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Run results for:
Round in javascript
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Or bitwise
20.6M/s
Double bitwise not
20.6M/s
Left bitwise shift
20.5M/s
Math.round
20.2M/s
View exact numbers
Test name
Executions per second
✓
Or bitwise
20,606,502 Ops/sec
Double bitwise not
20,581,444 Ops/sec
Left bitwise shift
20,534,340 Ops/sec
Math.round
20,211,148 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);