index comparison to the filesystem data in parallel, allowing
overlapping IO's. Defaults to true.
+core.unsetenvvars::
+ Windows-only: comma-separated list of environment variables'
+ names that need to be unset before spawning any other process.
+ Defaults to `PERL5LIB` to account for the fact that Git for
+ Windows insists on using its own Perl interpreter.
+
core.createObject::
You can set this to 'link', in which case a hardlink followed by
a delete of the source are used to make sure that object creation