From Michael Platings, To address performance bottleneck that occurs when using large number of uniforms introduced a name to uniqued ID scheme for Uniforms so comparisons can be done on a uint rather than a string.

include/osg/Uniform

@@ -268,6 +268,9 @@ class OSG_EXPORT Uniform : public Object
         /** Return the internal data array type corresponding to a GLSL type */
         static GLenum getInternalArrayType( Type t );
 
+        /** Return the number that the name maps to uniquely */
+        static unsigned int getNameID(const std::string& name);
+
         /** convenient scalar (non-array) constructors w/ assignment */
         explicit Uniform( const char* name, float f );
         explicit Uniform( const char* name, int i );
@@ -472,6 +475,8 @@ class OSG_EXPORT Uniform : public Object
         inline void setModifiedCount(unsigned int mc) { _modifiedCount = mc; }
         inline unsigned int getModifiedCount() const { return _modifiedCount; }
 
+        /** Get the number that the Uniform's name maps to uniquely */
+        unsigned int getNameID() const;
 
         void apply(const GL2Extensions* ext, GLint location) const;
 
@@ -493,6 +498,8 @@ class OSG_EXPORT Uniform : public Object
 
         Type                _type;
         unsigned int        _numElements;
+        unsigned int        _nameID;
+
 
         // The internal data for osg::Uniforms are stored as an array of
         // getInternalArrayType() of length getInternalArrayNumElements().