Alternative LAZ implementation. It supports compilation and usage in JavaScript, usage in database contexts such as pgpointcloud and Oracle Point Cloud, and it executes faster than the LASzip codebase.
The Emscripten/WebAssembly output for LASzip to JavaScript was unusably slow. The generated JavaScript code is not going to be a feasible solution to bring LASzip to all browsers. This project provides an alternative implementation that plays nice with Emscripten and provides a more rigorous software engineering approach to a LASzip implementation.
All tests were run on a 2013 Macbook Pro 2.6 Ghz Intel Core i7 16GB 1600 MHz DD3. Arithmetic encoder was run on a 4 field struct with two signed and two unsigned fields. Please see the benchmarks/brute.cpp for how these tests were run. The emscriten version used was Emscripten v1.14.0, fastcomp LLVM, JS host: Node v0.10.18
Count Comp Init Comp Time Comp Flush Decomp Init Decomp Time
1000 0.000001 0.000279 0.000000 0.000000 0.000297
10000 0.000000 0.001173 0.000000 0.000000 0.001512
100000 0.000000 0.009104 0.000000 0.000000 0.011168
1000000 0.000000 0.082419 0.000000 0.000000 0.108797
Count Comp Init Comp Time Comp Flush Decomp Init Decomp Time
1000 0.000586 0.014682 0.000273 0.000383 0.008012
10000 0.000022 0.017960 0.000009 0.000004 0.020219
100000 0.000030 0.128615 0.000008 0.000004 0.141459
1000000 0.000010 1.245053 0.000009 0.000005 1.396419
Count Comp Init Comp Time Comp Flush Decomp Init Decomp Time
1000 0.000005 0.001311 0.000006 0.000003 0.000820
10000 0.000003 0.007966 0.000004 0.000001 0.007299
100000 0.000001 0.062016 0.000003 0.000001 0.064037
1000000 0.000002 0.662454 0.000009 0.000003 0.673866
Count Comp Init Comp Time Comp Flush Decomp Init Decomp Time
1000 0.000751 0.012357 0.000424 0.000516 0.008413
10000 0.000016 0.006971 0.000016 0.000004 0.009481
100000 0.000008 0.059768 0.000009 0.000004 0.070253
1000000 0.000009 0.576017 0.000019 0.000005 0.658435