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authorAaron Griffin <aaronmgriffin@gmail.com>2007-11-06 00:55:45 -0600
committerAaron Griffin <aaronmgriffin@gmail.com>2007-11-06 22:47:10 -0600
commit2ee90ddae23dd86c68223c0d6c49f0b92d62429d (patch)
tree050a4d45e7e56c5a860df533cf4557f34de8416d /lib/libalpm/remove.c
parentbdab234d977dd2e9417a39f5191e495d5c460ee7 (diff)
Maintain list tail pointers in the head node
List head nodes contain null 'prev' pointer, which we can (ab)use to maintain a back reference to the tail pointer of the list. While list additions are not _significantly_ improved, they are still sped up. Original $ time pacman -Qo /usr/bin/wtpt /usr/bin/wtpt is owned by lcms 1.17-2 real 0m3.623s user 0m1.883s sys 0m1.473s New $ time pacman -Qo /usr/bin/wtpt /usr/bin/wtpt is owned by lcms 1.17-2 real 0m2.006s user 0m0.263s sys 0m1.627s Signed-off-by: Aaron Griffin <aaronmgriffin@gmail.com>
Diffstat (limited to 'lib/libalpm/remove.c')
-rw-r--r--lib/libalpm/remove.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/libalpm/remove.c b/lib/libalpm/remove.c
index 6bbb4655..a4c3c15c 100644
--- a/lib/libalpm/remove.c
+++ b/lib/libalpm/remove.c
@@ -304,7 +304,8 @@ int _alpm_remove_commit(pmtrans_t *trans, pmdb_t *db)
_alpm_log(PM_LOG_DEBUG, "removing %d files\n", filenum);
/* iterate through the list backwards, unlinking files */
- for(lp = alpm_list_last(files); lp; lp = lp->prev) {
+ files = alpm_list_reverse(files);
+ for(lp = files; lp; lp = alpm_list_next(lp)) {
unlink_file(info, lp, trans);
/* update progress bar after each file */