Run results for: Push vs Concat - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; CrOS aarch64 13421.102.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.199 Safari/537.36

Browser: Chrome 86

Operating system: Chrome OS 13421.102.0

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Push 1	6034590.5 Ops/sec
Concat 1	2453014.2 Ops/sec
Push 5	1071058.0 Ops/sec
Concat 5	858651.0 Ops/sec
Push 10	1002268.6 Ops/sec
Concat 10	834476.7 Ops/sec
Push 20	839075.4 Ops/sec
Concat 20	773853.1 Ops/sec

Tests:

Push 1
var arr = [1, 2, 3, 4, 5]; arr.push.apply(arr, [6])
Concat 1
var arr = [1, 2, 3, 4, 5]; arr = arr.concat([6])
Push 5
var arr = [1, 2, 3, 4, 5]; arr.push.apply(arr, new Array(5).fill(0))
Concat 5
var arr = [1, 2, 3, 4, 5]; arr.concat(new Array(5).fill(0))
Push 10
var arr = [1, 2, 3, 4, 5]; arr.push.apply(arr, new Array(10).fill(0))
Concat 10
var arr = [1, 2, 3, 4, 5]; arr.concat(new Array(10).fill(0))
Push 20
var arr = [1, 2, 3, 4, 5]; arr.push.apply(arr, new Array(20).fill(0))
Concat 20
var arr = [1, 2, 3, 4, 5]; arr.concat(new Array(20).fill(0))

;