# Optimization: cacheAsBitmap vs PNG

**URL:** <https://forum.kirupa.com/t/optimization-cacheasbitmap-vs-png/246861>\
**Category:** flash\
**Created:** [December 15, 2007, 2:47pm UTC](https://forum.kirupa.com/t/optimization-cacheasbitmap-vs-png/246861 "2007-12-15T14:47:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![steve\_b](https://avatars.discourse-cdn.com/v4/letter/s/ee7513/32.png) [@steve\_b](https://forum.kirupa.com/u/steve_b)\
**Post date:** [December 15, 2007, 2:47pm UTC](https://forum.kirupa.com/t/optimization-cacheasbitmap-vs-png/246861/1 "2007-12-15T14:47:18Z")

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I have gone through the search function, cant find the specific answer I am after.

From a pure optimization point, is it better to cache a movieclip as a bitmap, or to import it as a png? These movieclips are static, no animations or anything. Only there \_x value changes throughout the movie.

I hand drew these objects in flash, then optimized them using the shape curves thing. I could reimport them as PNGs if that will help optimize performance - I am having issues of the movie chugging!