Performance, Scalability and Architecture

Andreas Grabner

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Top Stories by Andreas Grabner

DevOps is speeding towards the IT world like a freight train and the hype around it is deafening. There is no reason to be afraid of this change as it is the natural reaction to the agile movement that revolutionized development just a few years ago. By definition, DevOps is the natural alignment of IT performance to business profitability. The relevance of this has yet to be quantified but it has been suggested that the route to the CEO's chair will come from the IT leaders that successfully make the transition to a DevOps model. If this still seems foreign to you, I recommend reading up on DevOps Blog from IT Revolution, the OpsCode Blog, and check out The Phoenix Project. Despite all the talk around simple monitoring tools, breaking through the walls between Dev and Ops still poses a real challenge. This is because of a misunderstanding around Operations real purp... (more)

Open Source Selenium Web Application Testing System

Selenium is a free Web Application Testing System. It gained lots of popularity since it is available. It’s integration to FireFox – which allows instant record/replay as well as the scripting option - makes it a great tool for functional web testing. BrowserMob on the other side leverages Selenium by providing an automated load-testing environment for Selenium scripts all configurable online via a Web Dashboard. Tagging Web Requests In my recent blog post – Get more out of functional web testing: How to correlate test reports with server side log information? – I discussed the ... (more)

Top Ten Client-Side Performance Problems in Web 2.0

Inspired by the Top 10 Performance Problems post which focuses on Server-Side performance problems taken from companies such as Zappos, Thomson, Monster and Novell I came up with the Top 10 Client-Side performance problems in Web 2.0 applications I’ve seen when working with our dynaTrace AJAX Edition users. Symptom: JavaScript blocking resource downloads and slowing page load time JavaScript opened the door for Web 2.0 applications. Since JavaScript is used on almost every web site traditional methods to analyze web site performance don’t always give you all the answers for a slow... (more)

Randomizing Input Data for Visual Studio Load Tests

Microsoft Developer on Ulitzer While preparing for my presentation Load and Performance Testing: How to do Transactional Root-Cause Analysis with Visual Studio Team System for Testers that I gave at the Boston .NET User Group on May 13th I came across certain load-testing topics. One was: How to randomize Input Data. If you go with Visual Studio you can code your web tests in any .NET Language giving you the freedom to create random data by using e.g.: System.Random. If you however want to use the “nicer” UI Driven Web Test Development (that’s how I call it) – you are limited in ... (more)

Top Low Hanging Fruit to Performance Optimize Your Web Site

Web Page Performance was one of the big topics at the Ajax Experience in Boston this week. Steve Souders - author of High Performance Web Sites and Even Faster Web Sites - talked about the top things to look into when analyzing web page performance. Business impact on Web Site Performance Steve presented some recently published studies from Google, Microsoft and Shopzilla showing how much of a business impact web page performance has. Google and Bing presented a study showing how many people leave the site with degrading page performance and many fewer clicks these users make. Lo... (more)