According to a ZDNet blog post, OpenOffice.Org 2.0 comes out a resource hog when compared to Microsoft Office.
[W]e can see that OpenOffice.org is indeed a memory and CPU hog. It is literally taking up about 10 times the processing time and memory to just load the application itself along with a blank file. It doesn’t matter how fast the CPU is, 10 times is 10 times and OpenOffice is simply bloated.
Yes, most of us here are FOSS advocates, but it seems disappointing that our beloved office suite doesn’t fare too well against bloatware’s (read: Microsoft) own offering in terms of resource utilization.
Or is this just in Windows?
I, myself, notice that OpenOffice eats up more memory and CPU resources than I think it should be. This should not be an issue for those using higher-end machines, but for the rest of us getting by with just enough power (such as me and my P-II class laptop), efficient resource utilization matters.