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

Large test: array push

43.2M/s

Small test: array push

39.0M/s

Medium test: array push

34.4M/s

Small test: array deconstruct

1.4M/s

Medium test: array deconstruct

156K/s

Large test: array deconstruct

14K/s

View exact numbers

Test name	Executions per second
✓ Large test: array push	43,233,036 Ops/sec
Small test: array push	38,955,424 Ops/sec
Medium test: array push	34,407,104 Ops/sec
Small test: array deconstruct	1,387,076 Ops/sec
Medium test: array deconstruct	155,513 Ops/sec
Large test: array deconstruct	14,184 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);