Welcome!

Silverlight Authors: Automic Blog, Michael Kopp, Jyoti Bansal, Kaazing Blog, Steven Mandel

Related Topics: Silverlight, ColdFusion, Adobe Flex, Machine Learning

Silverlight: Article

Top Low Hanging Fruit to Performance Optimize Your Web Site

Steve Souders at the Ajax Experience in Boston

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. Lost users and fewer clicks lead to less generated revenue with their ads.

Shopzilla showed how they could boost their business and save on the hardware side by improving their web site performance:

Shopzilla Performance Summary

Shopzilla Performance Summary

Top Low Hanging Fruits

In Steve Souders opinion, most of the web performance problems relate to how the web page is designed leading to issues like too many embedded resources, too large JavaScript files, missing compression and client side caching. Following is a list of some low hanging fruits in order to speed up web site performance. I am using the FREE dynaTrace AJAX Edition to visualize the individual use case scenarios:

Too many network roundtrips due to too many embedded resources

Analyze the actual network roundtrips when requesting a page. Not all embedded resources (like images, css, ...) get loaded in parallel by the browser. Each browser has a set of physical network connections that are used to downloaded embedded objects. The following dynaTrace network view shows that - when accessing http://280slides.com/Editor - 172 .png images have to be loaded by the browser. It also shows how loading these objects gets deferred due to the network connection limitation of the browser.

Many embedded images slow down overall page page

Many embedded images slow down overall page page

You can use several different techniques to lower the amount of network roundtrips. If images are static think about client side caching. Or consider CSS Sprites to reduce the number of images by merging them into one bigger image. Another technique is Domain Sharding to overcome the network connection limitations.

No optimal use of Caching and Compression

Analyze the embedded objects for the usage of client side caching and compression. Static images can be cached on the browser to reduce network roundtrips on subsequent page requests. Look at the http response to analyze current cache settings and analyze if they could be cached in case they are not. Same thing holds true for compression. Large files can be compressed lowering the required network bandwidth.

Request details showing current cache and compression settings

Request details showing current cache and compression settings

Check out this blog entry by Puneet Sangal that gives guidance on content caching and compression.

JavaScript files blocking browser downloads

When JavaScript files are downloaded by the browser - the browser blocks all other activity, e.g.: downloading additional embedded images. This holds true for older browsers (IE 6, FF 3). Newer versions of these browsers at least parallel load other resources - but - once a JavaScript file is downloaded it will be executed. During execution all other tasks are stopped. Looking at the network request image above shows us that there was a big gab after one of the JavaScript files was downloaded. This tells us that the browser actually executed the JavaScript filed and postponed downloading of the remaining embedded objects. Looking at the JavaScript that got executed shows us where the time was actually spent:

JavaScript Execution blocking additional downloads

JavaScript Execution blocking additional downloads

Check out this blog entry from webdigi - it explains how to avoid blocking content download by JavaScript

Failing network requests

AJAX Frameworks tend to dynamically load embedded objects for different reasons either using XHR (XmlHttpRequest), iFrames or by creating DOM objects. Incorrect constructed URLs lead to failing network requests. Using all different types of frameworks that use techniques like that make it hard to identify where in the JavaScript library these URLs are constructed. With the dynaTrace AJAX Edition you can solve this by drilling from the failed network request in the network view down to the PurePath view showing the JavaScript methods that executed the call:

JavaScript library dynamically constructs URLs

JavaScript library dynamically constructs URLs

In the above example the JavaScript framework tried different network path patterns to retrieve a specific file. Each attempt caused a very expensive network roundtrip (>500ms) totalling up to several seconds to retrieve a certain file.

Any other low hanging fruits?

Books like those from Steve Souders or blog entries from the web performance community cover many approaches and checklists to speed up your web page. Please share your experience and post your feedback on this blog.

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

@ThingsExpo Stories
"We've been engaging with a lot of customers including Panasonic, we've been involved with Cisco and now we're working with the U.S. government - the Department of Homeland Security," explained Peter Jung, Chief Product Officer at Pulzze Systems, in this SYS-CON.tv interview at @ThingsExpo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"We provide IoT solutions. We provide the most compatible solutions for many applications. Our solutions are industry agnostic and also protocol agnostic," explained Richard Han, Head of Sales and Marketing and Engineering at Systena America, in this SYS-CON.tv interview at @ThingsExpo, held June 6-8, 2017, at the Javits Center in New York City, NY.
SYS-CON Events announced today that Calligo, an innovative cloud service provider offering mid-sized companies the highest levels of data privacy and security, has been named "Bronze Sponsor" of SYS-CON's 21st International Cloud Expo ®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Calligo offers unparalleled application performance guarantees, commercial flexibility and a personalised support service from its globally located cloud plat...
Internet of @ThingsExpo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 21st Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devic...
"The Striim platform is a full end-to-end streaming integration and analytics platform that is middleware that covers a lot of different use cases," explained Steve Wilkes, Founder and CTO at Striim, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"We are focused on SAP running in the clouds, to make this super easy because we believe in the tremendous value of those powerful worlds - SAP and the cloud," explained Frank Stienhans, CTO of Ocean9, Inc., in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
DX World EXPO, LLC., a Lighthouse Point, Florida-based startup trade show producer and the creator of "DXWorldEXPO® - Digital Transformation Conference & Expo" has announced its executive management team. The team is headed by Levent Selamoglu, who has been named CEO. "Now is the time for a truly global DX event, to bring together the leading minds from the technology world in a conversation about Digital Transformation," he said in making the announcement.
SYS-CON Events announced today that DXWorldExpo has been named “Global Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Digital Transformation is the key issue driving the global enterprise IT business. Digital Transformation is most prominent among Global 2000 enterprises and government institutions.
SYS-CON Events announced today that Datera, that offers a radically new data management architecture, has been named "Exhibitor" of SYS-CON's 21st International Cloud Expo ®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Datera is transforming the traditional datacenter model through modern cloud simplicity. The technology industry is at another major inflection point. The rise of mobile, the Internet of Things, data storage and Big...
"MobiDev is a Ukraine-based software development company. We do mobile development, and we're specialists in that. But we do full stack software development for entrepreneurs, for emerging companies, and for enterprise ventures," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
While the focus and objectives of IoT initiatives are many and diverse, they all share a few common attributes, and one of those is the network. Commonly, that network includes the Internet, over which there isn't any real control for performance and availability. Or is there? The current state of the art for Big Data analytics, as applied to network telemetry, offers new opportunities for improving and assuring operational integrity. In his session at @ThingsExpo, Jim Frey, Vice President of S...
SYS-CON Events announced today that DXWorldExpo has been named “Global Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Digital Transformation is the key issue driving the global enterprise IT business. Digital Transformation is most prominent among Global 2000 enterprises and government institutions.
In his opening keynote at 20th Cloud Expo, Michael Maximilien, Research Scientist, Architect, and Engineer at IBM, discussed the full potential of the cloud and social data requires artificial intelligence. By mixing Cloud Foundry and the rich set of Watson services, IBM's Bluemix is the best cloud operating system for enterprises today, providing rapid development and deployment of applications that can take advantage of the rich catalog of Watson services to help drive insights from the vast t...
SYS-CON Events announced today that EnterpriseTech has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. EnterpriseTech is a professional resource for news and intelligence covering the migration of high-end technologies into the enterprise and business-IT industry, with a special focus on high-tech solutions in new product development, workload management, increased effic...
SYS-CON Events announced today that Massive Networks, that helps your business operate seamlessly with fast, reliable, and secure internet and network solutions, has been named "Exhibitor" of SYS-CON's 21st International Cloud Expo ®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. As a premier telecommunications provider, Massive Networks is headquartered out of Louisville, Colorado. With years of experience under their belt, their team of...
SYS-CON Events announced today that Cloud Academy named "Bronze Sponsor" of 21st International Cloud Expo which will take place October 31 - November 2, 2017 at the Santa Clara Convention Center in Santa Clara, CA. Cloud Academy is the industry’s most innovative, vendor-neutral cloud technology training platform. Cloud Academy provides continuous learning solutions for individuals and enterprise teams for Amazon Web Services, Microsoft Azure, Google Cloud Platform, and the most popular cloud com...
SYS-CON Events announced today that Cloudistics, an on-premises cloud computing company, has been named “Bronze Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Cloudistics delivers a complete public cloud experience with composable on-premises infrastructures to medium and large enterprises. Its software-defined technology natively converges network, storage, compute, virtualization, and ...
SYS-CON Events announced today that CHEETAH Training & Innovation will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct. 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. CHEETAH Training & Innovation is a cloud consulting and IT training firm specializing in improving clients cloud strategies and infrastructures for medium to large companies.
SYS-CON Events announced today that Datanami has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Datanami is a communication channel dedicated to providing insight, analysis and up-to-the-minute information about emerging trends and solutions in Big Data. The publication sheds light on all cutting-edge technologies including networking, storage and applications, and thei...
The current age of digital transformation means that IT organizations must adapt their toolset to cover all digital experiences, beyond just the end users’. Today’s businesses can no longer focus solely on the digital interactions they manage with employees or customers; they must now contend with non-traditional factors. Whether it's the power of brand to make or break a company, the need to monitor across all locations 24/7, or the ability to proactively resolve issues, companies must adapt to...