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

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; Pixel 3 XL Build/RQ1A.201205.003; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.101 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/300.1.0.57.129;]

Browser: Chrome Mobile 87

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
floor	1517522.5 Ops/sec
~~	3077471.2 Ops/sec
>> 0	3118172.8 Ops/sec
\| 0	3103302.5 Ops/sec
<< 0	3080258.8 Ops/sec
& 0xFFFFFFFFFFFF	3066366.2 Ops/sec
^ 0x000000000000	3072188.2 Ops/sec
Math.trunc()	1548214.8 Ops/sec
x - (x % 1)	1782236.0 Ops/sec
parseInt()	1610854.4 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()