Java casting from float to int

Question

I have this algorithm set (In my mind) which requires me to cast float to int many times in a loop(about 300 times for each 16 milli seconds) . My question is this:

How costly is process of casting from float to int in java/android and will it cause the game to slow down ?

Is it cheap enough to be implemented by my game? if not, what are the other options to convert decimal to integer?

Edit: Question solved!

I'd say that you are safe with casting it to an int 300 times in 16 milliseconds. The question about how costly the process is is interesting, but I think you have better things to worry about. — Simon Forsberg
– Simon Forsberg, Commented Dec 21, 2012 at 2:46
it isn't a lot on its own but I have some other algorithms to be implemented in the 16 milli seconds including the time taken by android system to draw the frame... — BLOB
– BLOB, Commented Dec 21, 2012 at 2:48
@SimonAndréForsberg "I'd say that youre safe"? maybe you should cite your sources? :) — Chuck D
– Chuck D, Commented Dec 21, 2012 at 2:48

mtmurdock · Accepted Answer · 2012-12-21 03:28:09Z

1

A cast from float to int doesn't cost any more than any other assignment statement. It is handled by the hardware. An assignment (depending on the architecture) typically costs a single cycle or one trip through the pipeline (very, very fast). I wouldn't worry about the impact of this conversion on your performance.

answered Dec 21, 2012 at 3:28

mtmurdock

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