Run results for: CompressionStream

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
compress a	981.7 Ops/sec
compress b	6891.9 Ops/sec

Script Preparation code:

  const enc = new TextEncoder();
  const dec = new TextDecoder();

  const a = new Uint8Array([...Array(1000000).keys()]);
  const b = enc.encode('The quick brown fox jumps over the lazy dog');

  // Сжатие через CompressionStream
  function compress(input) {
    const cs = new CompressionStream("deflate");
    const stream = new Blob([input]).stream().pipeThrough(cs);
    return new Response(stream).arrayBuffer().then(buf => new Uint8Array(buf));
  }

  // Распаковка через DecompressionStream
  function decompress(input) {
    const ds = new DecompressionStream("deflate");
    const stream = new Blob([input]).stream().pipeThrough(ds);
    return new Response(stream).arrayBuffer().then(buf => new Uint8Array(buf));
  }

Tests:

compress a
compress(a).then(ca => { console.log("Compressed A (length):", ca.length); decompress(ca).then(ua => { const equal = ua.length === a.length && ua.every((v, i) => v === a[i]); console.log("Decompressed A equals original:", equal); }); });
compress b
compress(b).then(cb => { console.log("Compressed B (length):", cb.length); decompress(cb).then(ub => { console.log("Decompressed B:", dec.decode(ub)); }); });

Run results for: CompressionStream

compress a

compress b