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Run results for:
char index vs charAt() vs slice() vs charCodeAt()
Compare methods for testing string's character.
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=581588" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:134.0) Gecko/20100101 Firefox/134.0
Browser:
Firefox 134
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
character index
141616064.0 Ops/sec
charAt()
134871312.0 Ops/sec
slice()
120080832.0 Ops/sec
charCodeAt()
134922864.0 Ops/sec
Script Preparation code:
var str = 'foo bar baz'; var noop = Function.prototype;
Tests:
character index
if (str[4] == 'b') noop();
charAt()
if (str.charAt(4) == 'b') noop();
slice()
if (str.slice(4, 5) == 'b') noop();
charCodeAt()
if (str.charCodeAt(4) == 98) noop();