Thanks very much Pierre On Monday, March 17, 2014 10:31:28 AM UTC+2, PierreC wrote: > > Hello, > > > I have ported LZ4 compress(fast version) and uncompress functions to pure > Javascript. And they are pretty fast... I have added basic benchmarks and > they are faster than zlibs _but_ the compression ratio is not as good (1Mb > test file compressed into 420Kb instead of 250Kb for zlib): > > On Node v0.10.26, using lorem_1mb.txt as data: > LZ4: > > Input size: 1000205 > Output size: 433234 > lz4.encodeBlock native x 106 ops/sec ±0.41% (79 runs sampled) > lz4.decodeBlock native x 217 ops/sec ±0.16% (93 runs sampled) > lz4.encodeBlock JS x 9.84 ops/sec ±1.63% (29 runs sampled) > lz4.decodeBlock JS x 52.29 ops/sec ±0.56% (69 runs sampled) > > Zlib: > > Sample: lorem_1mb.txt (1000205 bytes raw / ~257018 bytes compressed) > > deflate-dankogai x 1.25 ops/sec ±0.52% (7 runs sampled) > > deflate-gildas x 1.13 ops/sec ±3.07% (6 runs sampled) > > deflate-imaya x 0.95 ops/sec ±5.06% (6 runs sampled) > > deflate-pako x 1.73 ops/sec ±0.96% (8 runs sampled) > > deflate-pako-untyped x 1.13 ops/sec ±2.28% (6 runs sampled) > > deflate-zlib x 3.67 ops/sec ±0.83% (22 runs sampled) > > inflate-dankogai x 5.66 ops/sec ±3.86% (19 runs sampled) > > inflate-imaya x 5.90 ops/sec ±2.65% (18 runs sampled) > > inflate-pako x 15.35 ops/sec ±3.79% (39 runs sampled) > > inflate-pako-untyped x 4.11 ops/sec ±6.32% (14 runs sampled) > > inflate-zlib x 35.55 ops/sec ±2.99% (81 runs sampled) > > > > The code is located at: > https://github.com/pierrec/node-lz4 > > When run in Node, it will use the native bindings. The JS port is in the > build/lz4.js or build/lz4.min.js files and useable in the browser. See the > README for usage. > > > Cheers, > > > Pierre > > > Thanks Vitaly, this looks great and I am looking forward to going through >> the code. >> >> Would you consider doing a JS port of LZ4 for use-cases where >> compression/decompression speed is more important than compression ratio? >> See http://code.google.com/p/lz4/ >> >
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