Zoompf's Web Performance Blog

Note: Archived Content

This is the archived version of the Zoompf blog. Since our acquisition by Rigor, all our new research and posts on web performance are being published on The Rigor Blog

Announcing the Zoompf Alerts Beta!

 Billy Hoffman on August 20, 2014. Category: announcements


Today we are ecstatic to announce the public beta launch of Zoompf Alerts!

Zoompf Alerts is a new website performance solution that continuously scans your web pages for changes that introduce new performance defects. Unlike traditional performance monitoring solutions, Zoompf Alerts does not focus on measuring page load times. Instead, Zoompf Alerts detects when actual performance defects are introduced on your site – for example that new 1 MB unoptimized hero image, or that large CSS file no longer served with caching.

By focusing on specific front-end performance defects rather than nebulous and inconsistent page load times, Zoompf helps you answer the question “why did I become slow?” If you ever felt you’ve wasted hours staring at waterfall charts to no avail, then the Zoompf Alerts beta is for you!

The Zoompf Alerts beta is completely free and you can opt-out at any time. To learn more, check out our live demo accounts, and then sign up here:

Join Alerts Beta

About Zoompf Alerts

Over the last 6 months, the team at Zoompf has been hard at work building and refining the Zoompf Alerts product, using the direct feedback from over 25 different performance-minded companies. We’ve gone through 3 major releases, streamlining and refining the product to accomplish these two goals: Find only the performance problems you care the most about, and resolve them quickly.

We set out to accomplish this with 3 main features, which we will now retroactively give impressive and marketing-y names: Continuous Coverage, Targeted Defect Detection, and Superior Defect Intelligence.

Continuous Coverage

Performance defects are just like functional defects. The earlier you find them, the cheaper the impact to your company. This is why Zoompf Alerts continuously scans your website throughout the day, alerting you immediately when new defects are detected.


In addition to timely information, this approach also allows you to track how your performance changes over time. How does your site performance compare to last week? What problems have you introduced, and which are still outstanding? Which areas of your website need to most attention? Zoompf Alerts provides the visibility to answer these questions.

Below you can see how the new Performance Dashboard charts how your defects are changing over time.


Better still, you can view detailed performance “snapshots” captured your performance at specific points in time, allowing you to view your website as it was when the defects were first introduced.


You can also receive daily or weekly summary emails. This allows you to easily track your performance over time in a mobile-friendly, easily digestible format.

Targeted Defect Detection

While website performance can be critically important to your business, we understand this can be one of many priorities. To help, Zoompf Alerts provides Targeted Defect Detection, allowing you to customize how much detail you receive. This customization is accomplished with 3 configurable features: Alert Thresholds, Third Party Content (3PC) Filters, and content Ignore Rules.

Alert Thresholds

Alert Thresholds control the minimum defect severity before you get notified. For example, if time is tight you may choose to set a high alert threshold to alert only if images can be losslessly optimized beyond 200 KB. Conversely, if you are squeezing every last ounce of speed out of your site, you may choose a low alert threshold to notify you of virtually all possible image optimizations. The choice is yours!


You can even choose to disable specific performance rules if they are not relevant to your website.


Third Party Content (3PC) Filters

While Third Party Content (externally linked content that you do not directly control) can often have a significant impact on your site performance, you are often limited in your options to “fix” 3PC defects. Zoompf recognizes 3PC problems can add to the “noise” your team has to process, so by default we utilize our extensive database of third party content to filter out 3PC results so you get alerted on only those defects you can actually fix.

If you do decide you want to know about issues with 3PC, you can still view clearly tagged 3PC content in your results as is shown below.


Ignore Rules

Ignore Rules provide you a powerful mechanism to filter out unwanted content from your defect results. Say, for example, you have a certain CSS file with a known defect that you just don’t have time to fix right now. Rather then continuously receiving alerts on that file, you can choose instead to “ignore” that file in future alerts. Ignore Rules allow you to ignore specific URLs, domains, performance rules, and more!


And don’t worry, ignored defects don’t disappear completely. We still track the problems, and a subtle message keeps you informed how many defects are being suppressed. You can always restore ignored defects later.


With alert thresholds, 3PC filters, and ignore rules, Zoompf lets you control what defects should be detected, and how severe the problem must be before we flag the issue. This is another way to automate testing for performance defects, without getting overwhelmed.

Superior Defect Intelligence

Detecting a performance defect is just half the battle. Zoompf Alerts also helps you see where the problem is, and gives detailed information on how to fix it. And in some cases, we can even fix the problem for you!

First, Zoompf Alerts stores the full HTTP response for any performance defect, captured at the point in time the defect was detected. We then highlight the specific code in the HTTP response so you can quickly spot any problems!


Zoompf Alerts also provides step by step instructions on how to fix most problems, often highlighting solutions specific to the technologies you are using!


And for certain performance defects, like unoptimized images or un-minified files, you can actually download the optimized versions as well!


In Closing

By continuous scanning your website for performance defects with Zoompf Alerts, you can:

  • Automatically find specific performance defects as they are introduced.
  • See only the performance defects you care about.
  • Get detailed information on the cause of the defect, and steps to fix it.

We are so excited to make the beta public. Join the (free!) beta and help keep your site fast!

Join Alerts Beta


Have some thoughts, a comment, or some feedback? Talk to us on Twitter @zoompf or use our contact us form.