Though one of the nice things about using indexes is that you can lookup multiple arrays with the same index. This can be very useful for performance to break u

Though one of the nice things about using indexes is that you can lookup multiple arrays with the same index. This can be very useful for performance to break up a large data structure into smaller ones (e.g. to fit more elements in a cache line when you only use a subset of the structure for a complex operation) whilst still keeping their relationship intact. Further it’s also useful for all the reasons a relational database is in terms of querying data relationships.