Run results for: Comparing 3 small hash types made in javascript

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_5_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/137.0.7151.79 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 137

Operating system: iOS 18.5.0

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
✓ adler32	11,101,294 Ops/sec
fletcher32	5,979,114 Ops/sec
crc32	165,351 Ops/sec

Tests:

crc32
function crc32(s) { for (var t = [], i = 0; i < 256; i++) { for (var c = i, j = 0; j < 8; j++) { c = c & 1 ? 0xEDB88320 ^ c >>> 1 : c >>> 1; } t[i] = c; } for (i = -1, c = -1; ++i < s.length;) { c = c >>> 8 ^ t[c & 255 ^ s.charCodeAt(i)]; } return ((c ^ -1) >>> 0).toString(16).toUpperCase(); } crc32(Date.now())
adler32
function adler32(string) { const MOD_ADLER = 65521; let a = 1, b = 0; for (let i = 0; i < string.length; i++) { a = (a + string.charCodeAt(i)) % MOD_ADLER; b = (b + a) % MOD_ADLER; } return (b << 16 | a).toString(16); } adler32(Date.now())
fletcher32
function fletcher32(data) { for (let i = sum1 = sum2 = 0; i < data.length; i++) { sum1 = (sum1 + data.charCodeAt(i)) % 65535; sum2 = (sum2 + sum1) % 65535; } return (sum2 << 16 | sum1).toString(16); } fletcher32(Date.now())

Run results for: Comparing 3 small hash types made in javascript

crc32

adler32

fletcher32