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/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
✓ Unary + (with NaN)	177,120,864 Ops/sec
Number (with NaN)	18,472,040 Ops/sec
parseInt (with NaN)	18,233,342 Ops/sec
Unary + (with float)	16,971,142 Ops/sec
Number (with float)	9,237,774 Ops/sec
Unary + (with integer)	9,205,017 Ops/sec
parseInt (with float)	8,878,474 Ops/sec
Unary + (with string integer)	8,787,310 Ops/sec
Number (with integer)	6,293,826 Ops/sec
parseInt (with integer)	6,216,196 Ops/sec
parseInt (with string integer)	6,107,260 Ops/sec
Number (with string integer)	6,082,758 Ops/sec
Unary + (with string float)	4,976,021 Ops/sec
parseInt (with string float)	4,636,587 Ops/sec
Number (with string float)	3,982,962 Ops/sec

Test name

Executions per second

✓ Unary + (with NaN)

177,120,864 Ops/sec

Number (with NaN)

18,472,040 Ops/sec

parseInt (with NaN)

18,233,342 Ops/sec

Unary + (with float)

16,971,142 Ops/sec

Number (with float)

9,237,774 Ops/sec

Unary + (with integer)

9,205,017 Ops/sec

parseInt (with float)

8,878,474 Ops/sec

Unary + (with string integer)

8,787,310 Ops/sec

Number (with integer)

6,293,826 Ops/sec

parseInt (with integer)

6,216,196 Ops/sec

parseInt (with string integer)

6,107,260 Ops/sec

Number (with string integer)

6,082,758 Ops/sec

Unary + (with string float)

4,976,021 Ops/sec

parseInt (with string float)

4,636,587 Ops/sec

Number (with string float)

3,982,962 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);