Run results for: Array deconstruction vs array push

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Browser: Firefox 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Small test: array deconstruct	1387076.0 Ops/sec
Medium test: array deconstruct	155512.7 Ops/sec
Large test: array deconstruct	14184.0 Ops/sec
Small test: array push	38955424.0 Ops/sec
Medium test: array push	34407104.0 Ops/sec
Large test: array push	43233036.0 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);

Run results for: Array deconstruction vs array push

Shows the decremental performance when unnecessarily recreating an array when pushing new items to it.

Small test: array deconstruct

Medium test: array deconstruct

Large test: array deconstruct

Small test: array push

Medium test: array push

Large test: array push