Remember three-second response times? In the days when everyone wore a suit to work, application performance was measured in seconds. Any response time less than three seconds was a victory. At ﬁve seconds, the telephone calls began. More than that and there was bound to be a meeting. As an experiment, Google application performance. You will get more thanRead More
Measure the Real End-User Experience
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Do you experience application hang problems? If so, read this article to discover the top 3 reasons applications hang and cause slow performance. If you have been in the IT industry long enough, you probably know this story well. The application works fine, then, suddenly, the application hangs with no apparent reason. You restart theRead More
In order to have a better understanding about performance and real user monitoring, one should have some understanding of statistics. (This is increasingly true as that is the technology that drives analytics.) The most basic statistics are the average, standard deviation, and the variance. Here we explain those in the simplest possible manner (so thoseRead More
One of my favorite domains to review in existing applications, because it tends to be so error-ridden, is … error-handling. Too many programmers regard a language’s exception-handling syntax as a solution rather than just a mechanism, so error-handling tends to be misguided or at least neglected. A little more attention in this area often paysRead More
Is it OK to use WebSockets? Absolutely. Why, then, reader Klaas Hemstra wonders, did I write in “The Dangers of HTML5: WebSockets and Stable Standards” that the WebSocket protocol is an “unstable spec”? The short answer is that this was the best I know in March 2011 when I wrote these words; the preceding hyperlinkRead More
IT industry trends this year are all aiming towards one goal – accessibility. We’ve all heard the phrase ‘cloud’ tossed around a few hundred times this year, and the phrase ‘private cloud’ has just recently stepped on the scene. However, the newer trends surrounding these phrases are anything but dull or regurgitated. 2016 is provingRead More
“Three main choices for advanced communications in HTML5“, which I posted two months ago, excluded one obvious candidate for “advanced communications”: HTML5‘s server-sent events (SSE). To my surprise, no reader asked me why. Despite this, it’s time to explain SSEs, why I didn’t mention them earlier, and why they are particularly interesting for real-user monitorsRead More
“Real User Monitoring” has probably convinced you by now that application performance is both important and inadequate; so what do you do about it? Accurate measurement and identification of a problem is the first step, of course. When you’re ready for the second step, here are three quite different approaches you can apply with provenRead More
Ready for the future? “Warming Ocean Threatens Sea Life” is it. It’s not the climate change content of the article on which I’m focused at the moment; that’s a topic for another day. More singular, and worthy of our attention now, is that this article is the first in Scientific American to be accompanied byRead More
Linux dominates cloud computing. While explanations for this abound–everything from licensing to operating-system design has been cited–the bare fact is uncontroversial. PowerShell, though, especially in its 4.0 release, makes Windows Server competitive in a way I’ve seen no one outside Redmond adequately credit. I should make clear a bit of my own background first: UnixRead More