# Scrolling / Panning MovieClip CPU usage

**URL:** <https://forum.kirupa.com/t/scrolling-panning-movieclip-cpu-usage/304530>\
**Category:** flash\
**Created:** [February 9, 2010, 2:00pm UTC](https://forum.kirupa.com/t/scrolling-panning-movieclip-cpu-usage/304530 "2010-02-09T14:00:49Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![phil7](https://avatars.discourse-cdn.com/v4/letter/p/22d042/32.png) [@phil7](https://forum.kirupa.com/u/phil7)\
**Post date:** [February 9, 2010, 2:00pm UTC](https://forum.kirupa.com/t/scrolling-panning-movieclip-cpu-usage/304530/1 "2010-02-09T14:00:49Z")

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Hi, im making a scalable in browser swf and im having real problems with cpu usage.

I have a large movie clip (2000px by 2000px), this will hold vector images. My first approach was to simply adjust the movieclip x and y property. This worked fine but was slow when the swf was scaled up in the users browser.

So I have changed all code so scrollRect is used. This means I have to convert the movieclip to bitmap before scrolling for a smooth transition. However, im dissapointed to see CPU usage is still a problem when the swf is scaled up! Bitmap caching is on for the bitmap being scrolled.

Can anyone help?