--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -1006,6 +1006,12 @@ class localrepository(repo.repository):
for f in list:
p = self.wjoin(f)
islink = os.path.islink(p)
+ size = os.lstat(p).st_size
+ if size > 10000000:
+ self.ui.warn(_("%s: files over 10MB may cause memory and"
+ " performance problems\n"
+ "(use 'hg revert %s' to unadd the file)\n")
+ % (f, f))
if not islink and not os.path.exists(p):
self.ui.warn(_("%s does not exist!\n") % f)
elif not islink and not os.path.isfile(p):