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/99.0.4844.51 Safari/537.36 Edg/99.0.1150.39

Browser: Chrome 99

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Number (with string integer)	193047.0 Ops/sec
Unary + (with string integer)	314764.8 Ops/sec
parseInt (with string integer)	260673.6 Ops/sec
Number (with string float)	194994.9 Ops/sec
Unary + (with string float)	248023.9 Ops/sec
parseInt (with string float)	250143.0 Ops/sec
Number (with integer)	331823.0 Ops/sec
Unary + (with integer)	427128.3 Ops/sec
parseInt (with integer)	327635.8 Ops/sec
Number (with float)	412102.8 Ops/sec
Unary + (with float)	831718.1 Ops/sec
parseInt (with float)	385625.8 Ops/sec
Number (with NaN)	1042672.0 Ops/sec
Unary + (with NaN)	346923900.0 Ops/sec
parseInt (with NaN)	702119.3 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);