Oh gawd this is gonna conflict with Shyotl..

but you people wanted Render Weight for some reason... so here it is...
Now we'll send it to the server, rejoice.

indra/newview/CMakeLists.txt

@@ -123,6 +123,7 @@ set(viewer_SOURCE_FILES
     llautoreplace.cpp
     llavataractions.cpp
     llavatarpropertiesprocessor.cpp
+    llavatarrenderinfoaccountant.cpp
     llbox.cpp
     llcallbacklist.cpp
     llcallingcard.cpp
@@ -654,6 +655,7 @@ set(viewer_HEADER_FILES
     llautoreplace.h
     llavataractions.h
     llavatarpropertiesprocessor.h
+    llavatarrenderinfoaccountant.h
     llbox.h
     llcallbacklist.h
     llcallingcard.h

indra/newview/app_settings/settings.xml

@@ -14117,6 +14117,17 @@ This should be as low as possible, but too low may break functionality</string>
     <integer>0</integer>
   </map>
 
+  <key>RenderAutoMuteLogging</key>
+  <map>
+    <key>Comment</key>
+    <string>Show extra information in viewer logs about avatar rendering costs</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
   <key>RenderAutoHideSurfaceAreaLimit</key>
   <map>
     <key>Comment</key>

indra/newview/llappviewer.cpp

@@ -89,6 +89,7 @@
 #include "llcrashlogger.h"
 #include "llweb.h"
 #include "llsecondlifeurls.h"
+#include "llavatarrenderinfoaccountant.h"
 
 // Linden library includes
 #include "llavatarnamecache.h"
@@ -4192,6 +4193,9 @@ void LLAppViewer::idle()
 		gObjectList.updateApparentAngles(gAgent);
 	}
 
+	// Update AV render info
+	LLAvatarRenderInfoAccountant::idle();
+
 	// Execute deferred tasks.
 	{
 		LAZY_FT("DeferredTaskRun");