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Run results for: Single instance of Intl.NumberFormat vs toLocalString with grouping and min/max digits

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36
Chrome 97
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
Intl.NumberFormat 845591.1 Ops/sec
toLocalString 14903486.0 Ops/sec
HTML Preparation code:
​x
 
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​
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<script> window.formatter = new Intl.NumberFormat("en-US",{
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    style: 'decimal',
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    useGrouping: true,
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    minimumFractionDigits: 0,
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    maximumFractionDigits: 20,
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  });</script>
Tests:

  • Intl.NumberFormat

     
    var a = formatter.format("10000000.1234");

  • toLocalString

     
    var a = "10000000.1234".toLocaleString("en-US",{
        style: 'decimal',
        useGrouping: true,
        minimumFractionDigits: 0,
        maximumFractionDigits: 20,
      });