Run results for: Round in javascript - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.80 Safari/537.36 Edg/86.0.622.43

Browser: Chrome 86

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Or bitwise	2822970.0 Ops/sec
Double bitwise not	2842649.5 Ops/sec
Left bitwise shift	2845248.8 Ops/sec
Math.round	1606957.1 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);