To highlight the improvement in performance in this procedure: the average void fraction for a 1.2 Å probe radius equals to 0.16 and the average number of symmetric images equals to 5.8 on the CoRE MOF 2019 database (most MOFs present symmetry operations). On average, the "blocking" procedure means that only 16% of the grid points really need to be calculated. The "symmetry" reduces this number of points to 17%, and the combination of both reduces it to only 2.7% of the grid. This leads to a significant reduction in the CPU time of the calculation, as shown in Table .