Compling with FB 4 or FB 4.5 doesn't give the same result

I found that compiling the same project either in Flash Builder 4 or Flash Builder 4.5 with the sdk 4.1 doesn't give me the same result.

If compiled 开发者_Go百科with flash builder 4, the resulting swf is 1021 KB. If compiled with fb 4.5, it is 1477 KB.

I used the exact same library, sdk and compiling option in both case.

Anybody has an idea ?

Add

-dump-config myapp-config.xml

to your compiler options and then compare the files. FB4 likely has different defaults for some settings than FB4.5

see the docs for dump-config