Run results for: Number constructor vs unary plus vs parseInt

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Number (with string integer)	3034876.5 Ops/sec
Unary + (with string integer)	4355184.0 Ops/sec
parseInt (with string integer)	3072651.8 Ops/sec
Number (with string float)	1710057.0 Ops/sec
Unary + (with string float)	2192828.0 Ops/sec
parseInt (with string float)	2057494.2 Ops/sec
Number (with integer)	3253610.5 Ops/sec
Unary + (with integer)	4783480.0 Ops/sec
parseInt (with integer)	3152805.8 Ops/sec
Number (with float)	4899699.5 Ops/sec
Unary + (with float)	9506097.0 Ops/sec
parseInt (with float)	4515847.5 Ops/sec
Number (with NaN)	10056483.0 Ops/sec
Unary + (with NaN)	1037469312.0 Ops/sec
parseInt (with NaN)	7752598.5 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);