I get huge continues Fps drop in minecraft, When in the newest snapshot my minecraft drops to 20 - 10 Fps depending on the settings. but never seems to go above that much.
When I got back to that same world (same computer enviroment) but then using 1.6.2 I get my old Fps back which is around 100 - 50 Fps.
and this is on better settings then using the snapshot.
I have included in text files both Console output for each time loading a version. and loading the same world.
I also included a gallery on imgur, which displays the settings I used for both version and the result of that.
I do know the snapshot version says 13w38b, but I have tested this in the 'c' snapshot as well and same result though a little note:
when I make the actually window of minecraft smaller on my screen to say half of my screen, the fps goes up. and turning advanced OpenGL off increases my Fps with about +10
The Gallery: http://imgur.com/a/bW4nQ
I know this bugreport might be a duplicate but I was not sure, since I have no clue what is actually causing this preformance gapt. and thus I don't know if what I have done is similiar to some ones else bugreport.
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Framerate lag is not a bug.
so you do know how to fix this?
It is a bug when it makes minecraft almost unplayable when switching versions.
just want to say that I am still experiencing in the newest snapshot, I added it to the affected list.

Hm, yeah, but this is a duplicate. Report it over at MC-31688
hmm odd, I think you had a different problem than I had. Do you see the memory in the f3 menu becoming more and more?
Yes, around to 300mb then drops to 150 mb and starts to count up again
yeah I had the same but for me it kept counting upwards until I had 3000 or something.
I think I figured out already what my problem is, it's MC-11834 it has nothing to do with this bug
Same over here, the average fps is significantly less than in 1.6 from 170 to around 40 and every 5 seconds or so my screen just freezes