# Ways to use less CPU? **URL:** \ **Category:** Uncategorized\ **Created:** [May 25, 2011, 2:42pm UTC](https://forum.kirupa.com/t/ways-to-use-less-cpu/322564 "2011-05-25T14:42:45Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![grosbouff](https://avatars.discourse-cdn.com/v4/letter/g/7c8e57/32.png) [@grosbouff](https://forum.kirupa.com/u/grosbouff)\ **Post date:** [May 25, 2011, 2:42pm UTC](https://forum.kirupa.com/t/ways-to-use-less-cpu/322564/1 "2011-05-25T14:42:45Z")
[COLOR=#204a87]\*\*\*\*[/COLOR]Hi guys ! I made a flash game; which is way to slow on old computers. I’m trying to find a way to make it use less CPU; but I have some questions about all this. -Can the CPU usage be related to the comp size ? mine is 960\*830 (but the background is larger). -Is it true that you use less CPU when setting all the unecessary items to mouseEnabled=false ? -if I have a MC playing; but set to visible=false; is it using CPU ressources or is it ignored by the flash player ? : I have a small SWF which loads a larger one. I put it on the stage with addChild. But what about the “main” scene (the loader) ? Should I remove the items ? Or is it enough to set them to visible=false ? -My game uses a lot of FLV videos. For example; you can move the character with the keys. Each time you hit a key, the timeline jumps to the matching frame label. Is it OK to use FLV or is it better to use PNG sequences ? -I heard that you can use less CPU removing all your active listeners when they’ve done what you wanted to. I always do that, but maybe I forgot for some of them. Do you know if there is a way to list all the active listeners ? -Any other tips or debugging tools ? how can I check the CPU usage ? You can check the game here : [http://www.curlydraculafriends.com](http://www.curlydraculafriends.com) - login for the website is “dracula” and password is “lugosi” when the website is loaded, click on “JOUER”. When you have to login; use “test@test.be” as email and “test” as password. thanks A LOT !