I remember something about mysql not treating localhost as local, but 127.0.0.1 would. This led to very different performance. (Long ago, not sure about details

I remember something about mysql not treating localhost as local, but 127.0.0.1 would. This led to very different performance. (Long ago, not sure about details) Also surprised by libraries not using more efficient protocols although they were defined. Compression also doesn’t seem to be a thing.