Welcome!

IoT User Interface Authors: Elizabeth White, Pat Romanski, John Basso, Ram Sonagara, Liz McMillan

Related Topics: IoT User Interface, Java IoT, Industrial IoT, Microservices Expo, Microsoft Cloud, Agile Computing

IoT User Interface: Article

Analyzing Webpage Performance with AJAX Edition 4

What makes older versions of IE so slow as compared to newer versions of Firefox?

It's been a while since we released the last major version of Compuware dynaTrace AJAX Edition. With AJAX Edition 4 we introduce the capability to test across all versions of Internet Explorer (IE) starting with IE6 and all versions of Firefox starting with 3.6.

Why is this important? Well, check out the test results of several pages we tested on IE6, 7 and 8 and contrast them with tests of the same pages using Firefox 16 and 18. A product page on Zappos.com loads in 1.3 seconds in Firefox 18 as compared to 5.6 seconds in IE6. That is four times slower on IE's rather ancient browser. Despite a concerted effort by the industry to get people to use updated browsers (including this one by Microsoft), we're still seeing a big mix in the browser versions people use to access websites. That means it's important to analyze webpage performance across browser versions to ensure your site functions and performs as it's supposed to.

In this article I want to show you how to do it and what the typical differences in performance are.

Step 1: Download Free Compuware dynaTrace AJAX Edition
Go to the AJAX Edition webpage and click on the download link. Run the Windows installer and launch it from your Start menu. You will be prompted to register a new APM Community account; use your existing account or continue with a five-day registration-free period. After five days the product remains free to use but you need to register an account. Registering a community account gives you full access to the discussion forum on the Compuware APM Community Portal where you can network with AJAX Edition peers and Compuware application performance experts to learn best practices, post questions and find troubleshooting tips.

Step 2: Capture Data Across Multiple Browsers
Now we are ready to start capturing performance data.

Click on "Click here to start tracing" and select either IE or Firefox. As you will be testing a web page you will be prompted for a name and a URL that you assign to that name, e.g., Zappos and zappos.com. Click "Run" and AJAX Edition will launch your browser and navigate right to that URL.

The AJAX Edition toolbar in IE and Firefox (here it's a status bar) indicates that the browser is connected to AJAX Edition and capturing all performance-relevant data while the browser is connected.

Walk through a use case on the page that you are testing, e.g., navigate through the menus, do a search, put items in your shopping cart or try out the social plugins. AJAX Edition will automatically capture all Network Roundtrips, JavaScript Executions, Rendering Activity and AJAX Requests for later performance analysis.

You may need to modify your browser's settings for this step to work properly. Check out our tips page for more information.

Step 3: Analyze High-level KPIs
I recorded several steps on zappos.com with different browsers. I used IE6, 7, 8 and Firefox 16 and 18. As I don't have all these browsers installed on my local machine I used different machines with AJAX Edition installed locally. After recording my sessions I exported the data into a dtas file and imported it all into my local AJAX Edition instance for analysis. This is also a typical use case in test departments where tests are done on different machines with different configurations. A performance expert receives these sessions for analysis and comparison.

All sessions are now available for analysis. Double-clicking a session opens the Performance Report showing high-level KPIs for each URL visited.

If you want to know the details about how these KPIs are calculated you can read up on them on our Best Practices on Web Performance Optimization community page.

When I checked zappos.com I saw a huge difference in page load time. Sure, I had expected this, but now I can quantify exactly what the difference is, and how different the experience of using the site is for people accessing it on different browsers. The majority of the time turned out to be spent in JavaScript, which took significantly longer on older browsers such as IE 6, IE 7 and Firefox 16.

Check out the following table that shows the key metrics across the different browsers for one of the product pages. The Fully Loaded time is the important metric to look for and the Client Time (Java Script Time) is the one metric with the biggest contribution to that Fully Loaded time:

IE 8 and Firefox 18 are about four times faster in Fully Loaded Time as compared to IE 6, which spends a large amount of time in JavaScript execution.

When looking at the Timeline View of the fastest (IE8) and the slowest (IE6) browsers, it is easy to spot where the differences are during page load:

The long-running JavaScript blocks in IE6 cause the majority of the page load difference compared to its "younger brother," IE 8

It shows how much performance impact JavaScript running on an older browser has on page load time. If supporting older browsers is still a priority for your business you'd better test and optimize for it.

Step 4: Deep-dive Analysis
The AJAX Edition doesn't just leave us with a nice timeline view but also allows us to drill into the JavaScript executions that take so long. Double-clicking on these long-running JavaScript blocks opens the JavaScript PurePath Dashlet that allows us to navigate through the exact JavaScript execution. The following screenshot shows the PurePath dashlet with the highlights on the long-running JavaScript methods. Seems like the problem is related to encoding and decoding long strings that are extraordinarily slow on IE6:

The decode and encode methods are the major contributors to the slow JavaScript execution. The AJAX Edition highlights these methods and also shows the actual source code responsible for it.

Besides going deep into JavaScript, AJAX Edition also provides deep insight into XHR (AJAX) Calls and how these calls impact page performance. Another unique aspect is analysis options for Rendering and Layout activities such as CSS Evaluations, Layouting and Drawing.

If you want to learn more about the deep-five diagnostics options I recommend, check out the online video tutorials on the specific views: AJAX Edition Tutorials.

Step 5: Compare Against Your Competition
Optimizing your site to work well on different browsers is great, but what if you are still much slower than your competition? AJAX Edition has built-in integration with Speed of the Web, which allows you to compare your KPIs against other websites in your industry. Once you have registered a community account and activated your copy of AJAX Edition you can select a category on the first tab in the Performance Report. Your KPIs will then be compared against the latest tests done by Speed of the Web.

On Speed of the Web you can select a category and see how your web performance optimization efforts compare to your competition.

Speed of the Web not only provides the KPIs of the top sites in different industries, it also allows you to test your own site using the same testing infrastructure as used to compute these values used in the comparison. Go to the SpeedoftheWeb.org and enter your URL. Not only will you get an online result of a tested URL you've entered, you will also get an AJAX Edition Session for download as Speed of the Web uses AJAX Edition to run these tests.

Step 6: Go Beyond Your Browser
Not all performance problems can be fixed by optimizing your JavaScript code, using sprites or enabling proper caching. You may also want to automate most of this testing instead of manually analyzing all this data for every build. If you are interested in how to automate performance analysis as well as getting insight into server-side performance problems, check out some of our other blogs such as Top Performance Problems from Zappos, Monster and Co as well as Next Generation Web Performance Optimization.

More Stories By Andreas Grabner

Andreas Grabner has been helping companies improve their application performance for 15+ years. He is a regular contributor within Web Performance and DevOps communities and a prolific speaker at user groups and conferences around the world. Reach him at @grabnerandi

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@CloudExpo Stories
Predictive analytics tools monitor, report, and troubleshoot in order to make proactive decisions about the health, performance, and utilization of storage. Most enterprises combine cloud and on-premise storage, resulting in blended environments of physical, virtual, cloud, and other platforms, which justifies more sophisticated storage analytics. In his session at 18th Cloud Expo, Peter McCallum, Vice President of Datacenter Solutions at FalconStor, discussed using predictive analytics to mon...
Basho Technologies has announced the latest release of Basho Riak TS, version 1.3. Riak TS is an enterprise-grade NoSQL database optimized for Internet of Things (IoT). The open source version enables developers to download the software for free and use it in production as well as make contributions to the code and develop applications around Riak TS. Enhancements to Riak TS make it quick, easy and cost-effective to spin up an instance to test new ideas and build IoT applications. In addition to...
Organizations planning enterprise data center consolidation and modernization projects are faced with a challenging, costly reality. Requirements to deploy modern, cloud-native applications simultaneously with traditional client/server applications are almost impossible to achieve with hardware-centric enterprise infrastructure. Compute and network infrastructure are fast moving down a software-defined path, but storage has been a laggard. Until now.
IoT is rapidly changing the way enterprises are using data to improve business decision-making. In order to derive business value, organizations must unlock insights from the data gathered and then act on these. In their session at @ThingsExpo, Eric Hoffman, Vice President at EastBanc Technologies, and Peter Shashkin, Head of Development Department at EastBanc Technologies, discussed how one organization leveraged IoT, cloud technology and data analysis to improve customer experiences and effi...
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 19th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo Silicon Valley Call for Papers is now open.
"We've discovered that after shows 80% if leads that people get, 80% of the conversations end up on the show floor, meaning people forget about it, people forget who they talk to, people forget that there are actual business opportunities to be had here so we try to help out and keep the conversations going," explained Jeff Mesnik, Founder and President of ContentMX, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
SYS-CON Events announced today that Isomorphic Software will exhibit at DevOps Summit at 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Isomorphic Software provides the SmartClient HTML5/AJAX platform, the most advanced technology for building rich, cutting-edge enterprise web applications for desktop and mobile. SmartClient combines the productivity and performance of traditional desktop software with the simp...
"When you think about the data center today, there's constant evolution, The evolution of the data center and the needs of the consumer of technology change, and they change constantly," stated Matt Kalmenson, VP of Sales, Service and Cloud Providers at Veeam Software, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Let’s face it, embracing new storage technologies, capabilities and upgrading to new hardware often adds complexity and increases costs. In his session at 18th Cloud Expo, Seth Oxenhorn, Vice President of Business Development & Alliances at FalconStor, discussed how a truly heterogeneous software-defined storage approach can add value to legacy platforms and heterogeneous environments. The result reduces complexity, significantly lowers cost, and provides IT organizations with improved efficienc...
With 15% of enterprises adopting a hybrid IT strategy, you need to set a plan to integrate hybrid cloud throughout your infrastructure. In his session at 18th Cloud Expo, Steven Dreher, Director of Solutions Architecture at Green House Data, discussed how to plan for shifting resource requirements, overcome challenges, and implement hybrid IT alongside your existing data center assets. Highlights included anticipating workload, cost and resource calculations, integrating services on both sides...
In his session at @DevOpsSummit at 19th Cloud Expo, Yoseph Reuveni, Director of Software Engineering at Jet.com, will discuss Jet.com's journey into containerizing Microsoft-based technologies like C# and F# into Docker. He will talk about lessons learned and challenges faced, the Mono framework tryout and how they deployed everything into Azure cloud. Yoseph Reuveni is a technology leader with unique experience developing and running high throughput (over 1M tps) distributed systems with extre...
Manufacturers are embracing the Industrial Internet the same way consumers are leveraging Fitbits – to improve overall health and wellness. Both can provide consistent measurement, visibility, and suggest performance improvements customized to help reach goals. Fitbit users can view real-time data and make adjustments to increase their activity. In his session at @ThingsExpo, Mark Bernardo Professional Services Leader, Americas, at GE Digital, discussed how leveraging the Industrial Internet a...
Big Data engines are powering a lot of service businesses right now. Data is collected from users from wearable technologies, web behaviors, purchase behavior as well as several arbitrary data points we’d never think of. The demand for faster and bigger engines to crunch and serve up the data to services is growing exponentially. You see a LOT of correlation between “Cloud” and “Big Data” but on Big Data and “Hybrid,” where hybrid hosting is the sanest approach to the Big Data Infrastructure pro...
In his session at 18th Cloud Expo, Sagi Brody, Chief Technology Officer at Webair Internet Development Inc., and Logan Best, Infrastructure & Network Engineer at Webair, focused on real world deployments of DDoS mitigation strategies in every layer of the network. He gave an overview of methods to prevent these attacks and best practices on how to provide protection in complex cloud platforms. He also outlined what we have found in our experience managing and running thousands of Linux and Unix ...
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Cloud analytics is dramatically altering business intelligence. Some businesses will capitalize on these promising new technologies and gain key insights that’ll help them gain competitive advantage. And others won’t. Whether you’re a business leader, an IT manager, or an analyst, we want to help you and the people you need to influence with a free copy of “Cloud Analytics for Dummies,” the essential guide to this explosive new space for business intelligence.
A critical component of any IoT project is what to do with all the data being generated. This data needs to be captured, processed, structured, and stored in a way to facilitate different kinds of queries. Traditional data warehouse and analytical systems are mature technologies that can be used to handle certain kinds of queries, but they are not always well suited to many problems, particularly when there is a need for real-time insights.
Choosing the right cloud for your workloads is a balancing act that can cost your organization time, money and aggravation - unless you get it right the first time. Economics, speed, performance, accessibility, administrative needs and security all play a vital role in dictating your approach to the cloud. Without knowing the right questions to ask, you could wind up paying for capacity you'll never need or underestimating the resources required to run your applications.
"Software-defined storage is a big problem in this industry because so many people have different definitions as they see fit to use it," stated Peter McCallum, VP of Datacenter Solutions at FalconStor Software, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Enterprise networks are complex. Moreover, they were designed and deployed to meet a specific set of business requirements at a specific point in time. But, the adoption of cloud services, new business applications and intensifying security policies, among other factors, require IT organizations to continuously deploy configuration changes. Therefore, enterprises are looking for better ways to automate the management of their networks while still leveraging existing capabilities, optimizing perf...