+# If 0 is passed then everything is undeltafied. Limiting the delta
+# depth is meaningful for subsequent access performance to old revisions.
+# A value of 16 might be a good compromize between performance and good
+# space saving. Current default is unbounded.
+#
+# The --max-behind=30 argument is passed to git-mkdelta so to keep
+# combinations and memory usage bounded a bit. If you have lots of memory
+# and CPU power you may remove it (or set to 0) to let git-mkdelta find the
+# best delta match regardless of the number of revisions for a given file.
+# You can also make the value smaller to make it faster and less
+# memory hungry. A value of 5 ought to still give pretty good results.
+# When set to 0 or ommitted then look behind is unbounded. Note that
+# git-mkdelta might die with a segmentation fault in that case if it
+# runs out of memory. Note that the GIT repository will still be consistent
+# even if git-mkdelta dies unexpectedly.