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=561423" 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/130.0.0.0 Safari/537.36
Browser:
Chrome 130
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
slice()
13.0M/s
substr()
13.0M/s
character index
13.0M/s
charAt()
13.0M/s
View exact numbers
Test name
Executions per second
✓
slice()
13,005,214 Ops/sec
substr()
12,989,911 Ops/sec
character index
12,988,157 Ops/sec
charAt()
12,969,210 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();