diff --git a/notes/Copy-and-Patch Compilation.md b/notes/Copy-and-Patch Compilation.md
index e4f52e0..d835968 100644
--- a/notes/Copy-and-Patch Compilation.md	
+++ b/notes/Copy-and-Patch Compilation.md	
@@ -36,8 +36,8 @@ MetaVar constructs the stencil library from programmer defined *stencil generato
 
 At compile time, the compiler iterates over the values of the meta-variables and creates a library entry for every valid combination.
 
-### Stencil Generators
-Stencil generators are templated C++ functions whose template instantiations produce stencils.
+### Compile time
+Stencil generators are templated C++ functions whose template instantiations produce stencils. At "runtime", the generator will perform tree pattern matching to determine the correct variant, then complete a hash table lookup to retrieve the stencil, then copy it to the output.
 
 
 # Terminology