I’m a newcomer just from the end of last year.
I have stored 500 Records (web archives : total 320 MB) with 40 tags in a tree-style.
Today, I noticed EF has ate a bit big size of memory (for me).
EF occupied around 46 MB (after starting) and 62 MB (after opening library). EF ate more and more memory up to 180 MB after importing, tagging, indexing, viewing, … , etc.
After closing EF window (not quitting), this value remained.
Maybe, this is due to my environment, early 2008 iMac (2GB, 10.5.8) with EF 1.4.12, however, I am glad to know that this value is normal for EF?