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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 14

Operating system: iOS 14.4.2

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
floor	5525310.0 Ops/sec
~~	8543164.0 Ops/sec
>> 0	8463518.0 Ops/sec
\| 0	8239861.0 Ops/sec
<< 0	8109767.5 Ops/sec
& 0xFFFFFFFFFFFF	8046047.5 Ops/sec
^ 0x000000000000	8039978.0 Ops/sec
Math.trunc()	4932540.5 Ops/sec
x - (x % 1)	4762514.0 Ops/sec
parseInt()	3412963.5 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()