Benchmark: Array deconstruction vs array push

Array deconstruction vs array push (version: 0)

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

Comparing performance of: `Small test: array deconstruct vs Medium test: array deconstruct vs Large test: array deconstruct vs Small test: array push vs Medium test: array push vs Large test: array push`

Created: 4 years ago by: Guest

Go to the latest result

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);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Small test: array deconstruct
Medium test: array deconstruct
Large test: array deconstruct
Small test: array push
Medium test: array push
Large test: array push

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

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

Browser/OS: Chrome 129 on Linux

View result in a separate tab

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