Debugging Piwik Slowness

I am currently running piwik on a very lightly loaded site (1-2 visitors).

Does piwik only do tracking via JS, I am finding that there is a request like below (removed the important parts), which takes extremely long to load (around 500ms, which is the longest thing on the site)
http://tracking.sandyd.me/piwik.php?action_name=

Hi,

there are several possibilities to track visits with piwik, including JS-tracker, image-tracker, PHP-tracker, server-log-tracking…
The request you are mentioning is the actual tracking-request. You don’t have to worry of long request times because this request is done asynchronously, this means it is loaded after the website itself and doesn’t contribute to to load-time.