Run results for: Round in javascript - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:107.0) Gecko/20100101 Firefox/107.0

Browser: Firefox 107

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Or bitwise	192843024.0 Ops/sec
Double bitwise not	195096160.0 Ops/sec
Left bitwise shift	191394544.0 Ops/sec
Math.round	194853008.0 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);