Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
char index vs charAt() vs slice() vs at()
Compare methods for testing string's beginning character.
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=523913" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:125.0) Gecko/20100101 Firefox/125.0
Browser:
Firefox 125
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
2 years ago
at()
60.5M/s
slice()
59.8M/s
charAt()
57.0M/s
character index
50.2M/s
View exact numbers
Test name
Executions per second
✓
at()
60,477,916 Ops/sec
slice()
59,795,572 Ops/sec
charAt()
56,952,396 Ops/sec
character index
50,201,444 Ops/sec
Script Preparation code:
var str = 'foo bar baz'; var noop = Function.prototype;
Tests:
character index
if (str[0] === 'f') noop();
charAt()
if (str.charAt(0) === 'f') noop();
slice()
if (str.slice(0, 1) === 'f') noop();
at()
if (str.at(0) === 'f') noop();