[Exim] iplsearch vs file list?

On Wed, 16 Jun 2004, Nico Erfurth wrote:
> With a current exim version you can also use the iplsearch lookup, which
> matches an ip against a file with ips and netmasks. If it's just one
> host/network you want to block, then use
>
I have the following in my exim config:
hostlist relay_from_hosts = 127.0.0.1:/usr/exim/etc/relayips

which seems to work just fine (the relayips files is a list of CIDR one
per line) should I be using something like an iplsearch lookup or does it
really matter?

Thanks
-s