Efficiency

Introduce page.rev_ids, and use
that, wherever possible, instead
of page.revisions.

This avoids fetching the text of
all the revisions. D'oh!

app/controllers/cache_sweeping_helper.rb

@@ -26,7 +26,7 @@ module CacheSweepingHelper
   end
 
   def expire_cached_revisions(page)
-    page.revisions.count.times  do |i|
+    page.rev_ids.count.times  do |i|
       revno = i+1
       expire_action :controller => 'wiki', :web => page.web.address,
           :action => 'revision', :id => page.name, :rev => revno