thodg/libgit2

2016-11-23T18:32:55

Skip submodule head/index update when caching. `git_submodule_status` is very slow, bottlenecked on `git_repository_head_tree`, which it uses through `submodule_update_head`. If the user has requested submodule caching, assume that they want this status cached too and skip it. Signed-off-by: David Turner <dturner@twosigma.com>