Speed up emms-play-directory-tree by about factor 10

Most of the speedup comes from using nconc in later-do instead
of append (and therefore, not excessively copying lists).
I see a factor of 10 speedup when generating the playlist
for 37000 audio files.

darcs-hash:20070221140553-08870-162cb94182e5e4947a0972a67b9229db8899e7cd.gz

1 files changed, 2 insertions, 2 deletions

diff --git a/emms.el b/emms.el
index 71e4529..6a2f8cd 100644
--- a/emms.el
+++ b/emms.el
@@ -1344,11 +1344,11 @@ or negative to seek backwards."
 ;; This is a simple helper data structure, used by both players
 ;; and tracks.
 
-(defun emms-dictionary (name)
+(defsubst emms-dictionary (name)
   "Create a new dictionary of type NAME."
   (list name))
 
-(defun emms-dictionary-type (dict)
+(defsubst emms-dictionary-type (dict)
   "Return the type of the dictionary DICT."
   (car dict))