Cache filter results so we don't run all OP filters twice.

src/Filtering/Filter.coffee

@@ -1,5 +1,6 @@
 Filter =
   filters: {}
+  results: {}
   init: ->
     return unless g.VIEW in ['index', 'thread'] and Conf['Filter']
 
@@ -107,6 +108,7 @@ Filter =
       settings
 
   test: (post, hideable=true) ->
+    return post.filterResults if post.filterResults
     hl  = undefined
     top = false
     for key of Filter.filters when ((value = Filter[key] post)?)

src/General/Index.coffee

@@ -595,7 +595,7 @@ Index =
     for data in Index.liveThreadData
       Index.liveThreadDict[data.no] = data
       Index.parsedThreads[data.no] = obj = Build.parseJSON data, g.BOARD.ID
-      results = Filter.test obj
+      obj.filterResults = results = Filter.test obj
       obj.isOnTop  = results.top
       obj.isHidden = results.hide
     if Index.liveThreadData[0]
@@ -624,7 +624,9 @@ Index =
           threads.push thread
 
         if not ((OP = thread.OP) and not OP.isFetchedQuote)
-          OP = new Post Build.postFromObject(threadData, g.BOARD.ID, true), thread, g.BOARD
+          obj = Index.parsedThreads[threadData.no]
+          OP = new Post Build.post(obj, true), thread, g.BOARD
+          OP.filterResults = obj.filterResults
           posts.push OP
         thread.setPage i // Index.threadsNumPerPage + 1