Run results for: shift vs slice (copy array)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser: Chrome 140

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

manual

123.0M/s

shift

108.4M/s

slice

65.2M/s

View exact numbers

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()