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)	1,260,127,232 Ops/sec
Number (with NaN)	5,790,934 Ops/sec
Unary + (with float)	5,494,483 Ops/sec
parseInt (with NaN)	5,324,194 Ops/sec
Unary + (with integer)	3,062,866 Ops/sec
Number (with float)	2,913,221 Ops/sec
Unary + (with string integer)	2,848,017 Ops/sec
parseInt (with float)	2,627,235 Ops/sec
Number (with integer)	2,097,251 Ops/sec
parseInt (with integer)	2,009,013 Ops/sec
Number (with string integer)	1,981,774 Ops/sec
parseInt (with string integer)	1,957,631 Ops/sec
Unary + (with string float)	1,436,460 Ops/sec
parseInt (with string float)	1,290,166 Ops/sec
Number (with string float)	1,136,525 Ops/sec

Test name

Executions per second

✓ Unary + (with NaN)

1,260,127,232 Ops/sec

Number (with NaN)

5,790,934 Ops/sec

Unary + (with float)

5,494,483 Ops/sec

parseInt (with NaN)

5,324,194 Ops/sec

Unary + (with integer)

3,062,866 Ops/sec

Number (with float)

2,913,221 Ops/sec

Unary + (with string integer)

2,848,017 Ops/sec

parseInt (with float)

2,627,235 Ops/sec

Number (with integer)

2,097,251 Ops/sec

parseInt (with integer)

2,009,013 Ops/sec

Number (with string integer)

1,981,774 Ops/sec

parseInt (with string integer)

1,957,631 Ops/sec

Unary + (with string float)

1,436,460 Ops/sec

parseInt (with string float)

1,290,166 Ops/sec

Number (with string float)

1,136,525 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);