diff problem

[Tim Armstrong]

Hi,
I recently attempted to commit a 5.3 MB file with 5.7 MB worth of 
changes to its most recent revision (which was 5.1 MB in size). The 
commit failed and as I further investigated the cause I discovered that 
hg diff also fails after about 40 seconds by simply exiting without 
giving an error message. If I simply delete half of the new file for 
testing purposes the diff succeeds. The exact file size at which it 
fails seems to vary though so it doesn't seem like a problem with the 
file content.
I found this message on the mercurial list 
http://marc.info/?l=mercurial&m=117499200905031&w=2 but am unsure 
whether lack of memory if the cause of my problem as the file sizes do 
not seem excessive (especially compared to the sizes that other folks on 
the list mention having problems with) and I am able to get a diff from 
the diff program as well as kdiff3 and meld.
I would appreciate any thoughts or insight,
Sincerely,
Tim