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 v0.11, 10mb sample:

   deflate-gildas x 2.82 ops/sec ±1.21% (11 runs sampled)
   deflate-imaya x 2.25 ops/sec ±0.59% (9 runs sampled)
 ! deflate-pako x 6.09 ops/sec ±0.98% (19 runs sampled)
   deflate-zlib x 9.13 ops/sec ±0.92% (46 runs sampled)

node v0.11, 10mb sample:

   deflate-gildas x 3.39 ops/sec ±6.58% (12 runs sampled)
   deflate-imaya x 2.14 ops/sec ±4.29% (9 runs sampled)
 ! deflate-pako x 6.61 ops/sec ±0.66% (20 runs sampled)
   deflate-zlib x 9.28 ops/sec ±1.98% (47 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