Performance-and-memory-optimization.md

@@ -55,7 +55,17 @@ But later once using the *BufferGeometry* versions of the primitives I realized
 
 ### Reusing 3D objects attributes (geometry, materials, etc) for atoms and bonds 
 
-(memory) `PENDING`
+(memory) 
+
+All the bonds meshes need the same material configuration, so one only Material object can be shared for them. Specially interesting for structures with high number of bonds per atom.
+
+Example of memory reduction:
+
+**CdSrTa.in** structure (12 atoms, 62 bonds) -> supercell 5x5x5 (1500 atoms, 7870 bonds). 
+
+Memory use change: 300M/200M -> 240M/140M (after the optimization)
+
+`PENDING` for atoms
 
 ### Optimizing the operations with single or few structure elements