From bedf65e72ee87e950668d4ed542f05526f0735db Mon Sep 17 00:00:00 2001
From: Brian Koropoff <bkoropoff@gmail.com>
Date: Wed, 8 Nov 2017 18:11:05 -0800
Subject: [PATCH] scanner: prioritize databases with recent matches

This should improve performance when scanning many files
in a row that all match against the same database, which is
the expectation.
---
 tasks/task_database.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tasks/task_database.c b/tasks/task_database.c
index cef5171480..3f3b158bc7 100644
--- a/tasks/task_database.c
+++ b/tasks/task_database.c
@@ -868,6 +868,17 @@ static int database_info_list_iterate_found_match(
    free(db_playlist_base_str);
    free(db_crc);
 
+   /* Move database to start since we are likely to match against it
+      again */
+   if (db_state->list_index != 0)
+   {
+      struct string_list_elem entry = db_state->list->elems[db_state->list_index];
+      memmove(&db_state->list->elems[1],
+              &db_state->list->elems[0],
+              sizeof(entry) * db_state->list_index);
+      db_state->list->elems[0] = entry;
+   }
+
    return 0;
 }