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

Run details:

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

Browser: Firefox 150

Operating system: Linux

Device Platform: Desktop

Date tested: 3 months ago

for (C style)

21.9M/s

forEach

18.8M/s

for...of

15.0M/s

View exact numbers

Test name	Executions per second
✓ for (C style)	21,925,198 Ops/sec
forEach	18,835,632 Ops/sec
for...of	14,951,366 Ops/sec

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]();