Question abour increasing tuple limit in wildcard table

[pudelkoM]

Here the number of unique tuples is limited to 8: https://github.com/NetSys/bess/blob/4a4240b61f636a74225d2b17c22d73524e278b18/core/modules/wildcard_match.h#L45

For some use cases we'd like to insert more different values.

Is there more behind this exact number? Performance reason?