Welcome!

Java IoT Authors: Elizabeth White, Yeshim Deniz, Pat Romanski, Liz McMillan, Kevin Jackson

Related Topics: Java IoT, Microservices Expo, Machine Learning , Agile Computing, Release Management , Apache

Java IoT: Article

Top Performance Mistakes: Supersized Content

Top performance mistakes when moving from test to production

Because of the efforts of people like Steve Souders, John Resig, Sergey Chernyshev, Paul Irish, ... a lot has changed when it comes to optimizing web site performance. Browser and Application Performance Vendors built tools to make Web Performance Optimization easier than ever before. Web Frameworks are optimized to generate better web pages.

However, looking at the following chart reminds us that best practices, conferences and tools alone didn't succeed and building optimized web sites is getting even harder. As can be seen, the main problem with modern web sites is the growing number of resources, the size of the content, and the declining user experience that results from the first two items:

Page Size and Number of Objects on an Average Page doubled over a period of 12 months

If your testing efforts are not focusing on these metrics, read this graph as: "Let's test and optimize our page size!"

You don't want to spend endless test cycles optimizing your applications' "business logic" performance when the major impact of page load times come from too much multi-media content, JavaScript files or content from third-party providers. To prevent this from surprising you, all it takes is testing your application from the perspective of your real end user. This enables you to prevent "super-sized" web pages from hitting the public web. In this blog I show some examples of why pages end up being too big and how to identify these problems before moving them to production.

Example #1: Too many resources
Have you ever analyzed the pages of your application using tools such as dynaTrace AJAX Edition, YSlow, Google Page Speed or SpeedOfTheWeb? The following example is taken from a blog I did last year analyzing the page performance of retail web sites. It shows how many resources are loaded for a single page and how loading that many resources from a large number of different domains comes with the additional cost of Connect and DNS time per domain.

Many websites do not follow Web Performance Optimization Best Practices leading to very long page load times

When we compare this to another online retail store, it becomes clear that there is a lot that can be achieved by optimizing resources loaded on the initial page visit.

Testing and optimizing web sites on resources can lead to 5 times faster page load time

It's clear that not every web site can be optimized like this - but there is a lot of room for improvement and there are lots of easy wins we can achieve. Whether it's merging JavaScript files or using CSS Sprites to reduce the number of images, any or all of these are steps that make sure your web pages won't get supersized.

The statistics shown at the beginning of this post clearly highlight that the average web site is growing in size and complexity. To avoid this, it takes a testing team that focuses on Key Performance Indicators (KPIs) such as # of Images, # of CSS Files, # of external domains, # of used JavaScript Frameworks ... The Best Practices are out there; so are the tools. Now it only takes effort to implement them.

The good news is that testing and verifying these KPIs can be automated and integrated in your continuous performance test process. This avoids manually looking over the results of every single tested page of your application. Here's what it takes to implement it:

  1. Testing Tools that use real browsers in order to test downloads of dynamic content, JavaScript Times, ...
  2. Browser Diagnostic tools that analyze tested pages based on these performance metrics
  3. A Smart Performance Repository that automatically alerts on performance regressions

The following screenshot shows what continuous testing on these KPIs looks like and how to identify regressions immediately by monitoring these metrics for every page and for every test:

Analyzing Key Performance Indicators for every tested page identify regressions early on

Example #2: Heavy Third-Party Content
As already highlighted in the first example, it's not only your own content that can blow up your pages. You probably rely on third-party content such as Ads, Social Platform Widges or Map Services. If that's the case you want to make sure that:

  • Your pages only load the third-party content that is really needed, e.g, global includes in web projects may load third-party content on pages where not necessary
  • You include this third-party party content in an optimized way, e.g., why provide an interactive world map when all you want to do is show a static image of your address?

Klaus Enzenhofer wrote a great blog about Third Party Content Management applied - where he highlights the impact of third-party content and also how to test it. The key message is that you need to understand what type of third-party content you really need, how much impact it has on your page load times, and how to optimize it. Klaus did some testing with Standard Google Maps vs. Static Maps and how this one change can optimize your page load time while still relying on third-party content. The following table shows the difference when using these two ways of including the Maps Services on your page:

KPI

Standard Google Maps

Static Google Maps

Difference in %

First Impression Time

493 ms

324 ms

-34%

Onload Time

473 ms

368ms

-22%

Total Load Time

1801 ms

700 ms

-61%

JavaScript Time

563 ms

0 ms

-100%

Number of Domains

6

1

-83%

Number of Resources

43

2

-95%

Total Pagesize

636 Kb

77 Kb

-88%

For measuring the overhead of third-party content simply take the same tools as explained in the previous example. The following shows the timeline view of dynaTrace where the overhead of Facebook and Google+ are easy to spot:

Analyze your page load times to spot slow third-party content

Call-to-Action
Let's make sure that all the great work that has been done to optimize web site performance is not just left to the browser vendors - they won't be able to speed up your web sites by building a new JavaScript engine or by allowing the browser to download more content on more parallel network connections. Keep the following list in mind:

  • Make sure that these Best Practices are enforced early in the development cycle as well as throughout your performance testing
  • Monitor the critical Key Performance Indicators to ensure that your web sites don't end up super-sized
  • Test using real browsers and don't exclusively rely on protocol-based performance testing

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.


@ThingsExpo Stories
In his session at @ThingsExpo, Eric Lachapelle, CEO of the Professional Evaluation and Certification Board (PECB), provided an overview of various initiatives to certify the security of connected devices and future trends in ensuring public trust of IoT. Eric Lachapelle is the Chief Executive Officer of the Professional Evaluation and Certification Board (PECB), an international certification body. His role is to help companies and individuals to achieve professional, accredited and worldwide re...
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
With the introduction of IoT and Smart Living in every aspect of our lives, one question has become relevant: What are the security implications? To answer this, first we have to look and explore the security models of the technologies that IoT is founded upon. In his session at @ThingsExpo, Nevi Kaja, a Research Engineer at Ford Motor Company, discussed some of the security challenges of the IoT infrastructure and related how these aspects impact Smart Living. The material was delivered interac...
IoT solutions exploit operational data generated by Internet-connected smart “things” for the purpose of gaining operational insight and producing “better outcomes” (for example, create new business models, eliminate unscheduled maintenance, etc.). The explosive proliferation of IoT solutions will result in an exponential growth in the volume of IoT data, precipitating significant Information Governance issues: who owns the IoT data, what are the rights/duties of IoT solutions adopters towards t...
When growing capacity and power in the data center, the architectural trade-offs between server scale-up vs. scale-out continue to be debated. Both approaches are valid: scale-out adds multiple, smaller servers running in a distributed computing model, while scale-up adds fewer, more powerful servers that are capable of running larger workloads. It’s worth noting that there are additional, unique advantages that scale-up architectures offer. One big advantage is large memory and compute capacity...
New competitors, disruptive technologies, and growing expectations are pushing every business to both adopt and deliver new digital services. This ‘Digital Transformation’ demands rapid delivery and continuous iteration of new competitive services via multiple channels, which in turn demands new service delivery techniques – including DevOps. In this power panel at @DevOpsSummit 20th Cloud Expo, moderated by DevOps Conference Co-Chair Andi Mann, panelists examined how DevOps helps to meet the de...
No hype cycles or predictions of zillions of things here. IoT is big. You get it. You know your business and have great ideas for a business transformation strategy. What comes next? Time to make it happen. In his session at @ThingsExpo, Jay Mason, Associate Partner at M&S Consulting, presented a step-by-step plan to develop your technology implementation strategy. He discussed the evaluation of communication standards and IoT messaging protocols, data analytics considerations, edge-to-cloud tec...
"When we talk about cloud without compromise what we're talking about is that when people think about 'I need the flexibility of the cloud' - it's the ability to create applications and run them in a cloud environment that's far more flexible,” explained Matthew Finnie, CTO of Interoute, 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 Silicon India 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. Published in Silicon Valley, Silicon India magazine is the premiere platform for CIOs to discuss their innovative enterprise solutions and allows IT vendors to learn about new solutions that can help grow their business.
The Internet giants are fully embracing AI. All the services they offer to their customers are aimed at drawing a map of the world with the data they get. The AIs from these companies are used to build disruptive approaches that cannot be used by established enterprises, which are threatened by these disruptions. However, most leaders underestimate the effect this will have on their businesses. In his session at 21st Cloud Expo, Rene Buest, Director Market Research & Technology Evangelism at Ara...
Amazon started as an online bookseller 20 years ago. Since then, it has evolved into a technology juggernaut that has disrupted multiple markets and industries and touches many aspects of our lives. It is a relentless technology and business model innovator driving disruption throughout numerous ecosystems. Amazon’s AWS revenues alone are approaching $16B a year making it one of the largest IT companies in the world. With dominant offerings in Cloud, IoT, eCommerce, Big Data, AI, Digital Assista...
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...
"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.
SYS-CON Events announced today that TMC has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo and Big Data at Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Global buyers rely on TMC’s content-driven marketplaces to make purchase decisions and navigate markets. Learn how we can help you reach your marketing goals.
SYS-CON Events announced today that TechTarget 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. TechTarget storage websites are the best online information resource for news, tips and expert advice for the storage, backup and disaster recovery markets.
SYS-CON Events announced today that Telecom Reseller 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. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.
Artificial intelligence, machine learning, neural networks. We’re in the midst of a wave of excitement around AI such as hasn’t been seen for a few decades. But those previous periods of inflated expectations led to troughs of disappointment. Will this time be different? Most likely. Applications of AI such as predictive analytics are already decreasing costs and improving reliability of industrial machinery. Furthermore, the funding and research going into AI now comes from a wide range of com...
SYS-CON Events announced today that Ayehu will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on October 31 - November 2, 2017 at the Santa Clara Convention Center in Santa Clara California. Ayehu provides IT Process Automation & Orchestration solutions for IT and Security professionals to identify and resolve critical incidents and enable rapid containment, eradication, and recovery from cyber security breaches. Ayehu provides customers greater control over IT infras...
SYS-CON Events announced today that MobiDev, a client-oriented software development company, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. MobiDev is a software company that develops and delivers turn-key mobile apps, websites, web services, and complex software systems for startups and enterprises. Since 2009 it has grown from a small group of passionate engineers and business...
SYS-CON Events announced today that Conference Guru 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. A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organi...