Web Performance

How to measure & improve your ecommerce site speed

Making Nintendo's homepage twice as fast

All the things I did to make Nintendo's homepage load in half the time.

Avoid shared asset CDNs

CDNs are great, but shared asset CDNs can be slower than self-hosting that file instead. Visit today to find out why.

Icon fonts are usually a bad idea

There are some major drawbacks to using icon fonts that cause web performance issues.

Anti-flicker snippets delay rendering

Anti-flicker snippets are used by client-side A/B testing libraries like Google Optimize, but they also delay rendering.

Use nomodule for polyfills

Avoid serving legacy JavaScript to modern browsers by adding the nomodule attribute to your polyfills.

Making Cybertruck Faster

Seeing how web performance changes can improve the loading time of the Cybertruck landing page.

Testing Site Speed Changes with Local Overrides

Quickly learn if a site speed change will have a positive impact, without hassling your dev team.

Tracking Custom Metrics

Why and how to track your own custom metrics for your ecommerce site

Self-Hosting Google Fonts

We found self-hosting Google Fonts can improve Largest Contentful Paint by as much as 1.3 seconds

The Critical Path

Understanding the critical path is a huge step to improving your ecommerce site speed.