X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/b2bd444f31fd9f294ee0dbc4b9a61b1e8c04055c..f8cbf79735bc4588ba6fde12f3855a51efeb7ae8:/doc/todo/optimisations.mdwn

diff --git a/doc/todo/optimisations.mdwn b/doc/todo/optimisations.mdwn
index 924ff8ffa..40ffaf548 100644
--- a/doc/todo/optimisations.mdwn
+++ b/doc/todo/optimisations.mdwn
@@ -1,13 +1,11 @@
-* Render each changed page only once. Currently pages are rendered up to 4
-  times in worst case (8 times if there's an rss feed).
-
-  The issue is that rendering a page is used to gather info like the links
-  on the page that can effect rendering other pages. So it needs a
-  multi-pass system. But rendering the whole page in each pass is rather
-  obscene.
+Ikiwiki has already been optimised a lot, however..
 
 * Don't render blog archive pages unless a page is added/removed. Just
   changing a page doesn't affect the archives as they show only the title.
 
 * Look at splitting up CGI.pm. But note that too much splitting can slow
   perl down.
+
+* The backlinks calculation code is still O(N^2) on the number of pages.
+  If backlinks info were stored in the index file, it would go down to
+  constant time for iterative builds, though still N^2 for rebuilds.