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Run results for:
new Intl.DateTimeFormat vs new Date().toLocaleDateString() vs re-using formatter
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36
Browser:
Chrome 141
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
4 months ago
Test name
Executions per second
new Date()
1651587.2 Ops/sec
Intl.DateTimeFormat()
29953.3 Ops/sec
formatter
685493.9 Ops/sec
Script Preparation code:
var options = { year: 'numeric', month: 'numeric', day: 'numeric', hour: 'numeric', minute: 'numeric', second: 'numeric', hour12: false, fractionalSecondDigits: 3, }; var formatter = new Intl.DateTimeFormat('en-US', options);
Tests:
new Date()
(new Date()).toISOString().trim().replace('T', ' ').replace('Z', '')
Intl.DateTimeFormat()
new Intl.DateTimeFormat('en-US', options).format(new Date())
formatter
formatter.format(new Date())