--- a/emacs.rst	Sun Oct 11 21:52:39 2009 +0300
+++ b/emacs.rst	Mon Oct 12 19:46:38 2009 +0300
@@ -50,6 +50,12 @@
 error 'No error until here' when reloading the file, move the expression
 towards the back of the file, otherwise towards the front of the file.
 
+** Call tree.
+
+Before byte compiling file execute
+
+  (setq byte-compile-generate-call-tree t)
+
 * WWW.
 
 ** Text based WWW browser.