tf: added value by key lookup optimization using metacache pointers (average speedup of about 4x when evaluating tf scripts)

Author: Oleksiy-Yakovenko

src/main.c

@@ -1112,6 +1112,8 @@ main_cleanup_and_quit (void) {
 
         conf_free ();
 
+        tf_deinit ();
+
         trace ("messagepump_free\n");
         messagepump_free ();
         trace ("plug_cleanup\n");
@@ -1606,6 +1608,7 @@ main (int argc, char *argv[]) {
     _touch (crash_marker);
 #endif
 
+    tf_init ();
     pl_init ();
     conf_init ();
     conf_load (); // required by some plugins at startup

src/plmeta.c

@@ -54,7 +54,23 @@ pl_meta_for_key_with_override (playItem_t *it, const char *key) {
         }
         m = m->next;
     }
-    return NULL;}
+    return NULL;
+}
+
+DB_metaInfo_t *
+pl_meta_for_cached_key (playItem_t *it, const char *key) {
+    pl_ensure_lock ();
+    DB_metaInfo_t *m = it->meta;
+
+    m = it->meta;
+    while (m) {
+        if (key == m->key) {
+            return m;
+        }
+        m = m->next;
+    }
+    return NULL;
+}
 
 
 DB_metaInfo_t *

src/plmeta.h

@@ -72,6 +72,9 @@ pl_meta_for_key (playItem_t *it, const char *key);
 DB_metaInfo_t *
 pl_meta_for_key_with_override (playItem_t *it, const char *key);
 
+DB_metaInfo_t *
+pl_meta_for_cached_key (playItem_t *it, const char *key);
+
 int
 pl_get_meta_with_override (playItem_t *it, const char *key, char *val, size_t size);