Run results for: floor() vs trunc() vs bitwise hacks (~~, >> 0, etc)

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; SM-S901E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.97 Mobile Safari/537.36 OPR/71.3.3718.67322

Browser: Opera Mobile 71

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
floor	2585445.8 Ops/sec
~~	4824398.0 Ops/sec
>> 0	4751072.5 Ops/sec
\| 0	4858639.0 Ops/sec
<< 0	4747525.0 Ops/sec
& 0xFFFFFFFFFFFF	4325964.5 Ops/sec
^ 0x000000000000	4052137.0 Ops/sec
Math.trunc()	2222748.5 Ops/sec
x - (x % 1)	2349359.8 Ops/sec
parseInt()	2130897.0 Ops/sec

Script Preparation code:

var x = Math.random() * 100000000;
var y;

Tests:

floor
y = Math.floor(x);
~~
y = ~~x;
>> 0
y = x >> 0;
| 0
y = x | 0;
<< 0
y = x << 0;
& 0xFFFFFFFFFFFF
y = x & 0xFFFFFFFFFFFF;
^ 0x000000000000
y = x ^ 0x000000000000;
Math.trunc()
y = Math.trunc(x);
x - (x % 1)
y = x - (x % 1);
parseInt()
y = parseInt(x)

Run results for: floor() vs trunc() vs bitwise hacks (~~, >> 0, etc)

floor

~~

>> 0

| 0

<< 0

& 0xFFFFFFFFFFFF

^ 0x000000000000

Math.trunc()

x - (x % 1)

parseInt()