Run results for: Number constructor vs unary plus vs parseInt

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 120

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
✓ Unary + (with NaN)	782,283,712 Ops/sec
Number (with NaN)	6,205,412 Ops/sec
parseInt (with NaN)	6,071,031 Ops/sec
Unary + (with float)	5,933,990 Ops/sec
Unary + (with integer)	3,103,226 Ops/sec
parseInt (with float)	3,035,085 Ops/sec
Number (with float)	3,033,404 Ops/sec
Unary + (with string integer)	2,854,920 Ops/sec
parseInt (with integer)	2,079,005 Ops/sec
Number (with integer)	2,078,077 Ops/sec
parseInt (with string integer)	1,994,036 Ops/sec
Number (with string integer)	1,982,554 Ops/sec
Unary + (with string float)	1,496,224 Ops/sec
parseInt (with string float)	1,347,984 Ops/sec
Number (with string float)	1,169,534 Ops/sec

Test name

Executions per second

✓ Unary + (with NaN)

782,283,712 Ops/sec

Number (with NaN)

6,205,412 Ops/sec

parseInt (with NaN)

6,071,031 Ops/sec

Unary + (with float)

5,933,990 Ops/sec

Unary + (with integer)

3,103,226 Ops/sec

parseInt (with float)

3,035,085 Ops/sec

Number (with float)

3,033,404 Ops/sec

Unary + (with string integer)

2,854,920 Ops/sec

parseInt (with integer)

2,079,005 Ops/sec

Number (with integer)

2,078,077 Ops/sec

parseInt (with string integer)

1,994,036 Ops/sec

Number (with string integer)

1,982,554 Ops/sec

Unary + (with string float)

1,496,224 Ops/sec

parseInt (with string float)

1,347,984 Ops/sec

Number (with string float)

1,169,534 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);