Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
Run results for:
char index vs charAt() vs slice() vs substr()
Compare methods for testing string's beggining character.
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=583579" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0
Browser:
Firefox 134
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
character index
103.3M/s
substr()
100.7M/s
charAt()
100.0M/s
slice()
99.8M/s
View exact numbers
Test name
Executions per second
✓
character index
103,344,000 Ops/sec
substr()
100,681,736 Ops/sec
charAt()
100,044,696 Ops/sec
slice()
99,789,032 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();
substr()
if (str.substr(0, 1) == 'f') noop();