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Run results for:
clearing array via pop() vs shift() vs .length = 0 vs = []
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<iframe src="https://measurethat.net/Embed?id=556243" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:130.0) Gecko/20100101 Firefox/130.0
Browser:
Firefox 130
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
pop
294933248.0 Ops/sec
shift
1245452672.0 Ops/sec
length
81949008.0 Ops/sec
reassignment
207896912.0 Ops/sec
.splice(0)
50386980.0 Ops/sec
Script Preparation code:
var array = []; for(var i = 0; i < 100000; i++){array.push(Math.random());}
Tests:
pop
while (array.length > 0) { array.pop(); }
shift
while (array.length > 0) { array.shift(); }
length
array.length = 0
reassignment
array = []
.splice(0)
array.splice(0);