# SWF file size larger with CS3?

**URL:** <https://forum.kirupa.com/t/swf-file-size-larger-with-cs3/225333>\
**Category:** flash\
**Created:** [May 10, 2007, 7:17pm UTC](https://forum.kirupa.com/t/swf-file-size-larger-with-cs3/225333 "2007-05-10T19:17:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![xerbutter](https://avatars.discourse-cdn.com/v4/letter/x/bbe5ce/32.png) [@xerbutter](https://forum.kirupa.com/u/xerbutter)\
**Post date:** [May 10, 2007, 7:17pm UTC](https://forum.kirupa.com/t/swf-file-size-larger-with-cs3/225333/1 "2007-05-10T19:17:46Z")

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Has anyone else noticed that SWF file size has increased when compiled with Flash CS3 instead of Flash 8?

I just opened up a couple of old Flash 8 FLA’s in CS3 and compiled, and on average they’re 20% bigger. That seems like a big hit. Am I missing something? It looks like most of the hit comes from graphics not being compressed as much. Should I just compress graphics more in CS3 to get back to the old file sizes?