Benchmark: Merge 3 small arrays

Script Preparation code:

var array1 = [];
var array2 = [];
var array3 = [];
for (let m = 0; m < 10; m++) {
  array1.push(m);
  array2.push(m + 10);
  array3.push(m + 20);
}

Tests:

Using array spread
let array = [...array1, ...array2, ...array3];
Using clone and push loop
let array = array1.slice(); for (let i = 0; i < array2.length; i++) { array.push(array2[i]); } for (let i = 0; i < array3.length; i++) { array.push(array3[i]); }
Using clone and push spread
let array = array1.slice(); array.push(...array2); array.push(...array3);
Using clone and push spread 2
let array = array1.slice(); array.push(...array2, ...array3);
Using push spread
let array = []; array.push(...array1, ...array2, ...array3);
Using array concat
let array = [].concat(array1, array2, array3);
Using array concat (2)
let array = [].concat(array1).concat(array2).concat(array3);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Using array spread
Using clone and push loop
Using clone and push spread
Using clone and push spread 2
Using push spread
Using array concat
Using array concat (2)

Fastest: N/A

Slowest: N/A

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Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/113.0

Browser/OS: Firefox 113 on Linux

View result in a separate tab

Test name	Executions per second
Using array spread	5324139.0 Ops/sec
Using clone and push loop	10082560.0 Ops/sec
Using clone and push spread	4393179.0 Ops/sec
Using clone and push spread 2	3553578.0 Ops/sec
Using push spread	2945259.0 Ops/sec
Using array concat	7670045.0 Ops/sec
Using array concat (2)	3492119.0 Ops/sec

Merge 3 small arrays (version: 0)

Merge 3 arrays of 10 elements

Comparing performance of: Using array spread vs Using clone and push loop vs Using clone and push spread vs Using clone and push spread 2 vs Using push spread vs Using array concat vs Using array concat (2)

Created: one year ago by: Guest

Jump to the latest result

Using array spread

Using clone and push loop

Using clone and push spread

Using clone and push spread 2

Using push spread

Using array concat

Using array concat (2)

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A