Sitefinity Performance optimization tips

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Article Number000070905
EnvironmentProduct: Sitefinity
Version: 5.x, 6.x, 7.x, 8.x, 9.x, 10.x, 11.x
OS: All supported OS versions
Database: All supported Microsoft SQL Server versions
Question/Problem Description
General recommendations to improve performance on Sitefinity?
How to improve the time Sitefinity takes to generate pages
Performance improvements to the time to load the main HTML page
Pages take too long to update after leaving the main page
What Sitefinity features are available to improve Websites which handle a large amount of requests
Can Sitefinity preload specific pages to improve server load time
Page updates take too long; in general
Steps to Reproduce
Clarifying Information
Error Message
Defect/Enhancement Number

NOTE: Performance fine-tuning and debugging performance issues fall outside of the scope for support: .

Measure, measure, measure

When dealing with performance issues, it is useful to know as precisely as possible what type of performance degradation we are talking about, e.g.

  • An example of a page that takes a long time to load
  • How long does it take to load?
  • Is the page always slow to load regardless of the time of day?
  • Is the page always slow do load on production and in development?

This allows comparison between other environments and measure any improvement. For instance, if the same page loads normally off hours but is too slow during peak time, this is an indication the site is overloaded. On the other hand, if the same page takes a long time to load both on the production and development environment, a heavy load can be ruled out.

Where does the issue come from? 

Loading the page using the developer console Network tab (press F12 on most browsers) provides the first clues about where the issue could come from. In particular, focus on the time it takes to load the main HTML page:

User-added image

In the above example, the Web browser waits for 250ms for the main page to be ready to load ("Waiting (Time to First Byte)" metric), and 32ms to load it ("Content Download" metric).

  • A long "Time to First Byte" is often an indication that the Web site takes a long time to generate the page.
  • A long time to load is symptomatic of a slow network. Check with your hosting provider.
  • If the main page is quick to load but nonetheless takes a long time to be displayed, this may be because there are too many custom static resources to load (JavaScript, CSS, images). One way to reduce the overhead is to combine multiple resources into one (e.g. combine all custom CSS files into one)

General performance optimization

If Sitefinity takes too long to generate pages, you can check the following articles for performance optimization:


You can check if the Data Caching is enabled: under Administration > Settings > Advanced > DataEnable data caching  should be empty, so it gets the default value (True).

See Sitefinity documentation, cache settings for further information about Sitefinity Caching

Use Load Balancing

Websites which have to handle a large amount of requests should be hosted in a load balanced environment with at least 2 instances. This will guarantee not only very high availability for the website, but also allow to execute procedures on the website without affecting its availability. You can for instance remove one of the instances from the load balancing, perform some maintenance operation and put it back online, while the other node handles all the requests during the maintenance.

This setup will also allow to warm-up the instance before letting it handle requests, and hide the waiting for that initial load.

Deployment of a new version of the website should always detach the instances from the load balancer one by one, perform the upgrade, warm them up and even then put them back on. In this way the website will provide a nice, consistent experience for the end users.

Static resources take some time to load: consider using a CDN

Customers who want optimal performance often rely on third-party Content Delivery Networks (CDN) so that static files such as images, style sheets or JavaScript pages are loaded as fast as possible for their end users. You can see how to configure Sitefinity to use a CDN on Sitefinity documentation, cdn storage for content libraries

Faster system restart

Please refer to the Sitefinity startup performance article.

Speedup the Local development

Use SSD disk or RAM disk when possible. More information

Remove the unnecessary assembly references, keep only the ones needed and used, e.g. in case of using nuget packages

Install Roslyn compilation:

Usage of Diagnostics module

If Diagnostics module is active, deactivate it by navigating to Administration > Modules & Services > Action (of Diagnostics module) > Deactivate
References to Other Documentation:
Progress, Sitefinity Scope of Support
Progress Sitefinity Documentation, Optimize performance
Progress Sitefinity Documentation, Recommended environment settings
Last Modified Date10/4/2018 12:01 PM

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