/buffer-hex-encode.js n=1000000 len=1024                                                                                                                -0.60 %       ±1.57%  ±2.09%  ±2.73%
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buffers/buffer-swap.js n=1000000 len=8192 method='swap16' aligned='true'                                                                                        0.00 %       ±0.13%  ±0.18%  ±0.23%
buffers/buffer-swap.js n=1000000 len=8192 method='swap32' aligned='false'                                                                                      -0.07 %       ±0.10%  ±0.14%  ±0.18%
buffers/buffer-swap.js n=1000000 len=8192 method='swap32' aligned='true'                                                                                        0.02 %       ±0.11%  ±0.14%  ±0.19%
buffers/buffer-swap.js n=1000000 len=8192 method='swap64' aligned='false'                                                                                      -0.08 %       ±0.19%  ±0.25%  ±0.33%
buffers/buffer-swap.js n=1000000 len=8192 method='swap64' aligned='true'                                                                                        0.06 %       ±0.15%  ±0.20%  ±0.25%
buffers/buffer-tojson.js len=0 n=10000                                                                                                                         -1.18 %       ±3.56%  ±4.74%  ±6.17%
buffers/buffer-tojson.js len=256 n=10000                                                                                                                       -0.27 %       ±1.23%  ±1.64%  ±2.13%
buffers/buffer-tojson.js len=4096 n=10000                                                                                                                      -1.89 %       ±3.65%  ±4.90%  ±6.48%
buffers/buffer-tostring.js n=1000000 len=1 args=0 encoding=''                                                                                                   3.00 %       ±9.18% ±12.21% ±15.89%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='ascii'                                                                                             -0.38 %       ±5.88%  ±7.82% ±10.18%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='hex'                                                                                               -4.63 %       ±7.11%  ±9.47% ±12.34%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='latin1'                                                                                             3.73 %       ±8.24% ±10.96% ±14.27%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='UCS-2'                                                                                              1.40 %       ±6.60%  ±8.78% ±11.43%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='utf8'                                                                                              -3.15 %       ±9.08% ±12.09% ±15.73%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='ascii'                                                                                             -0.82 %       ±6.66%  ±8.86% ±11.53%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='hex'                                                                                                1.81 %       ±7.19%  ±9.56% ±12.45%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='latin1'                                                                                            -3.15 %       ±8.00% ±10.64% ±13.86%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='UCS-2'                                                                                              1.46 %       ±6.30%  ±8.38% ±10.91%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='utf8'                                                                                              -6.20 %       ±6.31%  ±8.41% ±10.96%
buffers/buffer-tostring.js n=1000000 len=1024 args=0 encoding=''                                                                                                3.80 %       ±4.59%  ±6.11%  ±7.95%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='ascii'                                                                                           0.60 %       ±3.82%  ±5.08%  ±6.61%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='hex'                                                                                             0.25 %       ±0.66%  ±0.87%  ±1.14%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='latin1'                                                                                         -1.69 %       ±3.66%  ±4.87%  ±6.34%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='UCS-2'                                                                                          -0.30 %       ±3.60%  ±4.79%  ±6.24%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='utf8'                                                                                           -0.71 %       ±3.69%  ±4.91%  ±6.39%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='ascii'                                                                                           2.53 %       ±3.86%  ±5.14%  ±6.70%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='hex'                                                                                             0.05 %       ±0.81%  ±1.07%  ±1.40%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='latin1'                                                                                         -0.63 %       ±3.50%  ±4.66%  ±6.07%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='UCS-2'                                                                                           2.74 %       ±3.89%  ±5.18%  ±6.75%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='utf8'                                                                                            0.38 %       ±3.74%  ±4.97%  ±6.48%
buffers/buffer-tostring.js n=1000000 len=64 args=0 encoding=''                                                                                                  7.62 %       ±9.62% ±12.81% ±16.67%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='ascii'                                                                                            -3.84 %       ±6.10%  ±8.12% ±10.58%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='hex'                                                                                              -0.21 %       ±4.13%  ±5.50%  ±7.16%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='latin1'                                                                                           -1.28 %       ±6.93%  ±9.21% ±11.99%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='UCS-2'                                                                                            -0.68 %       ±5.78%  ±7.70% ±10.02%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='utf8'                                                                                             -2.81 %       ±6.59%  ±8.77% ±11.41%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='ascii'                                                                                             1.32 %       ±7.00%  ±9.31% ±12.12%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='hex'                                                                                        *      3.99 %       ±3.95%  ±5.26%  ±6.85%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='latin1'                                                                                           -0.30 %       ±6.70%  ±8.92% ±11.62%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='UCS-2'                                                                                            -4.11 %       ±4.68%  ±6.25%  ±8.17%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='utf8'                                                                                              6.57 %       ±6.57%  ±8.76% ±11.43%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding=''                                                                                          -0.86 %       ±4.80%  ±6.40%  ±8.33%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='ascii'                                                                                     -1.24 %       ±3.65%  ±4.86%  ±6.33%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='hex'                                                                                       -0.58 %       ±1.18%  ±1.57%  ±2.04%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='latin1'                                                                                    -3.21 %       ±6.02%  ±8.01% ±10.42%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='utf16le'                                                                                   -1.28 %       ±5.61%  ±7.47%  ±9.72%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='utf8'                                                                                      -0.97 %       ±3.99%  ±5.31%  ±6.91%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding=''                                                                                    -0.76 %       ±5.53%  ±7.35%  ±9.57%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='ascii'                                                                                0.65 %       ±6.55%  ±8.72% ±11.34%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='hex'                                                                                  0.23 %       ±2.77%  ±3.68%  ±4.79%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='latin1'                                                                              -6.65 %       ±6.87%  ±9.15% ±11.91%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='utf16le'                                                                              3.79 %       ±6.24%  ±8.30% ±10.80%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='utf8'                                                                                 2.24 %       ±4.00%  ±5.33%  ±6.94%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding=''                                                                              2.53 %       ±4.39%  ±5.84%  ±7.60%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='ascii'                                                                        -5.97 %       ±6.59%  ±8.77% ±11.42%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='hex'                                                                    *      1.50 %       ±1.40%  ±1.87%  ±2.43%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='latin1'                                                                 *     -6.02 %       ±5.36%  ±7.13%  ±9.28%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='utf16le'                                                                       0.80 %       ±5.30%  ±7.05%  ±9.18%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='utf8'                                                                          1.70 %       ±2.66%  ±3.55%  ±4.63%
buffers/buffer-write.js n=1000000 type='BigInt64BE' buffer='fast'                                                                                               3.28 %       ±8.07% ±10.74% ±13.99%
buffers/buffer-write.js n=1000000 type='BigInt64LE' buffer='fast'                                                                                              -2.96 %       ±7.04%  ±9.37% ±12.20%
buffers/buffer-write.js n=1000000 type='BigUInt64BE' buffer='fast'                                                                                             -0.58 %       ±5.55%  ±7.40%  ±9.64%
buffers/buffer-write.js n=1000000 type='BigUInt64LE' buffer='fast'                                                                                             -0.37 %       ±5.11%  ±6.80%  ±8.86%
buffers/buffer-write.js n=1000000 type='DoubleBE' buffer='fast'                                                                                                 4.18 %       ±6.78%  ±9.04% ±11.81%
buffers/buffer-write.js n=1000000 type='DoubleLE' buffer='fast'                                                                                                -5.04 %       ±7.62% ±10.15% ±13.21%
buffers/buffer-write.js n=1000000 type='FloatBE' buffer='fast'                                                                                                  2.64 %       ±7.63% ±10.16% ±13.23%
buffers/buffer-write.js n=1000000 type='FloatLE' buffer='fast'                                                                                                 -3.47 %       ±8.13% ±10.82% ±14.08%
buffers/buffer-write.js n=1000000 type='Int16BE' buffer='fast'                                                                                                  3.74 %       ±8.60% ±11.45% ±14.90%
buffers/buffer-write.js n=1000000 type='Int16LE' buffer='fast'                                                                                                 -0.60 %       ±7.93% ±10.56% ±13.74%
buffers/buffer-write.js n=1000000 type='Int32BE' buffer='fast'                                                                                                  5.00 %       ±8.41% ±11.19% ±14.56%
buffers/buffer-write.js n=1000000 type='Int32LE' buffer='fast'                                                                                                 -4.70 %       ±7.65% ±10.18% ±13.25%
buffers/buffer-write.js n=1000000 type='Int8' buffer='fast'                                                                                                    -0.20 %       ±9.59% ±12.76% ±16.61%
buffers/buffer-write.js n=1000000 type='IntBE' buffer='fast'                                                                                                    9.04 %      ±15.33% ±20.41% ±26.59%
buffers/buffer-write.js n=1000000 type='IntLE' buffer='fast'                                                                                                   -8.14 %      ±10.82% ±14.41% ±18.78%
buffers/buffer-write.js n=1000000 type='UInt16BE' buffer='fast'                                                                                                 0.20 %       ±8.80% ±11.71% ±15.24%
buffers/buffer-write.js n=1000000 type='UInt16LE' buffer='fast'                                                                                          *     -8.94 %       ±7.96% ±10.59% ±13.78%
buffers/buffer-write.js n=1000000 type='UInt32BE' buffer='fast'                                                                                                -1.89 %       ±7.77% ±10.34% ±13.46%
buffers/buffer-write.js n=1000000 type='UInt32LE' buffer='fast'                                                                                                -5.75 %       ±8.03% ±10.69% ±13.91%
buffers/buffer-write.js n=1000000 type='UInt8' buffer='fast'                                                                                             *     -8.90 %       ±8.01% ±10.65% ±13.87%
buffers/buffer-write.js n=1000000 type='UIntBE' buffer='fast'                                                                                                   4.93 %       ±8.55% ±11.38% ±14.82%
buffers/buffer-write.js n=1000000 type='UIntLE' buffer='fast'                                                                                                   5.94 %       ±9.16% ±12.18% ±15.85%
buffers/buffer-zero.js type='buffer' n=1000000                                                                                                                 -1.04 %       ±3.46%  ±4.64%  ±6.11%
buffers/buffer-zero.js type='string' n=1000000                                                                                                                  1.64 %       ±4.26%  ±5.73%  ±7.60%
buffers/dataview-set.js n=1000000 type='Float32BE'                                                                                                              1.52 %       ±2.96%  ±3.96%  ±5.21%
buffers/dataview-set.js n=1000000 type='Float32LE'                                                                                                             -0.08 %       ±0.64%  ±0.85%  ±1.11%
buffers/dataview-set.js n=1000000 type='Float64BE'                                                                                                              0.21 %       ±0.90%  ±1.21%  ±1.59%
buffers/dataview-set.js n=1000000 type='Float64LE'                                                                                                              0.73 %       ±1.17%  ±1.57%  ±2.08%
buffers/dataview-set.js n=1000000 type='Int16BE'                                                                                                                0.18 %       ±1.17%  ±1.55%  ±2.03%
buffers/dataview-set.js n=1000000 type='Int16LE'                                                                                                                2.71 %       ±4.03%  ±5.41%  ±7.15%
buffers/dataview-set.js n=1000000 type='Int32BE'                                                                                                                2.20 %       ±2.71%  ±3.63%  ±4.79%
buffers/dataview-set.js n=1000000 type='Int32LE'                                                                                                                0.49 %       ±1.28%  ±1.71%  ±2.23%
buffers/dataview-set.js n=1000000 type='Int8'                                                                                                                   0.82 %       ±1.29%  ±1.72%  ±2.24%
buffers/dataview-set.js n=1000000 type='Uint16BE'                                                                                                              -0.03 %       ±1.09%  ±1.45%  ±1.89%
buffers/dataview-set.js n=1000000 type='Uint16LE'                                                                                                              -0.23 %       ±1.31%  ±1.75%  ±2.27%
buffers/dataview-set.js n=1000000 type='Uint32BE'                                                                                                              -0.97 %       ±3.14%  ±4.23%  ±5.61%
buffers/dataview-set.js n=1000000 type='Uint32LE'                                                                                                              -0.41 %       ±0.65%  ±0.87%  ±1.13%
buffers/dataview-set.js n=1000000 type='Uint8'                                                                                                                  0.34 %       ±1.10%  ±1.46%  ±1.91%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case, there are 388 comparisons, you can thus
expect the following amount of false-positive results:
  19.40 false positives, when considering a   5% risk acceptance (*, **, ***),
  3.88 false positives, when considering a   1% risk acceptance (**, ***),
  0.39 false positives, when considering a 0.1% risk acceptance (***)

nodejs-github-bot · 2023-11-09T05:04:40Z

CI: https://ci.nodejs.org/job/node-test-pull-request/55509/

nodejs-github-bot · 2023-11-09T19:04:52Z

CI: https://ci.nodejs.org/job/node-test-pull-request/55528/

nodejs-github-bot · 2023-11-10T08:30:57Z

CI: https://ci.nodejs.org/job/node-test-pull-request/55530/

nodejs-github-bot · 2023-11-10T09:45:16Z

Landed in 89c66ae

PR-URL: #50621 Refs: #50620 Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Debadree Chatterjee <[email protected]> Reviewed-By: Darshan Sen <[email protected]>

Improve performance of areSimilarFloatArrays by using primordial. Refs: nodejs#50621

Improve performance of areSimilarFloatArrays by using primordial. Refs: #50621 PR-URL: #51040 Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Vinícius Lourenço Claro Cardoso <[email protected]> Reviewed-By: James M Snell <[email protected]>

PR-URL: #50621 Refs: #50620 Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Debadree Chatterjee <[email protected]> Reviewed-By: Darshan Sen <[email protected]>

Improve performance of areSimilarFloatArrays by using primordial. Refs: #50621 PR-URL: #51040 Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Vinícius Lourenço Claro Cardoso <[email protected]> Reviewed-By: James M Snell <[email protected]>

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buffer: improve Buffer.equals performance

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util: improve performance of function areSimilarFloatArrays

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Improve performance of areSimilarFloatArrays by using primordial. Refs: nodejs#50621

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buffer: improve `Buffer.equals` performance #50621

buffer: improve `Buffer.equals` performance #50621

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buffer: improve `Buffer.equals` performance #50621

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