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Run results for:
new Intl.DateTimeFormat vs cached Intl.DateTimeFormat
measure the perf impact of caching calls to new Intl.DateTimeFormat
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<iframe src="https://measurethat.net/Embed?id=624407" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36
Browser:
Chrome 144
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
6 months ago
cached Intl.DateTimeFormat.format()
1.6M/s
cached Intl.DateTimeFormat.formatToParts()
657K/s
new Intl.DateTimeFormat.format()
47K/s
new Intl.DateTimeFormat.formatToParts
44K/s
View exact numbers
Test name
Executions per second
✓
cached Intl.DateTimeFormat.format()
1,622,422 Ops/sec
cached Intl.DateTimeFormat.formatToParts()
656,902 Ops/sec
new Intl.DateTimeFormat.format()
46,509 Ops/sec
new Intl.DateTimeFormat.formatToParts
44,419 Ops/sec
Script Preparation code:
const TWO_DIGIT = '2-digit'; var options = { month: TWO_DIGIT, year: 'numeric', day: TWO_DIGIT, hour: TWO_DIGIT, hour12: false, minute: TWO_DIGIT, second: TWO_DIGIT, } var cached = new Intl.DateTimeFormat('en-US', options);
Tests:
new Intl.DateTimeFormat.format()
new Intl.DateTimeFormat('en-US', options).format(new Date());
cached Intl.DateTimeFormat.format()
cached.format(new Date());
new Intl.DateTimeFormat.formatToParts
new Intl.DateTimeFormat('en-US', options).formatToParts(new Date());
cached Intl.DateTimeFormat.formatToParts()
cached.formatToParts(new Date());