Vim's autocomplete is excruciatingly slow

Question

Most of the time the autocomplete feature in Vim works nicely for me, but sometimes it seems to be scanning files which the current file references, and then it becomes painfull

Answer 1

Do you have a tags file for the project you're working on? If not try generate one with exuberant-ctags and Vim should pick it up with the taglist pluglin.