The block size for the comparing update tracker was inefficently low. Raising

it from 16 to 64 pixels significantly reduces the CPU overhead in many cases,
without sacrificing much in what it detects.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4810 3789f03b-4d11-0410-bbf8-ca57d06f2519

common/rfb/ComparingUpdateTracker.cxx

@@ -35,7 +35,7 @@ ComparingUpdateTracker::~ComparingUpdateTracker()
 }
 
 
-#define BLOCK_SIZE 16
+#define BLOCK_SIZE 64
 
 bool ComparingUpdateTracker::compare()
 {