Run results for: Push vs Concat - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36

Browser: Chrome 80

Operating system: Windows 7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Push 1	26732056.0 Ops/sec
Concat 1	5322413.5 Ops/sec
Push 5	3382080.8 Ops/sec
Concat 5	2291399.2 Ops/sec
Push 10	2973071.5 Ops/sec
Concat 10	1854091.1 Ops/sec
Push 20	2349390.8 Ops/sec
Concat 20	1770634.5 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))

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