AFAIK Vim 7 has a different way of handling undo levels. Have you tried with Vim 6 instead? I had used Vim 6 to edit a text file (3Gbytes) and do things within seconds.
-- Sincerely, Pan, Shi Zhu. ext: 2606 Robert Maxwell Robinson <[EMAIL PROTECTED]> 写于 2007-05-23 05:59:20: > > ":set undolevels=-1" caused my test to run in less than 15 sec, with no > other options fiddled with. Thanks Tim, now I have a work-around! > > Now, does having the undo facility available _necessarily_ mean deleting a > large chunk of a file takes so long, or can that be added to the list of > desired performance enhancements? > > Max > > On Tue, 22 May 2007, Tim Chase wrote: > > > The issue of editing large files comes up occasionally. A few settings can > > be tweaked to vastly improve performance. Notably, the 'undolevels' > > setting can be reduced to -1 or 0 for improved performance. If your lines > > are long, it can also help to disable syntax highlighting as well. You can > > drop in on one such thread here: > >