Welcome!

Java IoT Authors: Yeshim Deniz, Elizabeth White, Pat Romanski, Liz McMillan, Chris Schwarz

Related Topics: Java IoT, Microservices Expo, Machine Learning

Java IoT: Article

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

You can’t rely on big third-party providers to always deliver high 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 network downloads, rendering activities and JavaScript executions that happen when loading almost exactly the same page. The question is: Where does the huge difference come from?

Timeline of web page with and without third-party content showing a difference of 8 seconds in total page load time

The two screenshots below show these two pages as rendered by the browser. From your own application perspective it is the exact same page - the only difference is the additional third-party content. The screenshot on the left side refers to the first timeline, the screenshot on the right to the second timeline. To make the differences easier to see I have marked them with red boxes.

Screenshot of the page without and with highlighted third-Party content

The left screenshot shows the page with content delivered by your application. That's all the business-relevant content you want to deliver to your users, e.g., information about travel offers. Over time this page got enriched with third-party content such as Tracking Pixels, Ads, Facebook Connect, Twitter and Google Maps. These third-party components make the difference between the two page loads. Everyone can easily see that this "enrichment" has an impact on page load performance and therefore affects the user experience. The super-fast page that finishes the download of all necessary resources after a little over two seconds is slowed down by eight seconds. Table 1 shows five KPIs (Key Performance Indicators) that represent the impact of the third-party content.


# of Domains

# of Resources

Total Bytes

DNS [ms]

Connect [ms]

With Third Party Content

26

176

2856 Kb

1286,82

1176,09

Without Third Party Content

2

59

897 Kb

0,91

22,25

Table 1: Comparison of KPIs with and without third-party content

Four Typical Problems with Third-Party Content
Let me explain four typical problems that come with adding third-party content and why this impacts page load time.

Problem 1: Number of Resources
With every new third-party "feature" we are adding new resources that have to be downloaded by the browser. In this example the number of resources increased by 117. Let's compare it with the SpeedOfTheWeb baseline for the shopping industry. The best shopping page loads at least 72 resources. If we would stick with our original page we would be the leader in this category with just 59 resources.

In addition to 117 roundtrips to download these resources, it also means that the total download size of the page grows significantly. To download the extra ~2 Mb from the servers of the third-party content provider your customer will need extra time. Depending on the bandwidth and latency the download time can vary and, if you think of downloading the data via a mobile connection, it really can be time-consuming.

Problem 2: Connection Usage
Domain sharding is a good way to enable older browsers to download resources in parallel. Looking at current modern websites, domain sharding is often used too aggressively. But, how can you do too much domain sharding? Table 2 shows us all the domains from which we only download on or two resources. There are 17 domains for downloading 23 resources - domain sharding at its best!

What about connection management overhead? For each domain we have to make a DNS look-up so that we know to which server to connect. The setup of a connection also needs time. Our example needed 1286 ms for DNS lookup and another 1176 ms for establishing the connections to the server. As almost every domain refers to third-party content you have no control over them and you can't reduce them.

URL

Count

www.facebook.com

2

plusone.google.com

2

www.everestjs.net

2

pixel2823.everesttech.net

2

pixel.everesttech.net

2

metrics.tiscover.com

2

connect.facebook.net

1

apis.google.com

1

maps.google.com

1

api-read.facebook.com

1

secure.tiscover.com

1

www.googleadservices.com

1

googleads.g.doubleclick.net

1

ad-dc2.adtech.de

1

csi.gstatic.com

1

ad.yieldmanager.com

1

ssl.hurra.com

1

Table 2: Download Domains from which less than three resources are downloaded

Problem 3: Not Minified Resources
You are trying to reduce the download size of your page as much as possible. You have put a lot of effort into your CI process to automatically minify your JavaScript, CSS and Images and then you are forced to put ads on your pages, for example. On our example page we can find an ad provider that does not minify JavaScript. The screenshot below shows part of the uncompressed JavaScript file.

Uncompressed JavaScript code of third-party content provider

I have put the whole file content into a compressor tool and the size can be reduced by 20%. Again you can't do anything about it.

Problem 4: Awareness of Bad Response Times of Third-Party Content Provider
Within your datacenter you monitor the response times for incoming requests. You will be alerted if the performance of the response time is decreasing. Within your data center you will know when something is going wrong and you can do something about it. What about third-party content? Do Facebook, Google, etc., send you alerts if they are experiencing bad performance? You will now say that these big providers will never have bad response times, but take a look at the following two examples.

Timeline with slow Facebook request

This timeline shows us a very long running resource request. You will never see this 10698 ms lasting request in your datacenter monitoring environment as the resources are provided by Facebook one of the third-party content providers of this page.

Timeline with slow Facebook and Google+ requests

The second example shows the timeline of a different page but with the same problem. On this page not only Facebook is slow but also Google+. The slow requests have durations from 1.6 sec to 3.5 sec. and have a big impact on the experience of your user. The problem with the user experience is that the bad experience is not related to the third-party content provider but to YOU!

Conclusion
What we have seen is that third-party content has a big impact on user experience. You can't rely on big third-party providers to always deliver high performance. You should be aware of the problems that can occur if you put third-party content on your page and you really have to take action. In this article I have highlighted several issues you are facing with third-party content. What should be done to prevent these types of problems will be discussed in my next blog -Third Party Content Management!

More Stories By Klaus Enzenhofer

Klaus Enzenhofer has several years of experience and expertise in the field of Web Performance Optimization and User Experience Management. He works as Technical Strategist in the Center of Excellence Team at dynaTrace Software. In this role he influences the development of the dynaTrace Application Performance Management Solution and the Web Performance Optimization Tool dynaTrace AJAX Edition. He mainly gathered his experience in web and performance by developing and running large-scale web portals at Tiscover GmbH.

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.


@ThingsExpo Stories
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.
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...
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...
"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.
"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 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.
"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...