[Nutrox]

 
You can use the bitwise right-shift operator to floor a number instead of using Math.floor(). Normally Math.floor() is absolutely fine to use, but if you are concerned about CPU cycles then this alternative will come in handy because it is a lot quicker than Math.floor().

Here is an example using Math.floor()...

var num:Number = 123.456;
num = Math.floor(num);
 
trace( num ); // output: 123 
 

...and here is the same thing, but this time the bitwise right-shift operator is used...

var num:Number = 123.456;
num >>= 0; // num >>= zero
 
trace( num ); // output: 123