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

vncviewer/OptionsDialog.cxx

@@ -511,7 +511,7 @@ void OptionsDialog::createCompressionPage(int tx, int ty, int tw, int th)
 
   compressionInput = new Fl_Int_Input(tx + INDENT, ty,
                                       INPUT_HEIGHT, INPUT_HEIGHT,
-                                      _("level (1=fast, 9=best)"));
+                                      _("level (1=fast, 6=best [4-6 are rarely useful])"));
   compressionInput->align(FL_ALIGN_RIGHT);
   ty += INPUT_HEIGHT + INNER_MARGIN;
 

vncviewer/parameters.cxx

@@ -51,8 +51,8 @@ BoolParameter customCompressLevel("CustomCompressLevel",
                                   "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);