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Run results for:
array[array.length - 1] vs array.at(-1) v2
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<iframe src="https://measurethat.net/Embed?id=590198" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36
Browser:
Chrome 133
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
array[array.length - 1]
131060624.0 Ops/sec
array.at(-1)
37834628.0 Ops/sec
array[array.length - 1] fn
134701488.0 Ops/sec
array.at(-1) fn
38496756.0 Ops/sec
Script Preparation code:
var array = [1, 2, 3]; function last1(array) { return array[array.length - 1] } function last2(array) { return array.at(-1) }
Tests:
array[array.length - 1]
var d = array[array.length - 1];
array.at(-1)
var z = array.at(-1);
array[array.length - 1] fn
var x = last1(array);
array.at(-1) fn
var y = last2(array);