This is due to the encoding of the group information in the binary string, and a grouping parameter of type VARCHAR requires potentially more space than a simple INTEGER value.
Grouping Genetic Algorithms; module; disassembly cost; space interference matrix.
集群基因演算法；模组化；拆解成本；空间干涉矩阵。
3
Clean the drawer out first, of course, and put the very small pile of things you chose back in the drawer, grouping like things together and leaving space around the groups.