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Run results for:
Last item in array slice/0 vs length - 1 vs slice/pop vs slice/shift
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=578147" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0
Browser:
Firefox 133
Operating system:
Ubuntu
Device Platform:
Desktop
Date tested:
one year ago
length - 1
632K/s
slice/pop
17K/s
slice/0
17K/s
slice/shift
13K/s
View exact numbers
Test name
Executions per second
✓
length - 1
632,308 Ops/sec
slice/pop
16,865 Ops/sec
slice/0
16,502 Ops/sec
slice/shift
13,331 Ops/sec
Script Preparation code:
var arr = []; for (let i = 0; i < 1000000; i++) { arr.push(i); }
Tests:
slice/0
for (let i = 0; i < 1000; i++) { const v = arr.slice(-1)[0]; }
length - 1
for (let i = 0; i < 1000; i++) { const v = arr[arr.length - 1]; }
slice/pop
for (let i = 0; i < 1000; i++) { const v = arr.slice(-1).pop(); }
slice/shift
for (let i = 0; i < 1000; i++) { const v = arr.slice(-1).shift(); }