First task was to add support for django-registration 0.8. Originally my plan was to support both 0.7 and 0.8, but that proven to be too complicated so Weblate now requires 0.8, which brings quite a lot of differences in API.
Later I've installed django-debug-toolbar and looked at some bottlenecks in some hot paths. This resulted in few optimizations of translations merging and new caching for translation stats. This turned out to be too expensive for bigger translations and caching these can save few seconds on page load.
I will probably focus more on performance tuning tomorrow as I don't plan to add any new features to 1.2 release.