The cause for swapping was Safari 5 taking up just under 1 GB. Eh!??!
I did a test. I opened Safari, Firefox and Opera and loaded each with 3 tabs: Twitter, Facebook and Gmail and let it simmer for 5 hours.
|Browser||Version||Initial RAM use||RAM use after 5h||CPU usage|
|Safari||5.0||185 MB||301 MB||0.1%|
|Firefox||3.6.3||160 MB||157 MB||3.3%|
|Opera||10.53||205 MB||249 MB||7%|
I don't think I can afford to run Safari now that it uses so much memory. Incredibly, Firefox used less memory after 5 hours than right after loading the pages! I think if anyone these days says Firefox is a bloated browser, they are badly mistaken.
Based on the figures above, Firefox is my new default browser.