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Run results for:
Round in javascript
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=608063" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser:
Chrome 137
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Left bitwise shift
17.0M/s
Math.round
17.0M/s
Or bitwise
17.0M/s
Double bitwise not
16.9M/s
View exact numbers
Test name
Executions per second
✓
Left bitwise shift
17,003,502 Ops/sec
Math.round
16,985,250 Ops/sec
Or bitwise
16,956,066 Ops/sec
Double bitwise not
16,939,352 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);