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/605.1.15 (KHTML, like Gecko) Version/17.5 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
✓ Unary + (with NaN)	469,318,592 Ops/sec
Unary + (with float)	17,624,038 Ops/sec
parseInt (with NaN)	17,598,678 Ops/sec
Number (with NaN)	16,902,120 Ops/sec
Unary + (with integer)	9,559,237 Ops/sec
parseInt (with float)	9,412,235 Ops/sec
Unary + (with string float)	7,893,255 Ops/sec
Number (with float)	7,310,432 Ops/sec
parseInt (with integer)	6,412,734 Ops/sec
Number (with integer)	6,371,984 Ops/sec
parseInt (with string float)	5,771,878 Ops/sec
Number (with string float)	5,653,516 Ops/sec
parseInt (with string integer)	5,569,950 Ops/sec
Number (with string integer)	5,452,150 Ops/sec
Unary + (with string integer)	4,129,738 Ops/sec

Test name

Executions per second

✓ Unary + (with NaN)

469,318,592 Ops/sec

Unary + (with float)

17,624,038 Ops/sec

parseInt (with NaN)

17,598,678 Ops/sec

Number (with NaN)

16,902,120 Ops/sec

Unary + (with integer)

9,559,237 Ops/sec

parseInt (with float)

9,412,235 Ops/sec

Unary + (with string float)

7,893,255 Ops/sec

Number (with float)

7,310,432 Ops/sec

parseInt (with integer)

6,412,734 Ops/sec

Number (with integer)

6,371,984 Ops/sec

parseInt (with string float)

5,771,878 Ops/sec

Number (with string float)

5,653,516 Ops/sec

parseInt (with string integer)

5,569,950 Ops/sec

Number (with string integer)

5,452,150 Ops/sec

Unary + (with string integer)

4,129,738 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);