From 68e276cc19f796c905dd886d9222c2ef3db13c39 Mon Sep 17 00:00:00 2001
From: Michal Koutný <mkoutny@suse.com>
Date: Feb 21 2023 18:12:48 +0000
Subject: scripts/renamepatches: Optimize search


Use bash hashmap instead of grepping list file.

sample:
5.0s -> 2.5s

Composed result with previous commit on SLE15-SP4->SLE15-SP5:
original
Executed in  207.82 secs    fish           external
   usr time  263.64 secs  459.00 micros  263.64 secs
   sys time   60.61 secs  185.00 micros   60.61 secs

optimized
Executed in   65.73 secs    fish           external
   usr time   49.16 secs  639.00 micros   49.16 secs
   sys time   18.52 secs    0.00 micros   18.52 secs

---

diff --git a/scripts/renamepatches b/scripts/renamepatches
index fa2b5bc..8292b69 100755
--- a/scripts/renamepatches
+++ b/scripts/renamepatches
@@ -29,15 +29,20 @@ fi
 branch=$1
 trap 'rm -f "$temp"' EXIT
 temp=$(mktemp)
-git grep -iE '^(Git-commit:|No-fix:|\(cherry picked from commit)' $branch | grep -vF patches.kernel.org > $temp
+git grep -iE '^(Git-commit:|No-fix:|\(cherry picked from commit)' $branch | tr ':' ' ' | \
+		awk '!/patches.kernel.org/ {fn=$2; hash=$NF; map[hash]=map[hash] fn;}
+		      END				   { for (hash in map) printf("map[%s]=\"%s\"\n", hash, map[hash]); }' \
+		>$temp
+
+declare -A map
+source $temp
 
 grep -E "^[[:space:]]*patches\.[a-z]+\/" < series.conf | while read patch ; do
 	[ ! -f "$patch" ] && continue
 	commit="$(awk -v IGNORECASE=1 '/^(Git-commit|No-fix):/ { print $2}
 	/^\(cherry picked from commit/ { print $5}' $patch)"
-	[ -n "$commit" ] && echo "$commit" | while read c ; do
-	       grep -F $c < $temp | tr ':' ' ' | while read junk fn blah ; do
-	            [ -n "$fn" ] && [ $fn != $patch ] && git mv $patch  $fn && sed -i -e "s,$patch,$fn," series.conf
-       done
-   done
+	[ -z "$commit" ] && continue
+	for fn in ${map[$commit]} ; do
+		[ $fn != $patch ] && git mv $patch  $fn && sed -i -e "s,$patch,$fn," series.conf
+	done
 done