Marc Pampols

Google introduces Page Speed, a new and a great utility to measure and optimize your website load time.

It's an addon integrated with the well known Firebug for FireFox, and it's a tool that Google used internally to improve the speed of their web pages, now it's public, open-source, and everyone can download it from here

In my opinion, the best thing is the

Google Page Speed - Overall performance summary

Page Speed Activity

From: Google Code Blog - Introducing Page Speed

If you are a Zope/Plone developer and you're learning the ZPT template language, this may help you a lot.

Using Zope Page Templates:
http://www.plope.com/Books/2_7Edition/ZPT.stx

Advanced Page Templates:
http://www.plope.com/Books/2_7Edition/AdvZPT.stx

Zope Page Templates Reference:
http://www.plope.com/Books/2_7Edition/AppendixC.stx