Population sizes of 16, 20, 24, 28, 32, 48, 72, and 96 individuals are examined. Figure shows that for all population sizes, the median champion was 1, meaning in a majority of runs it found the global optimum. However, the standard deviation is much larger for a population size of 16. When examining the performance among the chemical properties (ESI Table ), all population sizes performed well for maximizing polarizability. For optical bandgap and solvation ratio, although some runs were able to find the global best polymer, many runs did not. The champions among the runs that did not find the global optimum had a better rank as the population size increased.