Run results for: array construction comparison - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/117.0

Browser: Firefox 117

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
new Array()	1778515328.0 Ops/sec
Array.from()	903696.9 Ops/sec
[] + length	91637984.0 Ops/sec
[] + fill undefined	107701344.0 Ops/sec
[] + fill void	132005272.0 Ops/sec
new Array() zeroed	93331232.0 Ops/sec
Array.from zeroes	818759.8 Ops/sec
[] + fill zeroes	131934096.0 Ops/sec

Tests:

new Array()
new Array(500)
Array.from()
Array.from({ length: 500 })
[] + length
let a = []; a.length = 500;
[] + fill undefined
[].fill(undefined, 0, 500)
[] + fill void
[].fill(void 0, 0, 500)
new Array() zeroed
new Array().fill(0, 0, 500)
Array.from zeroes
Array.from({ length: 500 }, () => 0)
[] + fill zeroes
[].fill(0, 0, 500)