--- a/par2creatorsourcefile.cpp
+++ b/par2creatorsourcefile.cpp
@@ -213,21 +213,22 @@ bool Par2CreatorSourceFile::Open(CommandLine::NoiseLevel noiselevel, const Comma
         }
       }
 
+      // Define MPDL to skip reporting; speeds up things considerably
+#ifndef MPDL
       if (noiselevel > CommandLine::nlQuiet)
       {
         // Display progress
         u32 oldfraction = (u32)(1000 * offset / filesize);
-        offset += want;
-        u32 newfraction = (u32)(1000 * offset / filesize);
+		// The original source had here: offset += want;
+		// That's definitely an error, because offset must always be incremented!
+        u32 newfraction = (u32)(1000 * (offset + want) / filesize);
         if (oldfraction != newfraction)
         {
           cout << newfraction/10 << '.' << newfraction%10 << "%\r" << flush;
         }
       }
-      else
-      {
-        offset += want;
-      }
+#endif
+      offset += want;
     }
 
     // Did we finish the last block