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/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
✓ Unary + (with NaN)	170,938,800 Ops/sec
Number (with NaN)	15,403,207 Ops/sec
parseInt (with NaN)	15,394,857 Ops/sec
Unary + (with float)	14,679,106 Ops/sec
Unary + (with integer)	7,932,063 Ops/sec
Number (with float)	7,846,660 Ops/sec
parseInt (with float)	7,526,770 Ops/sec
Unary + (with string integer)	7,504,464 Ops/sec
Number (with integer)	5,446,434 Ops/sec
parseInt (with integer)	5,331,914 Ops/sec
parseInt (with string integer)	5,245,568 Ops/sec
Number (with string integer)	5,188,144 Ops/sec
Unary + (with string float)	3,841,696 Ops/sec
parseInt (with string float)	3,814,571 Ops/sec
Number (with string float)	3,097,999 Ops/sec

Test name

Executions per second

✓ Unary + (with NaN)

170,938,800 Ops/sec

Number (with NaN)

15,403,207 Ops/sec

parseInt (with NaN)

15,394,857 Ops/sec

Unary + (with float)

14,679,106 Ops/sec

Unary + (with integer)

7,932,063 Ops/sec

Number (with float)

7,846,660 Ops/sec

parseInt (with float)

7,526,770 Ops/sec

Unary + (with string integer)

7,504,464 Ops/sec

Number (with integer)

5,446,434 Ops/sec

parseInt (with integer)

5,331,914 Ops/sec

parseInt (with string integer)

5,245,568 Ops/sec

Number (with string integer)

5,188,144 Ops/sec

Unary + (with string float)

3,841,696 Ops/sec

parseInt (with string float)

3,814,571 Ops/sec

Number (with string float)

3,097,999 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);