I have some problems with my GIMP recently. When I start GIMP it runs perfectly fine, but over time, say about 15 minutes, it's starting to slow down my Ubuntu (14.04). After checking my system resources I figured out that GIMP is not using much CPU as I initially thought, but rather uses up all the RAM (90% or more). After closing GIMP, the RAM usage drops significantly and the computer speed regenerates. I'm not sure why this is, maybe because I copy-paste a lot and it saves the copied images in the RAM temporarily. Now to my questions:
Does anyone else have this problem, know what the actual problem is or know how to fix it? (e.g. allowing GIMP to use not more than 50% of my RAM)