Slowfiles

Demonstrate and observe slow-loading resources.

Image Inconsistencies

How and when browsers download images.

‘Can I Use’ based on Google Analytics

No more best-guessing browser support for your site.

Performance Budgets, Pragmatically

A way to define performance budgets for any website.

Real-World Effectiveness of Brotli

Is it worth to move over from Gzip?

The Fastest Google Fonts

Let’s find a snippet for loading Google Fonts at lightning speed.

Site-Speed Topography

A holistic way to visualize performance across an entire site.

“If you’re too expensive, you’ll find that out soon enough. If you’re too cheap, you’ll probably never find it out, and that’s the problem.”

Optimizing Largest Contentful Paint

Insights into the web performance metric, tricks, pitfalls, bugs.

Measure what you impact, not what you influence

Advice for anyone making performance-facing changes.

Critical CSS? Not so fast!

The popular performance technique may be more questionable than you think.

Speeding up async snippets

Do’s and don’ts when working with async snippets of third parties.

Why not document.write()?

How script injection using document.write() hurts web performance.