Still stuck: my geo ip lookups are *still* too slow!

okay, i'm back here, pulling my hair out. i thought i had a fix for my geo ip lookup speed, but nope, still stuck in the mud. it's driving me insane.

my 'what is my city name' tool is basically unusable for many users 'cause these geo ip lookups are still adding way too much latency. it's like every request has to wait for ages for the IP database query to finish.

i've tried caching, different providers, everything. is there some obscure ip database service or a super-fast local solution i haven't heard of? i'm desperate for anything that works.

please, someone throw me a lifeline. waiting for an expert reply.