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Run results for:
pop() vs shift() vs unshift vs pop vs index
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<iframe src="https://measurethat.net/Embed?id=487857" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:95.0) Gecko/20100101 Firefox/95.0
Browser:
Firefox 95
Operating system:
Fedora
Device Platform:
Desktop
Date tested:
2 years ago
shift
382.1M/s
pop
78.0M/s
index
387/s
push
373/s
unshift
46/s
View exact numbers
Test name
Executions per second
✓
shift
382,079,296 Ops/sec
pop
78,021,936 Ops/sec
index
387 Ops/sec
push
373 Ops/sec
unshift
46 Ops/sec
Script Preparation code:
var array = new Array(100000); for(let i = 0; i < 100000; ++i) { array[i] = i; }
Tests:
pop
while (array.length > 0) { array.pop(); }
shift
while (array.length > 0) { array.shift(); }
unshift
let a = []; for(let i = 0; i < 100000; ++i) { a.unshift(i); }
push
let a = []; for(let i = 0; i < 100000; ++i) { a.push(i); }
index
let a = new Array(100000); for(let i = 0; i < 100000; ++i) { a[i] = i; }