Running TinyDNS in front of "slower DNS" server?

Hello all,

Anyone ever run TinyDNS in front of your slower DNS server? We use a slightly custom built DNS server for a handful of reasons.. Anyhow the custom DNS server our company uses it a bit slow, or really just doesn't handle high volume very well. Does the idea of putting TinyDNS in front of it cache the results make any sense?

P.s. I know alot of people will say "replace your custom DNS" but that is not my question so thanks for already in advanced (;

Thanks!