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Run results for: Number constructor vs unary plus vs parseInt

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0
Firefox 115
Windows
Desktop
one year ago
Test name Executions per second
Number (with string integer) 26658422.0 Ops/sec
Unary + (with string integer) 26949692.0 Ops/sec
parseInt (with string integer) 631521920.0 Ops/sec
Number (with string float) 2857142.5 Ops/sec
Unary + (with string float) 2888993.8 Ops/sec
parseInt (with string float) 664442944.0 Ops/sec
Number (with integer) 24996238.0 Ops/sec
Unary + (with integer) 628573696.0 Ops/sec
parseInt (with integer) 653822464.0 Ops/sec
Number (with float) 28933558.0 Ops/sec
Unary + (with float) 637370752.0 Ops/sec
parseInt (with float) 646396608.0 Ops/sec
Number (with NaN) 583592320.0 Ops/sec
Unary + (with NaN) 641475904.0 Ops/sec
parseInt (with NaN) 640161408.0 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);