From 3863e48788e2424c4f1469e72dabda6fba595c4c Mon Sep 17 00:00:00 2001 From: Dan McGee Date: Fri, 21 Jan 2011 10:11:59 -0600 Subject: Add a likely_pkg hint argument to sync_db_read In most (all?) cases, we will process all files for a given sync database entry sequentially. The code currently does an _alpm_pkg_find() for every file in the database, but we had the "current" package readily available. Shift some local variables around a bit to expose this to sync_db_read() and use it if the package is the correct one. On my system, this cuts calls to _alpm_pkg_find() from 20,769 to 10,349 calls during a -Qu operation, and results in a ~30% speedup of the same operation (0.35 sec -> 0.27 sec). This benefit should be apparent anywhere we read in the full contents of the sync databases. Signed-off-by: Dan McGee --- lib/libalpm/be_sync.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) (limited to 'lib/libalpm') diff --git a/lib/libalpm/be_sync.c b/lib/libalpm/be_sync.c index b11499c4..1e4b2fde 100644 --- a/lib/libalpm/be_sync.c +++ b/lib/libalpm/be_sync.c @@ -142,13 +142,15 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db) } /* Forward decl so I don't reorganize the whole file right now */ -static int sync_db_read(pmdb_t *db, struct archive *archive, struct archive_entry *entry); +static int sync_db_read(pmdb_t *db, struct archive *archive, + struct archive_entry *entry, pmpkg_t *likely_pkg); static int sync_db_populate(pmdb_t *db) { int count = 0; struct archive *archive; struct archive_entry *entry; + pmpkg_t *pkg = NULL; ALPM_LOG_FUNC; @@ -169,12 +171,12 @@ static int sync_db_populate(pmdb_t *db) while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) { const struct stat *st; - const char *name; - pmpkg_t *pkg; st = archive_entry_stat(entry); if(S_ISDIR(st->st_mode)) { + const char *name; + pkg = _alpm_pkg_new(); if(pkg == NULL) { archive_read_finish(archive); @@ -208,7 +210,7 @@ static int sync_db_populate(pmdb_t *db) count++; } else { /* we have desc, depends or deltas - parse it */ - sync_db_read(db, archive, entry); + sync_db_read(db, archive, entry, pkg); } } @@ -236,10 +238,11 @@ static int sync_db_populate(pmdb_t *db) f = alpm_list_add(f, linedup); \ } while(1) /* note the while(1) and not (0) */ -static int sync_db_read(pmdb_t *db, struct archive *archive, struct archive_entry *entry) +static int sync_db_read(pmdb_t *db, struct archive *archive, + struct archive_entry *entry, pmpkg_t *likely_pkg) { - const char *entryname = NULL; - char *filename, *pkgname, *p, *q; + const char *entryname = NULL, *filename; + char *pkgname, *p, *q; pmpkg_t *pkg; struct archive_read_buffer buf; @@ -268,13 +271,17 @@ static int sync_db_read(pmdb_t *db, struct archive *archive, struct archive_entr STRDUP(pkgname, entryname, RET_ERR(PM_ERR_MEMORY, -1)); p = pkgname + strlen(pkgname); for(q = --p; *q && *q != '/'; q--); - STRDUP(filename, q+1, RET_ERR(PM_ERR_MEMORY, -1)); + filename = q + 1; for(p = --q; *p && *p != '-'; p--); for(q = --p; *q && *q != '-'; q--); *q = '\0'; /* package is already in db due to parsing of directory name */ - pkg = _alpm_pkg_find(db->pkgcache, pkgname); + if(likely_pkg && strcmp(likely_pkg->name, pkgname) == 0) { + pkg = likely_pkg; + } else { + pkg = _alpm_pkg_find(db->pkgcache, pkgname); + } if(pkg == NULL) { _alpm_log(PM_LOG_DEBUG, "package %s not found in %s sync database", pkgname, db->treename); @@ -366,7 +373,6 @@ static int sync_db_read(pmdb_t *db, struct archive *archive, struct archive_entr error: FREE(pkgname); - FREE(filename); /* TODO: return 0 always? */ return(0); } -- cgit v1.2.3-24-g4f1b