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Run results for: toFixed vs toPrecision vs Math.round() different

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
Chrome 70
Windows
Desktop
6 years ago
Test name Executions per second
toFixed(4) 571267.5 Ops/sec
toPrecision(4).toString() 1659317.5 Ops/sec
(Math.round(*10000)/10000).toString() 1594487.2 Ops/sec
Script Preparation code:
AخA
 
var someFloat = 0.123456789;
Tests:

  • toFixed(4)

     
    Number(someFloat.toFixed(4));

  • toPrecision(4).toString()

     
    someFloat.toPrecision(4)

  • (Math.round(*10000)/10000).toString()

    ​x
     
    (Math.round(someFloat*10000)/10000)
    ​