Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
Clone and append to beginning of array
Compare the new toSpliced() method, the slice() + unshift() method and the spread operator in cloning and appending an element to the beginning of an array.
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=534767" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0
Browser:
Firefox 128
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Array.prototype.toSpliced
18843596.0 Ops/sec
Array.prototype.slice + Array.prototype.unshift
15991052.0 Ops/sec
Spread operator
20711536.0 Ops/sec
Script Preparation code:
var array = ["hello", true, 7]; var newElement = "new";
Tests:
Array.prototype.toSpliced
const newArray = array.toSpliced(0, 0, newElement);
Array.prototype.slice + Array.prototype.unshift
const newArray = array.slice(); newArray.unshift(newElement);
Spread operator
const newArray = [newElement, ...array];