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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=601060" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
cached Intl.DateTimeFormat.format()
924K/s
cached Intl.DateTimeFormat.formatToParts()
398K/s
new Intl.DateTimeFormat.formatToParts
23K/s
new Intl.DateTimeFormat.format()
21K/s
View exact numbers
Test name
Executions per second
✓
cached Intl.DateTimeFormat.format()
923,964 Ops/sec
cached Intl.DateTimeFormat.formatToParts()
398,349 Ops/sec
new Intl.DateTimeFormat.formatToParts
22,980 Ops/sec
new Intl.DateTimeFormat.format()
21,067 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());