Junio noticed the bash completion has been taking a long time lately.
Petr Baudis tracked it down to 72e5e989b ("bash: Add space after
unique command name is completed."). Tracing the code showed
we spent significant time inside of this loop within __gitcomp,
due to the string copying overhead.
[28.146109654] _git common over
[28.164791148] gitrefs in
[28.280302268] gitrefs dir out
[28.300939737] gitcomp in
[28.308378112] gitcomp pre-case
* [28.313407453] gitcomp iter in
* [28.701270296] gitcomp iter out
[28.713370786] out normal
Since __git_refs avoids this string copying by forking and using
echo we use the same trick here when we need to finish generating
the names for the caller.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
Does this make things better? Or worse? I'm not seeing a huge
difference on my own system. Maybe its too fast these days...
contrib/completion/git-completion.bash | 28 ++++++++++++++++------------
1 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 27332ed..61581fe 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -114,9 +114,20 @@ __git_ps1 ()
fi
}
+__gitcomp_1 ()
+{
+ local c IFS=' '$'\t'$'\n'
+ for c in $1; do
+ case "$c$2" in
+ --*=*) printf %s$'\n' "$c$2" ;;
+ *.) printf %s$'\n' "$c$2" ;;
+ *) printf %s$'\n' "$c$2 " ;;
+ esac
+ done
+}
+
__gitcomp ()
{
- local all c s=$'\n' IFS=' '$'\t'$'\n'
local cur="${COMP_WORDS[COMP_CWORD]}"
if [ $# -gt 2 ]; then
cur="$3"
@@ -124,21 +135,14 @@ __gitcomp ()
case "$cur" in
--*=)
COMPREPLY=()
- return
;;
*)
- for c in $1; do
- case "$c$4" in
- --*=*) all="$all$c$4$s" ;;
- *.) all="$all$c$4$s" ;;
- *) all="$all$c$4 $s" ;;
- esac
- done
+ local IFS=$'\n'
+ COMPREPLY=($(compgen -P "$2" \
+ -W "$(__gitcomp_1 "$1" "$4")" \
+ -- "$cur"))
;;
esac
- IFS=$s
- COMPREPLY=($(compgen -P "$2" -W "$all" -- "$cur"))
- return
}
__git_heads ()
--
1.5.6.2.393.g45096
--
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