Hi Paul and Welcome to Apple Discussions 🙂
Do you have a similar fix for slow Safari 4.0.3 on an iBook G4 running OS X.4.11?
Go to the System Preferences>Network panel
-Location - set up a personal location by clicking on the location drop down menu and selecting "add a location". Use a name familiar to you. Once established, select "apply".
-Next, click on the "Show" drop down menu and select Network Port Configurations. Depending on whether you use Ethernet or Airport (wireless) for your setup: Only Ethernet or Airport ought to be checked. Move it to the top of the list (you can drag it). Select "apply". Everything else ought to be unchecked unless you use a Bluetooth device.
-Back to the "Show" menu, select either "Ethernet" or "Airport" (whichever applies to you). Click on the TCP panel. There, enter (copy/paste on separate lines) 208.67.222.222 and 208.67.220.220 in the DNS servers box - these are
Opensource DNS codes.
When done, select OK, then "apply"
Last step: In the Finder, go to your Utilities folder and select "Terminal". Once the screen is open copy/paste
lookupd -flushcache and press return. This clears out the DNS cache. Once done, quit Terminal.
Restart Safari
In Safari Menu>Reset Safari. Select "empty the cache", then reset.
Try a URL