Use lrudecorator to memoize wp_load_article lookups

Reading profiling data on wp_load_article points to
wp.wp_load_article() being called many times, and being
slow.

This patch gives us radical speedups on cached stuff, and modest
cache results.

Andorra goes from 15.5s to 14.5s cold-cache. Once the cache is seeded
it returns in 0.7s.

2 files changed, 10 insertions, 6 deletions

diff --git a/mwlib/expander.py b/mwlib/expander.py
index 6298c7f..e5e4049 100755
--- a/mwlib/expander.py
+++ b/mwlib/expander.py
@@ -10,6 +10,7 @@ import re
 import os
 from mwlib import magics
 import mwlib.log
+from pylru import lrudecorator
 
 DEBUG = "DEBUG_EXPANDER" in os.environ
 
@@ -424,6 +425,7 @@ class Expander(object):
             for line in f.readlines():
                 self.blacklist.add(line.rstrip().decode('utf8'))
 
+    @lrudecorator(100)
     def getParsedTemplate(self, name):
         if name.startswith("[["):
             return None
@@ -435,10 +437,6 @@ class Expander(object):
             if len(name) > 1:
                 name = name[0].capitalize() + name[1:]
                 name = "Plantilla:" + name
-                try:
-                    return self.parsedTemplateCache[name]
-                except KeyError:
-                    pass
 
             # Check to see if this is a template in our blacklist --
             # one that we don't want to bother rendering.
@@ -463,7 +461,6 @@ class Expander(object):
                 print "TEMPLATE:", name, repr(raw)
                 res.show()
                 
-        self.parsedTemplateCache[name] = res
         return res
             
         
diff --git a/server.py b/server.py
index 406d45b..9b301be 100755
--- a/server.py
+++ b/server.py
@@ -37,6 +37,7 @@ import tempfile
 import re
 import wp
 import xml.dom.minidom
+from pylru import lrudecorator
 
 # Uncomment to print out a large dump from the template expander.
 #os.environ['DEBUG_EXPANDER'] = '1'
@@ -110,7 +111,7 @@ class WPWikiDB:
                 article_text = ""
                 break
 
-            article_text = unicode(wp.wp_load_article(title.encode('utf8')), 'utf8')
+            article_text = unicode(wp_load_article(title.encode('utf8')), 'utf8')
             
             # To see unmodified article_text, uncomment here.
             # print article_text
@@ -763,6 +764,12 @@ def load_db(dbname):
         dbname + '.locate.prefixdb',
         dbname + '.blocks.db')
 
+# Cache articles and specially templates
+@lrudecorator(100)
+def wp_load_article(title):
+    
+    return wp.wp_load_article(title)
+
 def run_server(confvars):
     index = ArticleIndex('%s.index.txt' % confvars['path'])