My app has 14.574 blocks and is still usable in terms of lagging 
Tried a few tricks for that:
- tried different browsers and I found that for me the best is Mozilla;
- I always collapse the blocks that I’m not working at that moment. (from @jared `s screen i see tha he does the same
) - Maybe the sistem I’m working on helps me:
- but my internet connection speed definitely helps:
