diff -r 0c4ec6a4e00b code/nel/include/nel/misc/debug.h
--- a/code/nel/include/nel/misc/debug.h	Mon Oct 01 10:08:52 2012 +0200
+++ b/code/nel/include/nel/misc/debug.h	Tue Oct 02 00:20:51 2012 +0200
@@ -478,6 +478,26 @@
 
 #endif // NL_NO_DEBUG
 
+#	ifdef NL_OS_UNIX
+
+#ifndef nllikely
+#	define nllikely(expr) __builtin_expect(!!(expr), true)
+#endif
+#ifndef nlunlikely
+#	define nlunlikely(expr) __builtin_expect(!!(expr), false)
+#endif
+
+#	else // NL_OS_UNIX
+
+#ifndef nllikely
+#	define nllikely(x) (x)
+#endif
+#ifndef nlunlikely
+#	define nlunlikely(x) (x)
+#endif
+
+#	endif // NL_OS_UNIX
+
 #define nlunreferenced(identifier) (identifier)
 
 #define nlstop \
diff -r 0c4ec6a4e00b code/ryzom/client/src/interface_v3/view_radar.cpp
--- a/code/ryzom/client/src/interface_v3/view_radar.cpp	Mon Oct 01 10:08:52 2012 +0200
+++ b/code/ryzom/client/src/interface_v3/view_radar.cpp	Tue Oct 02 00:20:51 2012 +0200
@@ -142,12 +142,13 @@
 	xyzRef.z = 0;
 	mat.translate(-xyzRef);
 
-	float	maxSqrRadius= (float)sqr(_WorldSize/2);
+	const double maxSqrRadius= sqr(_WorldSize/2);
 
-	for (sint32 i = 1; i < 256; ++i)
+	for (uint i = 1; i < 256; ++i)
 	{
 		CEntityCL *entity = EntitiesMngr.entity(i);
-		if (entity == NULL) continue;
+		if (nlunlikely(entity == NULL))
+			continue;
 
 		// if the entity must not be shown in radar
 		if(!entity->getDisplayInRadar())
@@ -156,16 +157,16 @@
 		// get entity pos
 		CVectorD xyz = entity->pos();
 
-		xyz.z = 0;
 		// if the distance is too big so do not display the entity
 		if ((sqr(xyz.x - xyzRef.x)+sqr(xyz.y - xyzRef.y)) > maxSqrRadius) continue;
+		xyz.z = 0;
 
 		// Transform the dot
 		xyz = mat * xyz;
 
 		// Convert to screen
-		sint32 x = OptFastFloor((float)xyz.x);
-		sint32 y = OptFastFloor((float)xyz.y);
+		const sint32 x = OptFastFloor((float)xyz.x);
+		const sint32 y = OptFastFloor((float)xyz.y);
 
 		CRGBA col = entity->getColor();