Benchmark: Array concat vs spread vs push spread, loop, apply vs lodash.concat

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>

Script Preparation code:

var subarrs = [
 [ "hello", true, 7 ],
 [ "yes", "no", "maybe", false, 27 ],
 [ 16, "I", "wonder", "what", "will", "be", "fastest"]
];

Tests:

Array.prototype.concat
var other = [ 1, 2, 3 ] for (var len = subarrs.length, i = 0; i < len; i++){ other = other.concat(subarrs[i]); } return other;
spread operator
var other = [ 1, 2, 3 ] for (var len = subarrs.length, i = 0; i < len; i++){ other = [ ...other, ...subarrs[i] ] } return other;
Push Spread
var other = [ 1, 2, 3 ] for (var len = subarrs.length, i = 0; i < len; i++){ other.push(...subarrs[i]); } return other;
Push Apply
var other = [ 1, 2, 3 ] for (var len = subarrs.length, i = 0; i < len; i++){ other.push.apply(other, subarrs[i]); } return other;
Push Loop
var other = [ 1, 2, 3 ] for (var len = subarrs.length, i = 0; i < len; i++){ for (var jarr = subarrs[i], jen = jarr.length, j = 0; j < jen; j++){ other.push(jarr[j]); } } return other;
lodash concat
var other = [ 1, 2, 3 ]; other = _.concat(other, subarrs); return other;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
spread operator
Push Spread
Push Apply
Push Loop
lodash concat

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 YaBrowser/24.12.0.0 Safari/537.36

Browser/OS: Yandex Browser 24 on Windows

View result in a separate tab

Push Loop

27.9M/s

Push Spread

17.7M/s

Push Apply

17.6M/s

spread operator

12.0M/s

lodash concat

6.4M/s

Array.prototype.concat

5.0M/s

View exact numbers

Test name	Executions per second
✓ Push Loop	27,888,272 Ops/sec
Push Spread	17,719,236 Ops/sec
Push Apply	17,606,722 Ops/sec
spread operator	12,043,091 Ops/sec
lodash concat	6,444,776 Ops/sec
Array.prototype.concat	4,952,620 Ops/sec

Array concat vs spread vs push spread, loop, apply vs lodash.concat (version: 2)

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: `Array.prototype.concat vs spread operator vs Push Spread vs Push Apply vs Push Loop vs lodash concat`

Created: one year ago by: Registered User

Go to the latest result

Array.prototype.concat

spread operator

Push Spread

Push Apply

Push Loop

lodash concat

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Array concat vs spread vs push spread, loop, apply vs lodash.concat (version: 2)

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: Array.prototype.concat vs spread operator vs Push Spread vs Push Apply vs Push Loop vs lodash concat

Created: one year ago by: Registered User

Go to the latest result

Array.prototype.concat

spread operator

Push Spread

Push Apply

Push Loop

lodash concat

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Array.prototype.concat vs spread operator vs Push Spread vs Push Apply vs Push Loop vs lodash concat`