1.0.3: Huge Performance drop after 15-20 min of playing

[Voggla]

Version:
1.0.3

What is the bug:
A few days ago I started playing FTB Direwolf20 and am right now still in early game (only 3 basic machines) and when I start up the game I get around 120fps. The game is stable but over the time the fps drop to 60-70 fps which is still ok and playable. But then after like 15-20min of playing my framerates suddenly drop to 15-20 fps and it gets unplayable. I have quiet a good pc and have optifine and fastcraft installed. I also already tried disabling journey map because i heard it might be source of the problem but it wasnt. The only thing that helps is relaunching the game which gets really annoying. I hope someone can help me.

Thanks,
Voggla

(Sorry for possible misspellings english isnt my mother tongue)

Mod & Version:


Paste.feed-the-beast.com log:


Can it be repeated:


Known Fix:

Edit: I think I solved it. My java version was really outdated which caused memory leaks during dimension swapping or other fps intense things like rain (splash particles). After updating my game stays stable

 

[10pm]

A problem could be memory leak when swapping dimensions, but even if you're not doing that it's kinda normal, to me at least

 

[Voggla]

would increasing the ram help im running it with 2gb right now
and yes i have enough ram to do so

Edit: Found solution, see main post ^

 

[10pm]

To which version did you update to?