Book Image

ASP.NET Site Performance Secrets

By : Mattijs Perdeck
Book Image

ASP.NET Site Performance Secrets

By: Mattijs Perdeck

Overview of this book

Do you think that only experts with a deep understanding of the inner workings of ASP.NET, SQL Server, and IIS can improve a website's performance? Think again – because this book tosses that notion out of the window. It will help you resolve every web developer's nightmare – a slow website – with angry managers looking over your shoulder, raging calls from advertisers and clients – the lot. You don't have the time or energy to gain a thorough and complete understanding of ASP.NET performance optimization – You just need your site to run faster! This book will show you how.This hands-on book shows how to dramatically improve the performance of your ASP.NET-based website straight away, without forcing you through a lot of theoretical learning. It teaches you practical, step-by-step techniques that you can use right away to make your site faster with just the right amount of theory you need to make sense of it all.Start reading today and you could have a faster website tomorrow.Unlike other performance-related books, here you'll first learn how to pinpoint the bottlenecks that hold back your site's performance, so you can initially focus your time and energy on those areas of your site where you can quickly make the biggest difference. It then shows you how to fix the bottlenecks you found with lots of working code samples and practical advice, and just the right amount of theoretical detail.The first chapter details techniques for diagnosing performance issues using Waterfall charts. Subsequent chapters then each focus on one individual aspect of your website, providing you with numerous real-life scenarios and performance-enhancing techniques for each of them. In the last chapter, you learn how to effectively load-test your environment in order to measure the change in performance of your site without having to update your production environment – whether it is a new release or simply a small change in the database.
Table of Contents (19 chapters)
ASP.NET Site Performance Secrets
Credits
About the Author
About the Reviewers
Preface

Serving images from cookieless subdomains


When you set a cookie on the browser, all subsequent requests from the browser carry that cookie, including requests for static content, such as images and CSS and JavaScript files. This is magnified by the fact that many visitors will have an asymmetric Internet connection, where the upload connection from browser to server is slower than the download connection from server to browser. If the upload connection is a quarter of the speed of the download connection, a 1000-byte cookie takes as long to transfer as a 4000-byte file.

Because the browser sends cookies only to the domain that actually set it, you can get rid of the cookie overhead by serving static content from a separate subdomain. This makes sense if you serve lots of static files and you set big cookies.

To make this work, log in to your domain registrar account and create an A record for a new subdomain, such as img.mydomain.com. Make sure it points to the IP address used by your website...