--- zimlib.orig/src/fileimpl.cpp	2009-08-25 01:47:04.000000000 +0200
+++ zimlib/src/fileimpl.cpp	2009-10-08 13:02:45.000000000 +0200
@@ -43,8 +43,8 @@
   //
   FileImpl::FileImpl(const char* fname)
     : zimFile(fname, std::ios::in | std::ios::binary),
-      direntCache(512),
-      clusterCache(16)
+      direntCache(128),
+      clusterCache(4)
   {
     if (!zimFile)
       throw ZenoFileFormatError(std::string("can't open zim-file \"") + fname + '"');