Run results for: Array deconstruction vs array push

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Small test: array push

10.9M/s

Medium test: array push

10.3M/s

Large test: array push

6.1M/s

Small test: array deconstruct

3.3M/s

Medium test: array deconstruct

455K/s

Large test: array deconstruct

53K/s

View exact numbers

Test name	Executions per second
✓ Small test: array push	10,886,023 Ops/sec
Medium test: array push	10,316,635 Ops/sec
Large test: array push	6,066,214 Ops/sec
Small test: array deconstruct	3,346,864 Ops/sec
Medium test: array deconstruct	455,470 Ops/sec
Large test: array deconstruct	53,021 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);