Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
Splice vs Spread vs Unshift to insert at beginning of array (fixed from slice)
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=531906" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 SberBrowser/16.0.2277.0
Browser:
Chrome 124
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Unshift
31K/s
Splice
20K/s
Spread
201/s
View exact numbers
Test name
Executions per second
✓
Unshift
30,835 Ops/sec
Splice
19,923 Ops/sec
Spread
201 Ops/sec
Script Preparation code:
var array = Array.from({ length: 100 }).map((val, i) => i);
Tests:
Splice
var newArray = array.splice(0, 0, 99);
Spread
var newArray = [99, ...array];
Unshift
var newArray = array.unshift(99);