Run results for: zlib compatible compression libraries comparison - pako vs fflate

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

unzip pako b

57K/s

zip fflate b

23K/s

zip pako b

8K/s

unzip fflate b

8K/s

unzip fflate a

353/s

unzip pako a

240/s

zip pako a

74/s

zip fflate a

72/s

View exact numbers

Test name	Executions per second
✓ unzip pako b	56,912 Ops/sec
zip fflate b	22,838 Ops/sec
zip pako b	8,456 Ops/sec
unzip fflate b	8,285 Ops/sec
unzip fflate a	353 Ops/sec
unzip pako a	240 Ops/sec
zip pako a	74 Ops/sec
zip fflate a	72 Ops/sec

HTML Preparation code:

<script src="https://unpkg.com/fflate"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pako/2.1.0/pako.es5.min.js"></script>

Script Preparation code:

const enc = new TextEncoder();
var a = new Uint8Array([...Array(1000000).keys()]);
var b = enc.encode('The quick brown fox jumps over the lazy dog')
var ca = pako.deflate(a)
var cb = pako.deflate(b)

Tests:

zip pako a
pako.deflate(a)
zip fflate a
fflate.zlibSync(a)
zip pako b
pako.deflate(b)
zip fflate b
fflate.zlibSync(b)
unzip pako a
pako.inflate(ca);
unzip fflate a
fflate.unzlibSync(ca);
unzip pako b
pako.inflate(cb)
unzip fflate b
fflate.unzlibSync(cb)