Re: Hideously slow VC status queries fixed

[Richard Stallman]

    After a few minutes I got this:

        Warning (undo): Buffer `gcc' undo info was 3023389 bytes long.
        The undo info was discarded because it exceeded `undo-outer-limit'.

This probably means there is some buffer or some operation in which 
undo should be turned off entirely.  For instance, when vc-dired
fills the buffer with information, it may as well have undo turned
off during that.