SQL is not going to be of much help when the dataset easily fits into memory, but I'm a bit surprised by the lack of performance of the trie. I guess the overhe

SQL is not going to be of much help when the dataset easily fits into memory, but I'm a bit surprised by the lack of performance of the trie. I guess the overhead is too much when the dataset has a lot of single IP addresses (only one byte difference), but I imagine it would be helpful for sparse IPv6 addresses. Go has an excellent standard library, but the solutions in there rarely compete with others writing a dedicated library to solve a hard problem they really had to solve.