>From the output of ls-files, we remove all but the leftmost path
component and then we eliminate duplicates. We do this in a while loop,
which is a performance bottleneck when the number of iterations is large
(e.g. for 60000 files in linux.git).
$ COMP_WORDS=(git status -- ar) COMP_CWORD=3; time _git
real 0m11.876s
user 0m4.685s
sys 0m6.808s
Using an equivalent sed script improves performance significantly:
$ COMP_WORDS=(git status -- ar) COMP_CWORD=3; time _git
real 0m1.372s
user 0m0.263s
sys 0m0.167s
The measurements were done with mingw64 bash, which is used by Git for
Windows.
Signed-off-by: Clemens Buchacher <drizzd@xxxxxxx>
---
contrib/completion/git-completion.bash | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 6da95b8..e3ddf27 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -384,12 +384,7 @@ __git_index_files ()
local root="${2-.}" file
__git_ls_files_helper "$root" "$1" |
- while read -r file; do
- case "$file" in
- ?*/*) echo "${file%%/*}" ;;
- *) echo "$file" ;;
- esac
- done | sort | uniq
+ sed -e '/^\//! s#/.*##' | sort | uniq
}
# Lists branches from the local repository.
--
2.7.4
