Context is: Java EE 5.
I have a server running some huge app. I need to refactor the classes, so that their memory footprint is low (towards lowest possible), in exchange for CPU time (of which there’s plenty).
I already know of ways to use bit operations to stuff multiple booleans, shorts or bites into an int (for example).
I’d need from you other optimization ideas, like, what do i do with Strings, what collections are better to use, and anything else that you happen to know.
Thx,
you guys rule!
This pdf about memory efficiency in java might be of interest to you.
Especially the standard collections seem to be huge memory wasters. But the first step before doing any micro-optimizations would be to profile your application, create heap dumps and analyze these.