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Run results for:
clearing array via pop() vs shift() vs .length = 0 vs = []
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
Browser:
Chrome 121
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
shift
28.2M/s
pop
27.9M/s
.splice(0)
22.6M/s
reassignment
20.2M/s
length
18.9M/s
View exact numbers
Test name
Executions per second
✓
shift
28,158,438 Ops/sec
pop
27,948,296 Ops/sec
.splice(0)
22,598,538 Ops/sec
reassignment
20,188,106 Ops/sec
length
18,930,202 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);