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Run results for: Number constructor vs unary plus vs parseInt

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:103.0) Gecko/20100101 Firefox/103.0
Firefox 103
Mac OS X 10.15
Desktop
2 years ago
Test name Executions per second
Number (with string integer) 15408722.0 Ops/sec
Unary + (with string integer) 28393816.0 Ops/sec
parseInt (with string integer) 16777988.0 Ops/sec
Number (with string float) 3227645.0 Ops/sec
Unary + (with string float) 3477347.0 Ops/sec
parseInt (with string float) 4251235.5 Ops/sec
Number (with integer) 49667860.0 Ops/sec
Unary + (with integer) 922921792.0 Ops/sec
parseInt (with integer) 48965772.0 Ops/sec
Number (with float) 53104192.0 Ops/sec
Unary + (with float) 997542784.0 Ops/sec
parseInt (with float) 43470736.0 Ops/sec
Number (with NaN) 23818074.0 Ops/sec
Unary + (with NaN) 1208875776.0 Ops/sec
parseInt (with NaN) 36330564.0 Ops/sec
Tests:

  • Number (with string integer)

    AخA
     
    var numberStrInt = Number(Math.floor(1000 * Math.random()).toString());

  • Unary + (with string integer)

     
    var unaryStrInt = +Math.floor(1000 * Math.random()).toString();

  • parseInt (with string integer)

     
    var parseStrInt = parseInt(Math.floor(1000 * Math.random()).toString(), 10);

  • Number (with string float)

     
    var numberStrFloat = Number((1000 * Math.random()).toString());

  • Unary + (with string float)

     
    var unaryStrFloat = +(1000 * Math.random()).toString();

  • parseInt (with string float)

     
    var parseStrFloat = parseInt((1000 * Math.random()).toString(), 10);

  • Number (with integer)

     
    var numberNumInt = Number(Math.floor(1000 * Math.random()));

  • Unary + (with integer)

     
    var unaryNumInt = +Math.floor(1000 * Math.random());

  • parseInt (with integer)

     
    var parseNumInt = parseInt(Math.floor(1000 * Math.random()), 10);

  • Number (with float)

     
    var numberNumFloat = Number(1000 * Math.random());

  • Unary + (with float)

     
    var unaryNumFloat = +(1000 * Math.random());

  • parseInt (with float)

     
    var parseNumFloat = parseInt((1000 * Math.random()), 10);

  • Number (with NaN)

     
    var numberNaN = Number("hello");

  • Unary + (with NaN)

     
    var unaryNaN = +("hello");

  • parseInt (with NaN)

     
    var parseNaN = parseInt("hello", 10);