pako - zlib port to javascript, very fast!

Why pako is cool:

• Almost as fast in modern browsers as C implementation (see benchmarks)
• Works in browser
• Modular - you can browserify any separate component
• Both Sync & streamable interfaces (streamable is for big blobs)
• It's fresh - ports the latest zlib version (now 1.2.8)
• Tested - result is binary equal to zlib's one
• No restrictions - MIT licence

Benchmarks:

node v0.10, 10mb sample:

   deflate-gildas x 4.62 ops/sec ±1.93% (15 runs sampled)
   deflate-imaya x 3.82 ops/sec ±1.31% (13 runs sampled)
 ! deflate-pako x 9.09 ops/sec ±0.42% (26 runs sampled)
   deflate-zlib x 14.16 ops/sec ±3.33% (63 runs sampled)

node v0.11, 10mb sample:

   deflate-gildas x 5.10 ops/sec ±4.94% (16 runs sampled)
   deflate-imaya x 3.42 ops/sec ±4.11% (12 runs sampled)
 ! deflate-pako x 11.28 ops/sec ±0.42% (32 runs sampled)
   deflate-zlib x 14.17 ops/sec ±3.34% (64 runs sampled)

Install:

node.js:

npm install pako

browser:

bower install pako

Example & API

var pako = require('pako');

//
// Deflate
//

var input = new Uint8Array();
//... fill input data here
var output = pako.deflate(input);

//
// Inflate
//

var compressed = new Uint8Array();
//... fill data to uncompress here
var result = pako.inflate(compressed);
if (result.err) {
  console.log(result.err, result.msg);
}
var uncompressed = result.data;

See docs for full API specs.

Notes

Since pako was done mostly for browser, some specific functions were left unported.

deflate:

• writing custom gzip headers (default is ok)
• deflateSetDictionary, deflateParams, deflateSetHeader, deflateBound, deflatePending

inflate:

TBD

We will probably provide more modular design, to keep significant part of code reasonably small.

Authors

• Andrey Tupitsin @anrd83
• Vitaly Puzrin @puzrin

Personal thanks to Vyacheslav Egorov (@mraleph) for his awesome tutoruals about optimising JS code for v8, IRHydra tool and his advices.

License

MIT