Run results for: Math.log2 vs division for power of two vs multiple of x vs max32

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 138

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Math.log2

59.7M/s

Division

58.8M/s

View exact numbers

Test name	Executions per second
✓ Math.log2	59,734,192 Ops/sec
Division	58,843,988 Ops/sec

Tests:

Division
return 4294967295 / 65536 >>> 0;
Math.log2
return 4294967295 >>> (32 - Math.log2(65536));
Multiple of x
const kelipatan = 65536 * (2_097_152 / 65536 >>> 0); const urutanAcak = 4294967295 >>> 11; const reject = urutanAcak >= kelipatan; return urutanAcak % 65536;
Max32
return 4294967295 * 65536 / 4294967296 >>> 0;