I did not wish to hijack the other thread so am starting this one.

There have been many threads and solutions [or at least, suggestions] posted on numerous Mac discussion boards and lists for quite a while on the matter of Safari slowdown. It must be said of course that for many users there is no obvious slowdown.

These include: fiddling with DNS numbers, emptying Java caches, emptying Safari's caches, blocking the favicons, deleting History, restart and reset Safari, deleting RSS feeds and on and on.

One problem which has been regularly reported is Safari's memory leak which can push your Virtual memory use into the GB range in a few days if you leave your Safari open [even tho not in use] for any length of time.

This is what I have done/do:

1 Set the Icons file permissions to Read only. This is in ~/Library/ Safari/Icons. This prevents a build up of the favicons from web sites you visit.
2       Clear the java caches every week or so
3       Restart Safari every two days or so to release the memory
4       Empty Safari's cache every day
5       Clear the history every day
6       Disable RSS

I still occasionally see a SBBOD but I think my Safari now is as fast as I can get it.

TiPB 867 OS X 10.4.6 Safari 2.0.3 1 GB RAM
.........

Peter Sealy
Thurgoona AUSTRALIA