Benchmark: for loops vs forEach test: call functions from Object.values() with 4 items

Script Preparation code:

 var functions = [
    () => Math.random() + 10,
    () => Math.sqrt(Math.random() * 100),
    () => Math.floor(Math.random() * 50),
    () => Math.pow(Math.random(), 2),
];
var functionsMap = {};
functions.forEach((fn, i) => functionsMap[i+""] = fn);

Tests:

for...of
const values = Object.values(functionsMap); for (const fun of values) fun();
forEach
const values = Object.values(functionsMap); values.forEach(fun => fun());
for (C style)
const values = Object.values(functionsMap); for (let i = 0; i < values.length; i++) values[i]();

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Firefox 5 runs

for (C style)

22.5M/s

forEach

19.1M/s

for...of

15.4M/s

Fastest: for (C style) (1.5x faster)

View exact numbers

✓ for (C style): 22,517,124 ops/sec
• forEach: 19,095,538 ops/sec
• for...of: 15,430,283 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
for...of
forEach
for (C style)

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0

Browser/OS: Firefox 150 on Linux

View result in a separate tab

for (C style)

22.5M/s

forEach

18.9M/s

for...of

15.6M/s

View exact numbers

Test name	Executions per second
✓ for (C style)	22,517,124 Ops/sec
forEach	18,887,886 Ops/sec
for...of	15,556,968 Ops/sec

for loops vs forEach test: call functions from Object.values() with 4 items (version: 1)

Comparing performance of: `for...of vs forEach vs for (C style)`

Created: 3 months ago by: Registered User

Go to the latest result

for...of

forEach

for (C style)

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Firefox 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

for loops vs forEach test: call functions from Object.values() with 4 items (version: 1)

Comparing performance of: for...of vs forEach vs for (C style)

Created: 3 months ago by: Registered User

Go to the latest result

for...of

forEach

for (C style)

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Firefox 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `for...of vs forEach vs for (C style)`