Run results for: Round in javascript - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 119

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Or bitwise	1556118.0 Ops/sec
Double bitwise not	1585844.1 Ops/sec
Left bitwise shift	1593998.9 Ops/sec
Math.round	867188.5 Ops/sec

Script Preparation code:

var somenum = 7.3, rounded;

Tests:

Or bitwise
rounded = (0.5 + somenum) | 0;
Double bitwise not
rounded = ~~ (0.5 + somenum);
Left bitwise shift
rounded = (0.5 + somenum) << 0;
Math.round
rounded = Math.round(somenum);