a914cfb754
Backout commit b2f301f73c First of all, it caused flicker (which is caused by a Vim bug: https://groups.google.com/d/msg/vim_dev/fdgPqmYZwOk/KJzR4l9wAwAJA) and then the cache was not reset when editing a new file. So let's just revert that commit, although it does affect performance. fixes #1499