http://beta.scratch.mit.edu/projects/10070237/

Bug:
Using broadcast and wait within a Block set to run without screen refresh causes a massive pause and then very low framerate afterwards as if it were waiting for the next frame.

Expected Behaviour:
Should run without framerate impact, broadcasts should be executed without screen refresh and after all broadcasts are done focus should return to after the broadcast and wait block.

Similar effects happen with blocks that wait, eg. the note blocks and wait blocks but those are actually time based and should probably be handled differently (maybe they should silently fail?)