Warp Stabilizer has to put every tiny little change it makes into the project file. It is almost certainly the reason your file has grown to enormous size.
But there is any solution but waiting?
I think MBLooks is the culprit, its very cpu intensive as it is not supported by the gpu
Export each clip with warp stabilizer as a lossless intermediate file. Replace the warp stabilized-clip with the intermediate clip. Your export should go a lot faster. Do the same thing for the MB Looks clips.
After the storm I will explain what happend.
I had to wait until morning to have open the project, and there was another complication, Premiere was acting weird and incredibly slow so what I did was save the projec with another different name, and something unexpected occurred, the new project weight was 1.55GB and the first one went down from 2GB to 100MB, thats magic don't you think?....
So after that I created I new project and I imported all the sequences from my first project, I could finish the edit one day later.....
Would be great know from the Adobe people they are into this problem and will be solved in next patches.
Sorry for my english and thank you very much for the responses.
You need to 'bake' your Warp Stabilized shots as explained above by Jeff. Any lag in saving the project file, the size of the project file and the export time is directly related to that. It is recommended only to stabilize footage in the last stages of your edit to ensure a faster workflow.
I had the same problem of 2ergi0 with a Project file that arrives at 7,59Gb!
I didn't use warp stabilizer.
I had colorista II and LUT Buddy.
Once I deleted all the filters (even if they were all off) my project became 3,9Mb! (MEGA not GIGA).
Add a new colorista filter will increase the file size to 4,1 Mb.
With a new LUT Buddy the flie project became 37 Mb.