8757462a4681a5a060257e7eadcc5672a2aa457e make some compile tasks async, should speed up most builds since compilation now doesn't have to wait for cache writes and flushes can be done in parallel
cd64f98e6378a99c8903ee6e49ab35735f05bbce skip cache read in watch when files were compiled previously, only reason they get compiled again is if they were modified, which means the cache is stale and should not be used. don't need to read it to figure that out.