We now use three mkdocs-git-*-plugins and the execution time is greatly increased by these plugins. This is particularly noticeable during mkdocs serve.
I discovered the enabled_on_serve option at @squidfunk info plugin and implemented this in (my) plugin:
tombreit/mkdocs-git-latest-changes-plugin@f467fec
Would this also be something for mkdocs-git-authors-plugin?