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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=629554" 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/148.0.0.0 Safari/537.36
Browser:
Chrome 148
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one month ago
cached Intl.DateTimeFormat.format()
2.0M/s
cached Intl.DateTimeFormat.formatToParts()
796K/s
new Intl.DateTimeFormat.format()
52K/s
new Intl.DateTimeFormat.formatToParts
50K/s
View exact numbers
Test name
Executions per second
✓
cached Intl.DateTimeFormat.format()
1,978,298 Ops/sec
cached Intl.DateTimeFormat.formatToParts()
795,503 Ops/sec
new Intl.DateTimeFormat.format()
52,181 Ops/sec
new Intl.DateTimeFormat.formatToParts
50,217 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());