Benchmark: javascript loops v2

Tests:

foreach
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; items.forEach(i => index += items[i]);
for-in
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; for (let i in items) index += items[i];
for-of
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; for (let i of items) index += i;
for
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; for(let i = 0; i < items.length; ++i) index += items[i];
optimized-for
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; let i = items.length; while (i--) index += items[i];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
foreach
for-in
for-of
for
optimized-for

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Windows

View result in a separate tab

optimized-for

37K/s

for-of

36K/s

for

36K/s

foreach

29K/s

for-in

24K/s

View exact numbers

Test name	Executions per second
✓ optimized-for	36,761 Ops/sec
for-of	36,487 Ops/sec
for	36,439 Ops/sec
foreach	29,044 Ops/sec
for-in	24,133 Ops/sec

javascript loops v2 (version: 1)

Comparing performance of: `foreach vs for-in vs for-of vs for vs optimized-for`

Created: one year ago by: Guest

Go to the latest result

foreach

for-in

for-of

for

optimized-for

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

javascript loops v2 (version: 1)

Comparing performance of: foreach vs for-in vs for-of vs for vs optimized-for

Created: one year ago by: Guest

Go to the latest result

foreach

for-in

for-of

for

optimized-for

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `foreach vs for-in vs for-of vs for vs optimized-for`