Run results for: Array deconstruction vs array push

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Small test: array push

37.9M/s

Medium test: array push

25.5M/s

Large test: array push

21.3M/s

Small test: array deconstruct

1.2M/s

Medium test: array deconstruct

118K/s

Large test: array deconstruct

11K/s

View exact numbers

Test name	Executions per second
✓ Small test: array push	37,944,376 Ops/sec
Medium test: array push	25,519,598 Ops/sec
Large test: array push	21,343,318 Ops/sec
Small test: array deconstruct	1,164,992 Ops/sec
Medium test: array deconstruct	118,008 Ops/sec
Large test: array deconstruct	10,709 Ops/sec

Script Preparation code:

var sTest = Array.apply(null, Array(100)).map(function (x, i) { return i; });
var mTest = Array.apply(null, Array(1000)).map(function (x, i) { return i; });
var lTest = Array.apply(null, Array(10000)).map(function (x, i) { return i; });

Tests:

Small test: array deconstruct
let result = [ ...sTest, 0 ];
Medium test: array deconstruct
let result = [ ...mTest, 0 ];
Large test: array deconstruct
let result = [ ...lTest, 0 ];
Small test: array push
sTest.push(0);
Medium test: array push
mTest.push(0);
Large test: array push
lTest.push(0);