Benchmark: Shallow copy performance

Script Preparation code:

var data = [];
var res = [];

fetch('https://jsonplaceholder.typicode.com/posts')
  .then(response => response.json())
  .then(json => data = json)

Tests:

slice
res = data.slice();
concat
res = data.concat();
forEach
res = []; data.forEach(element => res.push(element));
Traditional For Loop
res = []; for (let i = 0; i < data.length; i++) { res.push(data[i]); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
concat
forEach
Traditional For Loop

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Browser/OS: Chrome 71 on Mac OS X 10.14.2

View result in a separate tab

Test name	Executions per second
slice	4309206.0 Ops/sec
concat	3314343.0 Ops/sec
forEach	4537917.0 Ops/sec
Traditional For Loop	4854953.0 Ops/sec

Shallow copy performance (version: 7)

Comparing performance of: slice vs concat vs forEach vs Traditional For Loop

Created: 5 years ago by: Registered User

Jump to the latest result

slice

concat

forEach

Traditional For Loop

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A