Web Performance Reviews of Real Sites

At PerfReviews, we analyze the performance of websites. It's an ideal way to teach how to use tools to detect, fix, and prevent performance issues.

We are recognized Google Developer Experts in web technologies and have extensive experience developing websites with a special focus on usability, accessibility, and performance.

Since websites are dynamic projects, the reviews may mention aspects that are no longer reproducible. Therefore, we accompany the videos with a series of reports that allow you to visualize a 'snapshot' of the website at the time of the study.

Web Performance Analysis of the Renfe Website

Web Performance Analysis of the Renfe Website

We analyzed the Renfe website. We found issues with unminified static files, asset duplication, manual resource combination, and repaint problems caused by tracking libraries.

2/26/2019

Web Performance Analysis of Smashing Magazine

Web Performance Analysis of Smashing Magazine

We analyzed the Smashing Magazine website looking for techniques to deliver pages with good performance and found them. Service worker, preload/preconnect to speed up resource loading, critical CSS with lazy loading for the rest of the CSS, non-blocking font loading... It's the best website we've reviewed so far.

1/28/2019

Web Performance Analysis of Zara

Web Performance Analysis of Zara

We analyzed the Zara website and found good performance techniques but also room for improvement. Large images scaled down, optimizable SVGs, blocking Optimizely...

1/7/2019