Live and Generally Available: Impact Resource Timing

We are very excited to be officially launching Impact Resource Timing (IRT) for general availability.

IRT is Impact’s powerful window into the performance of different sources of content for the pages in your website. For instance, you may want to distinguish the performance of your origin servers relative to cloud sources, or advertising partners; and by doing so, establish with confidence where any delays stem from. From here, you can dive into Resource Timing data sliced by various measurements over time, as well as through a statistical distribution view.

What is Resource Timing? Broadly speaking, resource timing measures latency within an application (i.e. browser). It uses JavaScript as the primary mechanism to instrument various time-based metrics of all the resources requested and downloaded for a single website page by an end user. Individual resources are objects such as JS, CSS, images and other files that the website pages requests. The faster the resources are requested and loaded on the page, the better quality user experience (QoE) for users.  By contrast, resources that cause longer latency can produce a negative QoE for users.  By analyzing resourcing timing measurements, you can isolate the resources that may be causing degradation issues for your organization to fix.  

Resource Timing Process:

Cedexis IRT makes it easy for you to track resources from identified sources, normally identified through domain (*.myDomain.com), by sub-domain(e.g. images.myDomain.com), and by the provider serving your content. In this way, you can quickly group together types of content, and identify the source of any latency. For instance, you might find that origin-located content is being delivered swiftly, while cloud-hosted images are slowing down the load time of your page; in such a situation, you would now be in a position to consider a range of solutions, including adding a secondary cloud provider and a global server load balancer to protect QoE for your users.

Some benefits of tracking Resource Timing.

  • See which hostnames  – and thus which classes of content – are slowing down your site.
  • Determine which resources impact your overall user experience.
  • Correlate resource performance with user experience.

Impact Resource Timing from Cedexis allows you to see how content sources are performing across various measurement types such as Duration, TCP Connection Time, and Round Trip Time. IRT reports also give you the ability to drill down further by Service Providers, Locations, ISPs, User Agent (device, browsers, OS) and other filters.

Check out our User Guide to learn more about our Measurement Type calculations.

There are two primary reports in this release of Impact Resource Timing. The Performance report, which gives you a trending view of resource timing over time and the Statistical Distribution report, which reports Resource Timing data through a statistical distribution view.  Both reports have very dynamic reporting capabilities that allow you to easily pinpoint resource-related issues for further analysis.  


Using the Performance report, you can isolate which grouped resources are causing potential end user experience issues by hostname, page or service provider and when the issue happened. Drill down even further to see if this was a global issue or localized to a specific location or if it was by certain user devices or browsers.  

IRT is now available for all in the Radar portal – take it for a spin and let us know your experiences!