I've got major performance problem with starting up PyCharm. In my Python environment I have a really big number of modules (OpenGL, twisted and thousands more). Generating skeletons for all of them takes about 2-3 hours, during which all tests included in such modules are launched (OpenGL ones are the most annoying as they block skeleton generation). After this, every time the project is loaded skeletons are updated once more in background (this time it takes about 40 minutes).
My question is: how can I disable such behaviour? It's a major performance issue.