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authorNagy Gabor <ngaba@bibl.u-szeged.hu>2008-01-10 15:33:09 +0100
committerDan McGee <dan@archlinux.org>2008-01-12 18:05:52 +0100
commit633dbeac88316f71f0f5642b4b8b00cc6d262919 (patch)
treee907c4e890f88de411d17dac15e27c72c92b5ef9 /lib/libalpm
parente654236db6b01d21cff7c850efedff183dd86b61 (diff)
downloadpacman-633dbeac88316f71f0f5642b4b8b00cc6d262919.tar.gz
pacman-633dbeac88316f71f0f5642b4b8b00cc6d262919.tar.xz
small checkdeps speed-up
In the old code 'alpm_list_diff(_alpm_db_get_pkgcache(db), dblist, _alpm_pkg_cmp);' was slow. Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu> [Xav: In my opinion, computing both dblist and modified in one for loop also makes the code clearer, besides being more efficient. Also renamed joined to targets since I also find that clearer.] Signed-off-by: Chantry Xavier <shiningxc@gmail.com>
Diffstat (limited to 'lib/libalpm')
-rw-r--r--lib/libalpm/deps.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index 8d77fd46..8c302b69 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -226,7 +226,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
alpm_list_t *remove, alpm_list_t *upgrade)
{
alpm_list_t *i, *j;
- alpm_list_t *joined, *dblist;
+ alpm_list_t *targets, *dblist = NULL, *modified = NULL;
alpm_list_t *baddeps = NULL;
pmdepmissing_t *miss = NULL;
@@ -236,9 +236,16 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
return(NULL);
}
- joined = alpm_list_join(alpm_list_copy(remove), alpm_list_copy(upgrade));
- dblist = alpm_list_diff(_alpm_db_get_pkgcache(db), joined, _alpm_pkg_cmp);
- alpm_list_free(joined);
+ targets = alpm_list_join(alpm_list_copy(remove), alpm_list_copy(upgrade));
+ for(i = _alpm_db_get_pkgcache(db); i; i = i->next) {
+ void *pkg = i->data;
+ if(alpm_list_find(targets, pkg, _alpm_pkg_cmp)) {
+ modified = alpm_list_add(modified, pkg);
+ } else {
+ dblist = alpm_list_add(dblist, pkg);
+ }
+ }
+ alpm_list_free(targets);
/* look for unsatisfied dependencies of the upgrade list */
for(i = upgrade; i; i = i->next) {
@@ -267,9 +274,6 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
if(reversedeps) {
/* reversedeps handles the backwards dependencies, ie,
* the packages listed in the requiredby field. */
-
- alpm_list_t *modified = alpm_list_diff(_alpm_db_get_pkgcache(db), dblist, _alpm_pkg_cmp);
-
for(i = dblist; i; i = i->next) {
pmpkg_t *lp = i->data;
for(j = alpm_pkg_get_depends(lp); j; j = j->next) {
@@ -290,8 +294,8 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
}
}
}
- alpm_list_free(modified);
}
+ alpm_list_free(modified);
alpm_list_free(dblist);
return(baddeps);