Memory consumption with large projects

[Alexander Dymo]

I tried to open a project with roughly 500 000 lines of C code (about 180M on 
disk) and got some strange issues with memory consumption.

During parsing (no persistant storage used):
- 3.8G used right after parser is started and before it showed 1% in the 
progress bar
- it then looked like that memory was free'd and KDevelop started actually to 
parse
- 2.2G occupied after parsing

During loading from persistant store:
- just 200M was used (at any time)


Do those numbers make sense? I'd be most curious to find out why KDev takes so 
much memory.


PS: to reproduce the problem, 
- get ruby sources: ftp://ftp.ruby-lang.org/pub/ruby/snapshot.tar.gz
- build them  (important, as more C code is generated during the build)
- open ruby directory in kdevelop (makefile project)