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
✓ parseInt (with NaN)	167,328,080 Ops/sec
Unary + (with NaN)	163,644,784 Ops/sec
Number (with NaN)	161,439,440 Ops/sec
Unary + (with integer)	99,832,136 Ops/sec
Number (with integer)	96,539,968 Ops/sec
Number (with float)	95,702,048 Ops/sec
Unary + (with float)	92,928,128 Ops/sec
parseInt (with integer)	83,664,560 Ops/sec
parseInt (with float)	73,734,416 Ops/sec
parseInt (with string integer)	66,295,688 Ops/sec
Unary + (with string integer)	65,304,000 Ops/sec
Number (with string integer)	62,836,328 Ops/sec
parseInt (with string float)	8,790,988 Ops/sec
Unary + (with string float)	8,178,986 Ops/sec
Number (with string float)	8,085,738 Ops/sec

Test name

Executions per second

✓ parseInt (with NaN)

167,328,080 Ops/sec

Unary + (with NaN)

163,644,784 Ops/sec

Number (with NaN)

161,439,440 Ops/sec

Unary + (with integer)

99,832,136 Ops/sec

Number (with integer)

96,539,968 Ops/sec

Number (with float)

95,702,048 Ops/sec

Unary + (with float)

92,928,128 Ops/sec

parseInt (with integer)

83,664,560 Ops/sec

parseInt (with float)

73,734,416 Ops/sec

parseInt (with string integer)

66,295,688 Ops/sec

Unary + (with string integer)

65,304,000 Ops/sec

Number (with string integer)

62,836,328 Ops/sec

parseInt (with string float)

8,790,988 Ops/sec

Unary + (with string float)

8,178,986 Ops/sec

Number (with string float)

8,085,738 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);