|By Andreas Grabner||
|August 30, 2010 03:50 PM EDT||
What factors make you think a web page is good or not? What keeps on that page longer than others? On the one hand it is the content on the page and whether this content is of interest to you. On the other it is the velocity with which you can navigate through the individual pages. High-Speed internet and performance-optimized pages make our day-to-day browsing easier when accessing our emails, tweets, latest updates on sports or news. With all the changes in the recent years in Web Performance Optimization (WPO) we’ve been spoiled by those sites that follow all these Best Practices and boosted their web site experience. No wonder that we start losing our patience with a site that doesn’t respond as fast as we’ve come to expect.
For this particular reason Google modified their ranking algorithm to now also include web performance as one of their metrics. The speed of a web page – the time from entering the URL in the browser until the page has been fully loaded – has now become one factor that defines whether your site shows up on the top or on the bottom of a search result. A good reason to pick “fast by default” as the main theme for this year’s Velocity 2010 Conference. Steve Souders – the driving force behind Web Performance Optimization – hosted this conference and it became clear the significant impact Web Site Performance has on end user behavior and thus the success of a web site.
At last year’s Velocity the first results on Business Impact of Performance were presented to the public. Microsoft, Yahoo and Google presented their results of their internal tests that showed that slower pages have a direct impact on banner clicks – and therefore generated revenue. On the contrary – Shopzilla presented the results of a web site overhaul showing how a faster web site positively impacts the number of users, time spent on site, number of clicks and generated revenue.
Who is faster? Who is better? Bild.de or Spiegel.de?
Similar to my analysis of the FIFA World Cup Website, the Golf Masters or the web site for the Winter Olympic Games in Vancouver I wanted to take a closer look at the two biggest German news portals: Bild.de and Spiegel.de.
Based on Alexa, these are the top two news portals in Germany. Both portals probably have a very different reader community as both publishers have a different way to “present” news. My analysis focuses on how well these pages follow the Best Practices on Web Performance Optimization – therefore the actual content doesn’t matter, as it is all about how to deliver the content. Both pages deliver high-volume, multimedia content. Both pages make money with online ads and therefore it is in their interest that many users visit their site, stay as long as possible on their site and click as many ads as possible. We’ve learned from Google, Bing, etc… that speed is a critical factor in keeping user on the page – now let’s see how these two sites do:
There are three great and free tools available that we can use for an analysis like this:
- dynaTrace AJAX Edition for Internet Explorer 7, 6 & 8
- YSlow for FireFox
- PageSpeed for FireFox and Chrome
All three tools analyze individual web sites based on the Best Practices from dynaTrace, Yahoo and Google and provide a nice overview on whether the rules discussed in these documents were met or not.
The Test scenario
On both sites – www.bild.de and www.spiegel.de – I looked at two individual pages: the start page and the overview page for politics. Important for my testing is to start with a cleared browser cache in order to analyze the page as a First Time Visitor. It is recommended to run the same test again – this time with a primed browser cache – and then compare the timings.
Using any of the three mentioned tools is rather simple. dynaTrace AJAX allows me to record a complete browser session which includes all 4 pages I am testing. The following screenshot shows the Performance Report that is opened when double clicking on the recorded session showing the four tested pages:
We can make the following interesting observations:
- Both sites have a First Impression Time of less than 2 seconds. This means that it takes less than 2 seconds until the user gets a first visual impression of the website – which is considered acceptable
- The Fully Loaded Time of both start pages is very high – both take about 14 seconds to fully load. The main reason for this is the amount of multimedia content (mainly images)
- Bild.de requires 289 HTTP Requests to fully load – that’s 113 more than Spiegel.de
- The full page size of bild.de is 4.6MB. That is 2.5 times more than Spiegel.de which “only” has 1.8MB
Lifetime of a Web Page
The following two screenshots show the dynaTrace Timeline for the start page of Bild.de and Spiegel.de:
There are some fundamental differences between the two start pages:
- Bild.de uses multiple domains to deliver multimedia content, e.g.: bilder.bild.de or newscase.bild.de. Splitting content on multiple domains is a Best Practice that is called Domain Sharding. It has the advantage of letting the browser use more physical network connections to download more content in parallel
- Spiegel.de delivers most of its multimedia content from the primary www.spiegel.de domain which is the bottleneck of their deployment. A browser has a limited number of physical network connections to a single domain, e.g: IE 7 uses 2 connections. If there are more than 2 resources to be downloaded from a domain they need to get queued up and have to wait for a connection to become available. Domain Sharding solves this problem by splitting content on multiple domains
- both pages have individual resources that take extraordinarily long to load, e.g.: initial HTML page and CSS files on spiegel.de or 2 Flash components on bild.de
- Bild.de shows a constantly high rendering activity – caused by animated images as well as the large number of images on that page
Key Performance Indicators
Additionally to the performance metrics as shown in the dynaTrace AJAX Performance Report Overview the Key Performance Indicator (KPI) tab shows a set of additional important KPI’s:
As mentioned earlier, bild.de requires many HTTP Roundtrips (289) in order to load the full page. The number one rule in Web Performance Optimization says to minimize HTTP Roundtrips. 289 roundtrips from browser to server is definitely too much. Every roundtrip needs to wait on a free physical network connection (read more on The Two HTTP Connection Limit Issue). Every roundtrip includes the overhead of network latency between browser and server as well as the overhead of the HTTP Protocol itself (HTTP Headers very often contribute a large percentage of the total roundtrip size).
The KPI Report also shows how many resources (images, CSS, …) are being cached or have to be retrieved from the server every time. The first table shows that 80 resources do not use any browser cache headers. That means that these resources have to be re-downloaded on every subsequent visit of the same user.
Usage of the Browser Cache
The Browser Caching Tab on the dynaTrace AJAX Performance Report performs a detailed analysis of HTTP Cache Headers on every downloaded resource. It is recommended to read Best Practices on Browser Caching which explains available browser caching options.
Bild.de and Spiegel.de don’t make optimal use of the browser cache. The following illustration shows a list of all resources that have no cache setting, a cache setting with a past date or a very short cache expiration date:
Obviously it doesn’t make sense to cache every image on a page. Images that have a short life time should not fill up the local browser cache unnecessarily. If we have a closer look at some of the images on these pages here it seems that at least some of them could be cached for a longer time as they won’t change that frequently. The following section of the website shows images that are cached only shortly (< 48 hours):
These logos will probably not change every 2 days – therefore it makes sense to specify a Far-Future Expiration Header. This reduces the number of roundtrips for revisiting users.
Reducing HTTP Roundtrips
I talked about this several times now – the top rule is to reduce network roundtrips. Besides making use of the browser’s cache there are other ways to reduce the roundtrips for every user (not just revisiting). dynaTrace AJAX has the Network tab that shows those roundtrips that are considered “unnecessary”:
HTTP Redirects allow implementing some important use cases, e.g.: authentication, short memorable URLs or end-user monitoring. Too often though HTTP Redirects are caused by wrong configuration settings on the web server. Redirects that can be avoided are a great way to improve web site performance. On the start page of spiegel.de we have 5 redirects – bild.de has 7. A redirect means an additional HTTP Roundtrip as the browser needs to follow the redirect and request another URL in order to get to the originally requested resource.
Reducing resources not only brings the advantage of fewer roundtrips. It also means that fewer resources need to be downloaded from the same domain which reduces waiting time (remember the limitation of 2 connections per domain on IE7 mentioned earlier in this blog?).
Even though the majority of the content on a news site is static for at least a while (new news doesn’t arrive every second) there is enough content that needs to be generated dynamically for every user. Examples for this are any type of ticker information, weather or personalized ads.
dynaTrace identifies dynamic content based on the rules defined in Best Practice on Server-Side Performance. All these requests are listed on the Server-Side tab in the Performance Report. The Server-Time is the time also known as Time-To-First-Byte. It is the time from the last byte of the HTTP Request sent until the first byte of the response is received. This also includes network latency between the browser and the server – it is however the closest you can get to the server-time without actually measuring the time on the server. The following illustration shows the dynamic resources of bild.de:
The slowest requests are stock information requests, the initial page request itself as well as the weather information. We also see some requests to an external ad-service and requests to a web-tracking service (not visible in the screenshot above). Server-side performance mainly becomes an issue for dynamically generated content – and usually only in a scenario where many users want to access data from the server. In this case it becomes an even bigger problem because it prevents a larger number of users to actually click on those ads that generate revenue.
Top 10 Performance Problems taken from Zappos, Monster, Thomson and Co lists the typical server-side performance problems and shows how to prevent them.
Conclusion: Who delivers the fastest News?
In our tests, neither site does particularly well. Both sites deliver lots of content without following the Best Practices on Browser Caching or Network Roundtrips. The fully-loaded time of both pages is very high with 14 seconds each (obviously this also depends on your connection speed). Both sites deliver an acceptable first visual impression (<2 seconds).
dynaTrace, PageSpeed and YSlow allow uploading performance results to ShowSlow. ShowSlow is an Open Source Platform and can be used as performance repository for web metrics. ShowSlow.com hosts a public instance of the ShowSlow server and allows you to upload and compare results:
The difference in ranking and grading is that every tool puts the focus on different rules. dynaTrace puts its focus on load time first and then on rules such as browser caching or network roundtrips. YSlow and PageSpeed focus more on the Best Practice rules. A good mix of tool usage is therefore recommended – especially because no tool supports every browser anyway.
Now – who is the winner of this analysis? Let’s hope it is us – the readers of these online news portals. With the result of this analysis, with the help of the tools and with the help of people like Steve Souders, Web Site Performance is put in the spotlight and will ultimately lead to better and faster websites:
Performance == More Users == More Revenue
- How better Caching helps Frankfurt’s Airport Website to handle additional load caused by the Volcano Along with so many others I am stranded in Europe...
- Hands-On Guide: Verifying FIFA World Cup Web Site against Performance Best Practices Whether you call it Football, Futbol, Fussball, Futebol, Calcio or...
- Video on Common Performance Antipatterns online [caption id="attachment_1020" align="alignleft" width="250" caption="Parleys - Common Performance Antipatterns"][/caption] Last...
- Thomson Reuters on How they deliver High Performance Online Services We have had some great Webinars with our customers in...
- www.utah.travel in minutes">How to analyze and speed up content rich web sites likes www.utah.travel in minutes One of my daily activities is checking interesting blog posts...
With so much going on in this space you could be forgiven for thinking you were always working with yesterday’s technologies. So much change, so quickly. What do you do if you have to build a solution from the ground up that is expected to live in the field for at least 5-10 years? This is the challenge we faced when we looked to refresh our existing 10-year-old custom hardware stack to measure the fullness of trash cans and compactors.
Aug. 31, 2016 02:45 AM EDT Reads: 1,886
The emerging Internet of Everything creates tremendous new opportunities for customer engagement and business model innovation. However, enterprises must overcome a number of critical challenges to bring these new solutions to market. In his session at @ThingsExpo, Michael Martin, CTO/CIO at nfrastructure, outlined these key challenges and recommended approaches for overcoming them to achieve speed and agility in the design, development and implementation of Internet of Everything solutions wi...
Aug. 31, 2016 02:15 AM EDT Reads: 2,275
Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more business becomes digital the more stakeholders are interested in this data including how it relates to business. Some of these people have never used a monitoring tool before. They have a question on their mind like “How is my application doing” but no id...
Aug. 31, 2016 02:00 AM EDT Reads: 1,986
Cloud computing is being adopted in one form or another by 94% of enterprises today. Tens of billions of new devices are being connected to The Internet of Things. And Big Data is driving this bus. An exponential increase is expected in the amount of information being processed, managed, analyzed, and acted upon by enterprise IT. This amazing is not part of some distant future - it is happening today. One report shows a 650% increase in enterprise data by 2020. Other estimates are even higher....
Aug. 31, 2016 01:45 AM EDT Reads: 3,079
Identity is in everything and customers are looking to their providers to ensure the security of their identities, transactions and data. With the increased reliance on cloud-based services, service providers must build security and trust into their offerings, adding value to customers and improving the user experience. Making identity, security and privacy easy for customers provides a unique advantage over the competition.
Aug. 30, 2016 08:15 PM EDT Reads: 2,492
Qosmos has announced new milestones in the detection of encrypted traffic and in protocol signature coverage. Qosmos latest software can accurately classify traffic encrypted with SSL/TLS (e.g., Google, Facebook, WhatsApp), P2P traffic (e.g., BitTorrent, MuTorrent, Vuze), and Skype, while preserving the privacy of communication content. These new classification techniques mean that traffic optimization, policy enforcement, and user experience are largely unaffected by encryption. In respect wit...
Aug. 30, 2016 08:00 PM EDT Reads: 1,930
SYS-CON Events announced today that 910Telecom will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Housed in the classic Denver Gas & Electric Building, 910 15th St., 910Telecom is a carrier-neutral telecom hotel located in the heart of Denver. Adjacent to CenturyLink, AT&T, and Denver Main, 910Telecom offers connectivity to all major carriers, Internet service providers, Internet backbones and ...
Aug. 30, 2016 08:00 PM EDT Reads: 2,036
SYS-CON Events announced today that Pulzze Systems will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Pulzze Systems, Inc. provides infrastructure products for the Internet of Things to enable any connected device and system to carry out matched operations without programming. For more information, visit http://www.pulzzesystems.com.
Aug. 30, 2016 07:15 PM EDT Reads: 381
There is growing need for data-driven applications and the need for digital platforms to build these apps. In his session at 19th Cloud Expo, Muddu Sudhakar, VP and GM of Security & IoT at Splunk, will cover different PaaS solutions and Big Data platforms that are available to build applications. In addition, AI and machine learning are creating new requirements that developers need in the building of next-gen apps. The next-generation digital platforms have some of the past platform needs a...
Aug. 30, 2016 07:00 PM EDT Reads: 938
Data is an unusual currency; it is not restricted by the same transactional limitations as money or people. In fact, the more that you leverage your data across multiple business use cases, the more valuable it becomes to the organization. And the same can be said about the organization’s analytics. In his session at 19th Cloud Expo, Bill Schmarzo, CTO for the Big Data Practice at EMC, will introduce a methodology for capturing, enriching and sharing data (and analytics) across the organizati...
Aug. 30, 2016 06:15 PM EDT Reads: 381
DevOps at Cloud Expo – being held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA – announces that its Call for Papers is open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the world's largest enterprises – and delivering real results. Am...
Aug. 30, 2016 05:45 PM EDT Reads: 3,596
Traditional on-premises data centers have long been the domain of modern data platforms like Apache Hadoop, meaning companies who build their business on public cloud were challenged to run Big Data processing and analytics at scale. But recent advancements in Hadoop performance, security, and most importantly cloud-native integrations, are giving organizations the ability to truly gain value from all their data. In his session at 19th Cloud Expo, David Tishgart, Director of Product Marketing ...
Aug. 30, 2016 05:00 PM EDT Reads: 907
Fact: storage performance problems have only gotten more complicated, as applications not only have become largely virtualized, but also have moved to cloud-based infrastructures. Storage performance in virtualized environments isn’t just about IOPS anymore. Instead, you need to guarantee performance for individual VMs, helping applications maintain performance as the number of VMs continues to go up in real time. In his session at Cloud Expo, Dhiraj Sehgal, Product and Marketing at Tintri, wil...
Aug. 30, 2016 04:15 PM EDT Reads: 977
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 19th 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 devices - comp...
Aug. 30, 2016 03:30 PM EDT Reads: 3,785
StarNet Adds Secure Remote Linux and Unix Desktops to X-Win32 | @CloudExpo @XWin32 #Cloud #Linux #Security
StarNet Communications Corp has announced the addition of three Secure Remote Desktop modules to its flagship X-Win32 PC X server. The new modules enable X-Win32 to safely tunnel the remote desktops from Linux and Unix servers to the user’s PC over encrypted SSH. Traditionally, users of PC X servers deploy the XDMCP protocol to display remote desktop environments such as the Gnome and KDE desktops on Linux servers and the CDE environment on Solaris Unix machines. XDMCP is used primarily on comp...
Aug. 30, 2016 03:00 PM EDT Reads: 875
Announcing @TelecomReseller Named “Media Sponsor” of @CloudExpo Silicon Valley | #IoT #Cloud #BigData
SYS-CON Events announced today Telecom Reseller has been named “Media Sponsor” of SYS-CON's 19th International Cloud Expo, which will take place on November 1–3, 2016, 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.
Aug. 30, 2016 02:30 PM EDT Reads: 1,063
SYS-CON Events announced today that StarNet Communications will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. StarNet Communications’ FastX is the industry first cloud-based remote X Windows emulator. Using standard Web browsers (FireFox, Chrome, Safari, etc.) users from around the world gain highly secure access to applications and data hosted on Linux-based servers in a central data center. ...
Aug. 30, 2016 02:30 PM EDT Reads: 965
SYS-CON Events announced today that Adobe has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. Adobe is changing the world though digital experiences. Adobe helps customers develop and deliver high-impact experiences that differentiate brands, build loyalty, and drive revenue across every screen, including smartphones, computers, tablets and TVs. Adobe content solutions are used daily by millions of co...
Aug. 30, 2016 02:00 PM EDT Reads: 3,825
Why do your mobile transformations need to happen today? Mobile is the strategy that enterprise transformation centers on to drive customer engagement. In his general session at @ThingsExpo, Roger Woods, Director, Mobile Product & Strategy – Adobe Marketing Cloud, covered key IoT and mobile trends that are forcing mobile transformation, key components of a solid mobile strategy and explored how brands are effectively driving mobile change throughout the enterprise.
Aug. 30, 2016 01:45 PM EDT Reads: 716
Pulzze Systems was happy to participate in such a premier event and thankful to be receiving the winning investment and global network support from G-Startup Worldwide. It is an exciting time for Pulzze to showcase the effectiveness of innovative technologies and enable them to make the world smarter and better. The reputable contest is held to identify promising startups around the globe that are assured to change the world through their innovative products and disruptive technologies. There w...
Aug. 30, 2016 01:30 PM EDT Reads: 901