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Optimize scanning using directory name hint

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As discussed in issue #5440, directory scans are slow when compressed files must be checked against multiple databases. This commit adds support to hint to the scanner that a particular database should be used so that only a single scan is required. If the directory name being scanned matches the database name then that single database is selected.
This commit is contained in:
Aaron Oneal 2017-09-19 16:58:28 -07:00
parent 6ac4486f4d
commit 4a929bd8e2
1 changed files with 29 additions and 0 deletions
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29
tasks/task_database.c
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@ -1115,6 +1115,35 @@ static void task_database_handler(retro_task_t *task)
dbstate->list = dir_list_new_special(
db->content_database_path,
DIR_LIST_DATABASES, NULL);
/* If the scan path matches a database path exactly then
* save time by only processing that database. */
if (dbstate->list && db->is_directory)
{
char *dirname = find_last_slash(db->fullpath) + 1;
for (size_t i = 0; i < dbstate->list->size; i++)
{
char *dbpath = strdup(dbstate->list->elems[i].data);
path_remove_extension(dbpath);
char *dbname = find_last_slash(dbpath) + 1;
if (strcasecmp(dbname, dirname) == 0)
{
free(dbpath);
struct string_list *single_list = string_list_new();
string_list_append(single_list, dbstate->list->elems[i].data,
dbstate->list->elems[i].attr);
dir_list_free(dbstate->list);
dbstate->list = single_list;
break;
}
else
{
free(dbpath);
}
}
}
}
dbinfo->status = DATABASE_STATUS_ITERATE_START;
break;