Run results for: Number constructor vs unary plus vs parseInt

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
✓ Number (with NaN)	219,467,760 Ops/sec
Unary + (with float)	133,976,688 Ops/sec
Number (with integer)	132,188,592 Ops/sec
Number (with float)	104,654,040 Ops/sec
parseInt (with float)	103,074,424 Ops/sec
parseInt (with string integer)	85,951,768 Ops/sec
Unary + (with string integer)	84,623,976 Ops/sec
Number (with string integer)	80,467,056 Ops/sec
parseInt (with NaN)	60,623,924 Ops/sec
Unary + (with NaN)	59,961,624 Ops/sec
Unary + (with integer)	46,186,212 Ops/sec
parseInt (with integer)	36,413,292 Ops/sec
parseInt (with string float)	11,500,745 Ops/sec
Unary + (with string float)	10,874,979 Ops/sec
Number (with string float)	10,787,736 Ops/sec

Test name

Executions per second

✓ Number (with NaN)

219,467,760 Ops/sec

Unary + (with float)

133,976,688 Ops/sec

Number (with integer)

132,188,592 Ops/sec

Number (with float)

104,654,040 Ops/sec

parseInt (with float)

103,074,424 Ops/sec

parseInt (with string integer)

85,951,768 Ops/sec

Unary + (with string integer)

84,623,976 Ops/sec

Number (with string integer)

80,467,056 Ops/sec

parseInt (with NaN)

60,623,924 Ops/sec

Unary + (with NaN)

59,961,624 Ops/sec

Unary + (with integer)

46,186,212 Ops/sec

parseInt (with integer)

36,413,292 Ops/sec

parseInt (with string float)

11,500,745 Ops/sec

Unary + (with string float)

10,874,979 Ops/sec

Number (with string float)

10,787,736 Ops/sec

Tests:

Number (with string integer)
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);