Safari very slow

Have an eMac 1Ghz MacOs 10.5.8 Safari loads too slowly. Anyone know why?

This Safari is Installed on Macbook mod 1.1 running OS X v 10.4.11.
Processor 1.83 GHz Intel Core Duo
Mem 1GB 667 MHz DDR2 SDRAM
Using Airport Extreme - Firmware 1.4.4
to connect to cable modem via Apple airport device.

I read with interest, Hawaiian Starman's reply to SabineReynolds and entered my System Preferences panel to find out how to change my DNS numbers as recommended, but I can't find any "Advanced" button - to make the changes. Is there an answer to this?

(Part 2) - Should I persevere or can I simply copy another version of safari from another Macbook that I have. Will the software copy OK or will it only load from a bought version?

Thanks for any help - Den

I read all of the comments, complaints and solutions offered on various sites for slow Safari. Mine has been killing me. Pages won't load, or only will load if I stop and start the load over and over. It is incredibly slow on many pages/sites, but super fast on other sites or when I do a speed test (speedtest.net). I tried configuration changes to Safari and my router, using OpenDNS, and all those suggestions off the boards. My Windows PC works fine and does not have the slow internet problems. I have a cable modem and separate Belkin $80 router. Belkin has never offered any SW updates, and I have the most recent updates for all MAC SW. It got worse (slower) with updates of MAC SW, not better. When I plug directly into the cable modem Safari works fine. Through the router it does not, as described above. I believe that the router is not forwarding or proxying messages that Safari now requires (DNS related and other things maybe). I bought a new router, which happened to be the MAC router extreme, and all works totally fine! That's it. Instead of beating your head against a wall trying to figure out what is going on, simply replace your router or, if your router is part of a modem supplied by a service provider, ask them what they can do about it.