# Translating Bitmaps result in frame rate drop

**URL:** <https://forum.kirupa.com/t/translating-bitmaps-result-in-frame-rate-drop/320530>\
**Category:** flash\
**Created:** [March 26, 2011, 3:40am UTC](https://forum.kirupa.com/t/translating-bitmaps-result-in-frame-rate-drop/320530 "2011-03-26T03:40:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![doogog](https://avatars.discourse-cdn.com/v4/letter/d/dec6dc/32.png) [@doogog](https://forum.kirupa.com/u/doogog)\
**Post date:** [March 26, 2011, 3:40am UTC](https://forum.kirupa.com/t/translating-bitmaps-result-in-frame-rate-drop/320530/1 "2011-03-26T03:40:14Z")

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I’m having this problem where my frame rate would drop tremendously when I translate(change x and y values) about 600 bitmaps every frame.

The weird thing that is the performance drop only occurs with bitmaps above a certain size, larger than ~70x70 pixels.

Smoothing is turned off, and I’ve made sure the width, height, x, y values are integers only. I’ve verified with the flash profiler that the [pre-render] operation is what takes up most of the CPU cycles.

I thought only scaling and other transformations were heavy on CPU, not translations. Anyone know why this is or how to fix it? Thanks.