Commits on Nov 20, 2020

1. Improve performance by ignoring submodules …

   When git status runs in a repo with submodules, it'll recursively run
   git status in every submodule as well by default (sequentially).
   git status is substantially slower on Windows than on Linux. git diff
   behaves similarly to git status in terms of running recursively within
   all submodules. In repos with hundreds of submodules, this quickly adds
   up when git status/diff are called multiple times. Pre-commit runs
   git status once at the beginning of an operation and then runs git diff
   before and after each hook. These calls quickly add up and make
   pre-commit unusable in large repos with lots of submodules.
   
   This commit drastically improves performance in repos with lots of
   submodules and fixes pre-commit#1701 by telling git status and git diff to ignore
   submodules. This change is not expected to have any negative effect on
   existing hooks because each submodule should manage its own hooks
   instead of relying on superproject hooks to manipulate their contents.

   

   Vynce committed Nov 20, 2020
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