Run results for: Number constructor vs unary plus vs parseInt

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:103.0) Gecko/20100101 Firefox/103.0

Browser: Firefox 103

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Number (with string integer)	15408720.0 Ops/sec
Unary + (with string integer)	28393820.0 Ops/sec
parseInt (with string integer)	16777990.0 Ops/sec
Number (with string float)	3227645.0 Ops/sec
Unary + (with string float)	3477347.0 Ops/sec
parseInt (with string float)	4251236.0 Ops/sec
Number (with integer)	49667860.0 Ops/sec
Unary + (with integer)	922921800.0 Ops/sec
parseInt (with integer)	48965770.0 Ops/sec
Number (with float)	53104190.0 Ops/sec
Unary + (with float)	997542800.0 Ops/sec
parseInt (with float)	43470740.0 Ops/sec
Number (with NaN)	23818070.0 Ops/sec
Unary + (with NaN)	1208876000.0 Ops/sec
parseInt (with NaN)	36330560.0 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);