Not sure if I'm doing something wrong, or if by default it uses many more filters than in the tests, but Privaxy uses around 100mb by default on Windows ( (I realise RAM usage will increase with number of filters used) and internet browsing feels slow. Is there a way to run it silently without the console window? I found out how to run Privaxy on Windows without a console window, using an old method.

Internet Speed Test:

Same speed with and without Privaxy, but there is a noticeable delay of a second or two when loading pages while Privaxy is running, while the same pages load instantly without Privaxy.

Maybe HDD throttling? Not sure what the limiting factor is.