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Run results for:
char index vs charAt() vs slice() for the last character
Compare methods for testing string's last character.
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<iframe src="https://measurethat.net/Embed?id=588050" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:130.0) Gecko/20100101 Firefox/130.0
Browser:
Firefox 130
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
character index
104.6M/s
charAt()
99.7M/s
slice()
85.4M/s
View exact numbers
Test name
Executions per second
✓
character index
104,625,000 Ops/sec
charAt()
99,724,600 Ops/sec
slice()
85,370,144 Ops/sec
Script Preparation code:
var str = 'foo bar baz'; var noop = Function.prototype;
Tests:
character index
if (str[str.length-1] == 'z') noop();
charAt()
if (str.charAt(str.length-1) == 'z') noop();
slice()
if (str.slice(-1) == 'z') noop();