Implement recommendations from low-level performance study (undocument compress levels 7-9 in the GUI, since they do nothing but increase CPU usage, set the default compress level to 1, and include a note that levels higher than 3 are rarely useful)


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4632 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/vncviewer/parameters.cxx b/vncviewer/parameters.cxx
index c4c8fc7..f88aa5c 100644
--- a/vncviewer/parameters.cxx
+++ b/vncviewer/parameters.cxx
@@ -51,8 +51,8 @@
                                   "Use custom compression level. "
                                   "Default if CompressLevel is specified.", false);
 IntParameter compressLevel("CompressLevel",
-                           "Use specified compression level 0 = Low, 9 = High",
-                           6);
+                           "Use specified compression level 0 = Low, 6 = High",
+                           1);
 BoolParameter noJpeg("NoJPEG",
                      "Disable lossy JPEG compression in Tight encoding.",
                      false);