Benchmark: for-loop vs for-of perf test

HTML Preparation code:

<script>
  const listOfHundred = Array.from({
    length: 100
}, (_, i) => i)
const listOfThousand = Array.from({
    length: 1000
}, (_, i) => i)
const listOfMillion = Array.from({
    length: 1_000_000
}, (_, i) => i)
</script>

Tests:

For-loop 100 Items
let r = 0 for (let i = 0; i < listOfHundred.length; ++i) { r += listOfHundred[i] }
For-of 100 Items
let r = 0 for (const x of listOfHundred) { r += x }
For-loop 1000 Items
let r = 0 for (let i = 0; i < listOfThousand.length; ++i) { r += listOfThousand[i] }
For-of 1000 items
let r = 0 for (const x of listOfThousand) { r += x }
For-loop 1mil items
let r = 0 for (let i = 0; i < listOfMillion.length; ++i) { r += listOfMillion[i] }
For-of 1mil items
let r = 0 for (const x of listOfMillion) { r += x }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
For-loop 100 Items
For-of 100 Items
For-loop 1000 Items
For-of 1000 items
For-loop 1mil items
For-of 1mil items

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser/OS: Chrome 103 on Mac OS X 10.11.6

View result in a separate tab

Test name	Executions per second
For-loop 100 Items	24613.8 Ops/sec
For-of 100 Items	2114820.0 Ops/sec
For-loop 1000 Items	2498.8 Ops/sec
For-of 1000 items	371018.1 Ops/sec
For-loop 1mil items	2.5 Ops/sec
For-of 1mil items	247.9 Ops/sec

for-loop vs for-of perf test (version: 0)

Checking to see the performance differences of for-loop vs for-of

Comparing performance of: For-loop 100 Items vs For-of 100 Items vs For-loop 1000 Items vs For-of 1000 items vs For-loop 1mil items vs For-of 1mil items

Created: one year ago by: Guest

Jump to the latest result

For-loop 100 Items

For-of 100 Items

For-loop 1000 Items

For-of 1000 items

For-loop 1mil items

For-of 1mil items

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A