Benchmark: array operations vs generators vs for loop

Script Preparation code:

const array = Array.from({ length: 10_000 }, (_, i) => i);

Tests:

array operations
array .filter((el) => el % 2) .map((el) => el ** 2) .forEach((el) => console.log(el));
generators
function* filterOddIt(it) { for (const el of it) if (el % 2) yield el; } function* squareIt(it) { for (const el of it) yield el ** 2; } function printIt(it) { for (const el of it) console.log(el); } printIt(squareIt(filterOddIt(array)));
for loop
const result = []; for (const el of array) { if (el % 2 == 0) continue; const r = el ** 2; result.push(r); console.log(r); }

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

array operations

64/s

generators

61/s

for loop

55/s

Fastest: array operations (1.2x faster)

View exact numbers

✓ array operations: 64 ops/sec
• generators: 61 ops/sec
• for loop: 55 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array operations
generators
for loop

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Browser/OS: Chrome 144 on Windows

View result in a separate tab

array operations

65/s

generators

61/s

for loop

55/s

View exact numbers

Test name	Executions per second
✓ array operations	65 Ops/sec
generators	61 Ops/sec
for loop	55 Ops/sec

array operations vs generators vs for loop (version: 3)

Comparing performance of: `array operations vs generators vs for loop`

Created: one year ago by: Registered User

Go to the latest result

array operations

generators

for loop

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

array operations vs generators vs for loop (version: 3)

Comparing performance of: array operations vs generators vs for loop

Created: one year ago by: Registered User

Go to the latest result

array operations

generators

for loop

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `array operations vs generators vs for loop`