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/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
✓ Unary + (with NaN)	191,055,920 Ops/sec
parseInt (with NaN)	182,255,680 Ops/sec
Number (with NaN)	175,403,456 Ops/sec
Unary + (with float)	108,123,280 Ops/sec
Unary + (with integer)	107,708,480 Ops/sec
Number (with integer)	105,851,616 Ops/sec
Number (with float)	104,540,648 Ops/sec
parseInt (with integer)	95,503,744 Ops/sec
parseInt (with float)	81,386,304 Ops/sec
parseInt (with string integer)	71,857,376 Ops/sec
Unary + (with string integer)	71,371,760 Ops/sec
Number (with string integer)	68,985,520 Ops/sec
parseInt (with string float)	10,191,766 Ops/sec
Unary + (with string float)	9,700,726 Ops/sec
Number (with string float)	9,598,690 Ops/sec

Test name

Executions per second

✓ Unary + (with NaN)

191,055,920 Ops/sec

parseInt (with NaN)

182,255,680 Ops/sec

Number (with NaN)

175,403,456 Ops/sec

Unary + (with float)

108,123,280 Ops/sec

Unary + (with integer)

107,708,480 Ops/sec

Number (with integer)

105,851,616 Ops/sec

Number (with float)

104,540,648 Ops/sec

parseInt (with integer)

95,503,744 Ops/sec

parseInt (with float)

81,386,304 Ops/sec

parseInt (with string integer)

71,857,376 Ops/sec

Unary + (with string integer)

71,371,760 Ops/sec

Number (with string integer)

68,985,520 Ops/sec

parseInt (with string float)

10,191,766 Ops/sec

Unary + (with string float)

9,700,726 Ops/sec

Number (with string float)

9,598,690 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);