Benchmark: string.split vs string.substring vs toLocaleDateString("pt-PT") vs Intl.DateTimeateTimeFormat

string.split vs string.substring vs toLocaleDateString("pt-PT") vs Intl.DateTimeateTimeFormat (version: 1)

Comparing performance of: `split vs Date toLocaleString without date being cached vs slice vs substring vs Intl no format cache no date cache vs Intl no format cache with date cache vs Intl with format cache no date cache vs Intl with format cache with date cache vs Date toLocaleString with date being cached`

Created: one year ago by: Guest

Go to the latest result

Script Preparation code:

var dateStr = "2021-08-10";
var dateDate = new Date(dateStr);
var formatter = new Intl.DateTimeFormat("pt-PT");

Tests:

split
const [yyyy, mm, dd] = dateStr.split("/"); const result =`${dd}/${mm}/${yyyy}`;
Date toLocaleString without date being cached
const result = new Date(dateStr).toLocaleString("pt-PT");
slice
const day = dateStr.slice(8, 10); const month = dateStr.slice(5, 7); const year = dateStr.slice(0, 4); const result = `${day}/${month}/${year}`
substring
const day = dateStr.substring(8, 10); const month = dateStr.substring(5, 7); const year = dateStr.substring(0, 4); const result = `${day}/${month}/${year}`
Intl no format cache no date cache
const result = new Intl.DateTimeFormat("pt-PT").format(new Date(dateStr));
Intl no format cache with date cache
const result = new Intl.DateTimeFormat("pt-PT").format(dateDate);
Intl with format cache no date cache
const result = formatter.format(new Date(dateStr));
Intl with format cache with date cache
const result = formatter.format(dateDate);
Date toLocaleString with date being cached
const result = dateDate.toLocaleString("pt-PT");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
Date toLocaleString without date being cached
slice
substring
Intl no format cache no date cache
Intl no format cache with date cache
Intl with format cache no date cache
Intl with format cache with date cache
Date toLocaleString with date being cached

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; rv:136.0) Gecko/20100101 Firefox/136.0

Browser/OS: Firefox 136 on Windows

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substring

733.0M/s

slice

676.5M/s

split

9.7M/s

Intl with format cache with date cache

394K/s

Intl with format cache no date cache

322K/s

Intl no format cache with date cache

7K/s

Intl no format cache no date cache

6K/s

Date toLocaleString with date being cached

6K/s

Date toLocaleString without date being cached

6K/s

View exact numbers

Test name	Executions per second
✓ substring	733,038,336 Ops/sec
slice	676,450,816 Ops/sec
split	9,663,759 Ops/sec
Intl with format cache with date cache	394,238 Ops/sec
Intl with format cache no date cache	322,170 Ops/sec
Intl no format cache with date cache	6,547 Ops/sec
Intl no format cache no date cache	6,414 Ops/sec
Date toLocaleString with date being cached	5,870 Ops/sec
Date toLocaleString without date being cached	5,636 Ops/sec

string.split vs string.substring vs toLocaleDateString("pt-PT") vs Intl.DateTimeateTimeFormat (version: 1)

Created: one year ago by: Guest

Go to the latest result

split

Date toLocaleString without date being cached

slice

substring

Intl no format cache no date cache

Intl no format cache with date cache

Intl with format cache no date cache

Intl with format cache with date cache

Date toLocaleString with date being cached

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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