The configuration variables in the 'imap' section are described
in linkgit:git-imap-send[1].
+index.threads::
+ Specifies the number of threads to spawn when loading the index.
+ This is meant to reduce index load time on multiprocessor machines.
+ Specifying 0 or 'true' will cause Git to auto-detect the number of
+ CPU's and set the number of threads accordingly. Specifying 1 or
+ 'false' will disable multithreading. Defaults to 'true'.
+
index.version::
Specify the version with which new index files should be
initialized. This does not affect existing repositories.