Performance-and-memory-optimization.md

@@ -31,7 +31,10 @@ The last column is a more aggressive segment reduction that can make sense for h
 
 The percentages represent the final number of vertices relating to the initial one.
 
-I've also reduce the *radialSegments* of bonds geometry but in this case the gain is small (the number of vertices per bond is smaller and fixed)
+I've also reduce the *radialSegments* of bonds geometry but in this case the gain is small (the number of vertices per bond is smaller and fixed).
+
+The final implementation add a new variable (the size of the structure, number of atoms) to determine the segments number of the atoms geometry, this is the expression:
+`const nSegments = 5 + Math.ceil(15*(1 - numAtoms/2500)*radius)`