Disable ComparingUpdateTracker by default for now, because it generates a lot of CPU overhead (let's see if anyone notices that it's gone)

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4633 3789f03b-4d11-0410-bbf8-ca57d06f2519

common/rfb/ServerCore.cxx

@@ -50,7 +50,7 @@ rfb::IntParameter rfb::Server::clientWaitTimeMillis
 rfb::BoolParameter rfb::Server::compareFB
 ("CompareFB",
  "Perform pixel comparison on framebuffer to reduce unnecessary updates",
- true);
+ false);
 rfb::BoolParameter rfb::Server::protocol3_3
 ("Protocol3.3",
  "Always use protocol version 3.3 for backwards compatibility with "