Benchmark: Spread vs concat vs forEach array v1000

Tests:

Concat
const arr1 = Array.from({ length: 1000000}).map((_, i) => i); const arr2 = Array.from({ length: 1000000}).map((_, i) => i); const arr3 = Array.from({ length: 1000000}).map((_, i) => i); const finallArr1 = arr1.concat(arr2).concat(arr3);
forEach
const arr1 = Array.from({ length: 1000000}).map((_, i) => i); const arr2 = Array.from({ length: 1000000}).map((_, i) => i); const arr3 = Array.from({ length: 1000000}).map((_, i) => i); const finalArr2 = []; arr1.forEach((e) => finalArr2.push(e)); arr2.forEach((e) => finalArr2.push(e)); arr3.forEach((e) => finalArr2.push(e));
Spread
const arr1 = Array.from({ length: 1000000}).map((_, i) => i); const arr2 = Array.from({ length: 1000000}).map((_, i) => i); const arr3 = Array.from({ length: 1000000}).map((_, i) => i); const finalArr3 = [...arr1, ...arr2, ...arr3];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Concat
forEach
Spread

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/117.2 Mobile/15E148 Safari/605.1.15

Browser/OS: Mobile Safari 16 on iOS 16.6.1

View result in a separate tab

Test name	Executions per second
Concat	30.0 Ops/sec
forEach	17.6 Ops/sec
Spread	32.2 Ops/sec

Spread vs concat vs forEach array v1000 (version: 0)

Comparing performance of: Concat vs forEach vs Spread

Created: one year ago by: Guest

Jump to the latest result

Concat

forEach

Spread

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A