Benchmark: Different method to traverse a reversed array.

Script Preparation code:

const array = Array(10000).fill(0).map((_, i) => i);

Tests:

for loop
let sum = 0; for (let i = array.length - 1; i >= 0; i--) { sum += array[i]; }
for of with reverse
let sum = 0; for (const v of [...array].reverse()) { sum += v; }
for of with toReversed
let sum = 0; for (const v of array.toReversed()) { sum += v; }
reduceRight
const sum = array.reduceRight((prev, curr) => prev + curr, 0);
reduceRight with add operation
let sum = 0; array.reduceRight((_, curr) => { sum += curr; })
forEach with reverse
let sum = 0; [...array].reverse().forEach(v => { sum += v; });
forEach with toReversed
let sum = 0; array.toReversed().forEach(v => { sum += v; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for loop
for of with reverse
for of with toReversed
reduceRight
reduceRight with add operation
forEach with reverse
forEach with toReversed

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser/OS: Firefox 138 on Linux

View result in a separate tab

for loop

126K/s

reduceRight

16K/s

reduceRight with add operation

14K/s

for of with toReversed

10K/s

forEach with toReversed

10K/s

for of with reverse

7K/s

forEach with reverse

7K/s

View exact numbers

Test name	Executions per second
✓ for loop	125,858 Ops/sec
reduceRight	16,015 Ops/sec
reduceRight with add operation	14,299 Ops/sec
for of with toReversed	10,399 Ops/sec
forEach with toReversed	9,918 Ops/sec
for of with reverse	7,149 Ops/sec
forEach with reverse	6,738 Ops/sec

Different method to traverse a reversed array. (version: 1)

Comparing performance of: `for loop vs for of with reverse vs for of with toReversed vs reduceRight vs reduceRight with add operation vs forEach with reverse vs forEach with toReversed`

Created: one year ago by: Registered User

Go to the latest result

for loop

for of with reverse

for of with toReversed

reduceRight

reduceRight with add operation

forEach with reverse

forEach with toReversed

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Different method to traverse a reversed array. (version: 1)

Comparing performance of: for loop vs for of with reverse vs for of with toReversed vs reduceRight vs reduceRight with add operation vs forEach with reverse vs forEach with toReversed

Created: one year ago by: Registered User

Go to the latest result

for loop

for of with reverse

for of with toReversed

reduceRight

reduceRight with add operation

forEach with reverse

forEach with toReversed

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `for loop vs for of with reverse vs for of with toReversed vs reduceRight vs reduceRight with add operation vs forEach with reverse vs forEach with toReversed`