Maybe i should make a separate thread but i noticed another big problem. After 1-2 hours of setting a test interior scene for some advanced gi test i noticed a severe decrees in speed. From my maya experience i know this kind of thing happens when the history is not cleared. I was having over 300 steps in history and could not find any option to clear that.
You are correct.
Two possible solutions right now. One is to ensure that you are using a 64 bit browser -- everything works better in a 64 bit browser, including speed. The other is that if you do notice it get slow after a long time, just try refreshing the browser -- it should refresh really quickly (a couple seconds) and it should then be fast again if it is a memory issue.
We have done a lot of memory optimizations, but I suspect we need to do more (there must be some memory leaks that are causing the slow down over time.) I just had a look at your scene and it shouldn't be slow, thus it must be a memory leak of some type.