How can we dump the HTTP header for a specified URL? It’s not difficult since linux has such tools to do that, below is an example:

This is a forwarded copy from Steves Souders‘ blog site. These rules are the key to speeding up your web pages. The key insight behind these best practices is the realization that only 10-20% of the total end-user response time is spent getting the HTML document to the browser. We need to focus [...]

A lot of blogging and follow-up discussion ensued with the announcement that IE8 supports six connections per host. The blogs I saw: IE8: The Performance Implications IE8 speeds things up IE8: 6 Connections Per Host IE 8 and Performance Testing IE8.s Connection Parallelism IE 8 Connection Parallelism [...]

Why I need to make sure to implement P3P if using iframes or using cross-site cookies? The point is that if your application is inside iframe with parent belongs to another domain – cookies will not work for some very common configurations, for example IE 6/7 with privacy set to medium. If cookies [...]

The Exceptional Performance team from Yahoo.com identified a number of best practices for making web pages fast. The list includes 34 best practices divided into 7 categories.

The mod_setenvif module allows you to set environment variables according to whether different aspects of the request match regular expressions you specify. These environment variables can be used by other parts of the server to make decisions about actions to be taken. The SetEnvIf directive defines [...]