Question

If I open a file containing 5,000 lines of code and continue to input, I found that my vim became very slow, it displays my input after about 1s.

It even won’t become any better after I start up with --noplugin. But after switching my .vimrc file, everything gets fine again. The .vimrc file is written by myself and after checking for some time, I still can’t locate the error. I have clear all the key maps, but the problem still exists.

So can you give my any advise or tell my how to debug in vim? I found there is a debug option but can’t get how to work.

Answer 1

You can use the --startuptime option when start vim:

--startuptime {fname}                   *--startuptime*
        During startup write timing messages to the file {fname}.
        This can be used to find out where time is spent while loading
        your .vimrc, plugins and opening the first file.
        When {fname} already exists new messages are appended.
        (Only available when compiled with the |+startuptime|
        feature).

Take following steps to diagnose the problem:

• type vim --startuptime log.txt main.java in bash to start vim
• type :tabe log.txt in vim to view the log.