Run results for: Array deconstruction vs array push

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Small test: array push

14.4M/s

Medium test: array push

14.0M/s

Large test: array push

13.8M/s

Small test: array deconstruct

5.8M/s

Medium test: array deconstruct

1.1M/s

Large test: array deconstruct

146K/s

View exact numbers

Test name	Executions per second
✓ Small test: array push	14,408,392 Ops/sec
Medium test: array push	14,007,903 Ops/sec
Large test: array push	13,754,903 Ops/sec
Small test: array deconstruct	5,833,384 Ops/sec
Medium test: array deconstruct	1,050,047 Ops/sec
Large test: array deconstruct	145,509 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);