Run results for: Math.round vs Bitwise

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.3.1

Device Platform: Mobile

Date tested: one year ago

Math.round(n)

535.6M/s

Bitwise n + (n < 0 ? -0.5 : 0.5)>>0

489.9M/s

View exact numbers

Test name	Executions per second
✓ Math.round(n)	535,646,272 Ops/sec
Bitwise n + (n < 0 ? -0.5 : 0.5)>>0	489,942,784 Ops/sec

Script Preparation code:

var n = Math.PI

Tests: