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JSON omit null #1535

Merged
merged 2 commits into from
Jul 30, 2021
Merged

JSON omit null #1535

merged 2 commits into from
Jul 30, 2021

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shanshin
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@shanshin shanshin commented Jun 7, 2021 •
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benchmarks

+1.75%	k.b.json.CitmBenchmark.decodeCitm
+0.49%	k.b.json.CitmBenchmark.encodeCitm
-0.82%	k.b.json.CoerceInputValuesBenchmark.testNonNullableCoercing
-0.65%	k.b.json.CoerceInputValuesBenchmark.testNonNullableRegular
-1.89%	k.b.json.CoerceInputValuesBenchmark.testNullableCoercing
+1.22%	k.b.json.CoerceInputValuesBenchmark.testNullableRegular
+1.67%	k.b.json.JacksonComparisonBenchmark.jacksonFromString
+1.76%	k.b.json.JacksonComparisonBenchmark.jacksonSmallToString
-0.71%	k.b.json.JacksonComparisonBenchmark.jacksonToString
+4.49%	k.b.json.JacksonComparisonBenchmark.jacksonToStringWithEscapes
+3.07%	k.b.json.JacksonComparisonBenchmark.kotlinFromString
+0.53%	k.b.json.JacksonComparisonBenchmark.kotlinSmallToString
+4.46%	k.b.json.JacksonComparisonBenchmark.kotlinToString
+2.43%	k.b.json.JacksonComparisonBenchmark.kotlinToStringWithEscapes
+4.89%	k.b.json.PrimitiveValuesBenchmark.decodeBoolean
+0.74%	k.b.json.PrimitiveValuesBenchmark.decodeInt
+6.29%	k.b.json.PrimitiveValuesBenchmark.decodeLong
+1.36%	k.b.json.TwitterBenchmark.decodeTwitter
-0.55%	k.b.json.TwitterBenchmark.encodeTwitter
+3.65%	k.b.json.TwitterFeedBenchmark.decodeMicroTwitter
-1.54%	k.b.json.TwitterFeedBenchmark.decodeMicroTwitterNoAltNames
-0.52%	k.b.json.TwitterFeedBenchmark.decodeTwitter
-1.24%	k.b.json.TwitterFeedBenchmark.decodeTwitterNoAltNames
+1.30%	k.b.json.TwitterFeedBenchmark.encodeTwitter
+15.57%	k.b.protobuf.ProtoBaseline.fromBytes
-4.58%	k.b.protobuf.ProtoBaseline.fromBytesExplicit
+3.49%	k.b.protobuf.ProtoBaseline.toBytes
+3.03%	k.b.protobuf.ProtoBaseline.toBytesExplicit
-0.50%	k.b.protobuf.ProtoHuge.fromBytes130
-1.64%	k.b.protobuf.ProtoHuge.toBytes130
+1.51%	k.b.protobuf.ProtoListBenchmark.fromBytes
-3.79%	k.b.protobuf.ProtoListBenchmark.toBytes
-0.39%	k.b.protobuf.ProtoListLikeBenchmark.fromBytes
+1.45%	k.b.protobuf.ProtoListLikeBenchmark.toBytes

Using omitNull = true flag for JSON's with all fields filled can sometimes slow down performance and increase volatility:

  • TwitterBenchmark.decodeTwitterOmitNull vs TwitterBenchmark.decodeTwitter: -5% .. +1.5%
  • OmitNullBenchmark.decodeNoNullsWithOmit vs OmitNullBenchmark.decodeNoNulls: -4.5% .. -3%
  • OmitNullBenchmark.decodeNullsWithOmit vs OmitNullBenchmark.decodeNulls: -4.7% .. -1%

qwwdfsad
qwwdfsad requested changes Jun 15, 2021
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core/commonMain/src/kotlinx/serialization/internal/ElementMarker.kt Outdated Show resolved Hide resolved
core/commonMain/src/kotlinx/serialization/internal/ElementMarker.kt Show resolved Hide resolved
formats/json/commonMain/src/kotlinx/serialization/json/internal/JsonAbsenceReader.kt Outdated Show resolved Hide resolved
core/commonMain/src/kotlinx/serialization/internal/ElementMarker.kt Outdated Show resolved Hide resolved
core/commonMain/src/kotlinx/serialization/internal/ElementMarker.kt Outdated Show resolved Hide resolved
core/commonMain/src/kotlinx/serialization/internal/ElementMarker.kt Outdated Show resolved Hide resolved
core/commonMain/src/kotlinx/serialization/internal/ElementMarker.kt Outdated Show resolved Hide resolved
@sandwwraith sandwwraith mentioned this pull request Jun 25, 2021
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sandwwraith
sandwwraith reviewed Jun 25, 2021
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benchmark/src/jmh/kotlin/kotlinx/benchmarks/json/ImplicitNullsBenchmark.kt Outdated Show resolved Hide resolved
benchmark/src/jmh/kotlin/kotlinx/benchmarks/json/TwitterBenchmark.kt Show resolved Hide resolved
core/commonMain/src/kotlinx/serialization/internal/ElementMarker.kt Outdated Show resolved Hide resolved
formats/json/commonMain/src/kotlinx/serialization/json/Json.kt Outdated Show resolved Hide resolved
formats/json/commonMain/src/kotlinx/serialization/json/Json.kt Outdated Show resolved Hide resolved
formats/json/commonMain/src/kotlinx/serialization/json/Json.kt Outdated Show resolved Hide resolved
formats/json/commonMain/src/kotlinx/serialization/json/Json.kt Outdated Show resolved Hide resolved
formats/json/commonTest/src/kotlinx/serialization/json/JsonImplicitNullsTest.kt Show resolved Hide resolved
formats/json/jsMain/src/kotlinx/serialization/json/internal/DynamicDecoders.kt Show resolved Hide resolved
formats/json/jsTest/src/kotlinx/serialization/json/JsonDynamicImplicitNullsTest.kt Show resolved Hide resolved
@shanshin shanshin force-pushed the json-omit-null-195 branch 2 times, most recently from aefa167 to 6867a38 Compare July 15, 2021 10:28
@qwwdfsad qwwdfsad mentioned this pull request Jul 29, 2021
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qwwdfsad
qwwdfsad approved these changes Jul 29, 2021
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Great work!

Also filed #1619 for release 1.3

@shanshin shanshin merged commit 2048fac into dev Jul 30, 2021
@shanshin shanshin deleted the json-omit-null-195 branch July 30, 2021 12:49
@shanshin shanshin mentioned this pull request Aug 31, 2021
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@sandwwraith sandwwraith sandwwraith approved these changes

@qwwdfsad qwwdfsad qwwdfsad approved these changes

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@shanshin @qwwdfsad @sandwwraith