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Klaus Enzenhofer

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Top Stories by Klaus Enzenhofer

The Impact of JavaScript Errors These days we are moving more and more logic towards the user into the browser to achieve higher performance and better user experience. There are Single Page Application frameworks like AngularJS, React, Ember and others supporting this trend. If it works, everything is fine. But with this trend a JavaScript error can become a website killer. What does this mean? Below you can see the same page twice, but depending on the browser used, you get a product list from which you can make a selection…or NOT! The difference is the result of a simple JavaScript error. Figure 1: JavaScript error causing a product search to return no result Here is another example of an online email interface showing a list of contacts, or in this case NONE, due again to a simple JavaScript error. JavaScript errors today can ruin the user experience of a web ap... (more)

You Only Control One-Third of Your Page Load Performance!

You don't agree with that? Have you ever looked at the details of your page load time and analyzed what really impacts Page Load Time? Let me show you with a real life example and let me explain that in most cases you only control 1/3 of the time required to load a page as the rest is consumed by third-party content that you do not have under control. Be Aware of Third-Party Content When analyzing web page load times we can use tools such as dynaTrace, Firebug or PageSpeed. The following two screenshots show timeline views from dynaTrace AJAX Edition. The timelines show all networ... (more)

How Real User Monitoring Saves Your Mainframe MIPS

Today I want to share a success story from one of our customers in the financial business that combined the currently hyped topic Real User Monitoring with the good old mainframe. They used Real User Monitoring to identify unnecessary calls from their rich client application into the mainframe and reduced useless data retrieved from the mainframe that ultimately saved them lots of money on MIPS. The customer's internal banking application consists of a Java Rich Client used by the bank clerks in the daily business with the customer. This Rich Client makes calls via the IBM CICS ... (more)

Comparing User Experiences: Web, App and Mobile

With the establishment of mobile web and native mobile apps, your website isn't the only customer touch point anymore. Mike Austin, Director of e-Commerce at RoomsToGo said it best: "Our customers expect the same experience throughout all our channels no matter if it is the website, mobile site or the real physical store!" How can you measure the user experience across the various channels your customers use to interact with you? Let's see what we can do to make the user experience quantifiable so we can make informed data-driven decisions. If we look at the different channel type... (more)

The Difference Between Winning and Losing Mobile Shoppers

Mobile performance will make or break retailers this holiday shopping season - so the importance of application performance management (APM) cannot be underestimated. The convergence of Black Friday, Cyber Monday, Hannukah and Christmas shopping combined with a record level of mobile shopping is creating a perfect storm many companies have never weathered before. Over the coming weeks it will be clear which e-commerce players have read our previous blogs and employed a smart APM strategy. That strategy has to include load testing and web performance optimization in the preparation... (more)