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Web server performance shoot out - simple pages

There are some new hot web server frameworks: Ruby on Rails (Ruby), Yaws+ErlyWeb (Erlang) and HAppS (Haskell.)
These new frameworks are supposed to facilitate fast development. But, how fast - and scalable - are the applications built in and for these frameworks?
The goal of this post is to get a preliminary answer to this question. NOTE: […]

Finding and traversing DOM elements in JavaScript

Do you have to furnish a lot of HTML elements from JavaScript, such as for formatting or inserting special effects? Well, then you need to know the performance - or lack thereof - of finding and traversing DOM elements. And the performance hit of using Microsoft's browser.
This post tries to clarify the performance hits involved. [...]