Till now I was using "Merged into code" for "Framework Linkage" in
Flex Builder. Now, I changed it to "Runtime shared library". On doing
a release build I got myapp.swf which is roughly 260 KB which was earlier
close to 350 KB. It also generated framework.swz and framework.swf.
But I copied only myapp.swf on my web site and not framework.swz.

Still the website works just fine. I also cleared the flash player cache
from here. It works just fine without the .swz file. So my questions are:

Is the framework.swz file actually used or does the flash player have
a copy of it beforehand. And is that copy not cleared by clearing cache of
flash player?

And, even after clearing the cache, I didn't see a request for framework.swz in firebug. Why?