The first bytes of a SWF will never be PK. A SWC will, but not a SWF. SWFs produced by Flex are compressed, but cannot be de-compressed by ZIP.
Depending on how you built your SWF, there might be different sets of classes or classes that will be loaded via RSL and therefore not in the main SWF. Alex Harui Flex SDK Developer Adobe Systems Inc.<http://www.adobe.com/> Blog: http://blogs.adobe.com/aharui From: [email protected] [mailto:[email protected]] On Behalf Of smitade Sent: Monday, March 02, 2009 11:37 AM To: [email protected] Subject: [flexcoders] Compressed swf swf files appear to be compressed - headers start with PK. I was comparing the swf filesizes of different flex frameworks Cairngorm, Mate, PureMVC, etc and found significant differences. Cairngorm, for example, was down to 11 KB. How does one compress your swf down to this size.

