diff --git a/src/calibre/ebooks/lrf/pylrs/pylrs.py b/src/calibre/ebooks/lrf/pylrs/pylrs.py
index 9fcf0ef624..6ee440ce66 100644
--- a/src/calibre/ebooks/lrf/pylrs/pylrs.py
+++ b/src/calibre/ebooks/lrf/pylrs/pylrs.py
@@ -1431,7 +1431,8 @@ class Page(LrsObject, LrsContainer):
 
 
         #print "page contents:", pageContent
-        p.appendLrfTag(LrfTag("ObjectList", pageContent))
+        # ObjectList not needed and causes slowdown in SONY LRF renderer
+        #p.appendLrfTag(LrfTag("ObjectList", pageContent))
         p.appendLrfTag(LrfTag("Link", self.pageStyle.objId))
         p.appendLrfTag(LrfTag("ParentPageTree", lrfWriter.getPageTreeId()))
         p.appendTagDict(self.settings)