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Run results for: new Date(date) vs new Date(normalizeToLocalDate(date)) 2

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36
Chrome 127
Mac OS X 10.15.7
Desktop
7 months ago
Test name Executions per second
new Date(dateTimeISO) 4279278.5 Ops/sec
new Date(normalizeToLocalDate(dateTimeISO)) 4273234.0 Ops/sec
new Date(dateOnlyISO) 5783702.5 Ops/sec
new Date(normalizeToLocalDate(dateOnlyISO)) 2984259.8 Ops/sec
Script Preparation code:
​x
 
var dateTimeISO = '2024-08-21T17:00:00.000Z'
var dateOnlyISO = '2024-08-21'
​
var normalizeToLocalDate = (date) => ` ${date}`
Tests:

  • new Date(dateTimeISO)

     
    new Date(dateTimeISO)

  • new Date(normalizeToLocalDate(dateTimeISO))

     
    new Date(normalizeToLocalDate(dateTimeISO))

  • new Date(dateOnlyISO)

     
    new Date(dateOnlyISO)

  • new Date(normalizeToLocalDate(dateOnlyISO))

     
    new Date(normalizeToLocalDate(dateOnlyISO))