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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/125.0.0.0 Safari/537.36 Edg/125.0.0.0
Browser:
Chrome 125
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
shift
15.9M/s
pop
15.7M/s
.splice(0)
12.6M/s
reassignment
12.1M/s
length
10.1M/s
View exact numbers
Test name
Executions per second
✓
shift
15,913,283 Ops/sec
pop
15,747,752 Ops/sec
.splice(0)
12,588,362 Ops/sec
reassignment
12,113,191 Ops/sec
length
10,104,974 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);