while reading the release notes of git 2.11 I noticed a cool new feature has been merged:

If the filter command (a string value) is defined via filter.<driver>.process then Git can process all blobs with a single filter invocation for the entire life of a single Git command.

see the git documentation.

This has been developed in the context of git-lfs (see PR 1382).

If I understand correctly how it works this could speed up v6 repos. Looking at the history/website of git-annex there doesn't seem to be yet any work on this so I though it was worth calling the attention on the feature.

Thanks a lot for all the work on git-annex, it's a really amazing project! The more I study it the more cool features I discover :)