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Run results for:
shift vs slice (copy array)
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Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.7.2 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 18
Operating system:
iOS 18.7
Device Platform:
Mobile
Date tested:
4 months ago
Test name
Executions per second
shift
60763832.0 Ops/sec
slice
20330316.0 Ops/sec
manual
221969232.0 Ops/sec
Script Preparation code:
const array = [] for (let i = 0; i < 1e3; ++i) array.push(i)
Tests:
shift
array.shift()
slice
array.slice(1)
manual
for (let i = 1; i < array.length; ++i) array[i - 1] = array[i] array.pop()