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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)

Case Study: Too Fast for the User

I just heard an interesting story from Runtastic, who is one of our Mobile Real User Monitoring customers. Runtastic's main mobile app allows their users to track their sport activities such as running, biking, hiking or skiing. They had a user complaining about too high speed. He didn't actually complain about the performance of the app but instead complained about his average speed during his workout as calculated by the app. After his one hour biking session, the app showed the he covered a distance of 490 km - that would probably be a world record and give him the yellow shir... (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)

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)

What to Do If A/B Testing Fails to Improve Conversions?

A/B and multivariate testing are often used to improve the conversion funnel. What these tools do is randomly place alternative change images, text or other design elements to gather statistics about how these things affect site visitors. Companies have had great success using such solutions, but sometimes multiple rounds of testing still produce inconclusive data: changing the color or image on their pages did not have a significant impact on the overall conversion rate. Does this mean that there is no way for that business to improve the conversion funnel? In these cases, mark... (more)