Monthly Archives: March 2026

Early Hints vs. Resource Hints vs. Speculation Rules: Which is right for what, and when?

It’s no secret: the faster things arrive in the browser, the faster the browser can show them to your users. But there are lots of ways to get things into the browser faster. This article compares three similar, but quite different, techniques, explaining how they are similar, how they are different, when each should be used, and how together they create a powerful performance trio. Continue reading

What’s the Most Important Performance Metric?

TTFB? FCP? LCP? INP? CLS? Something else? What’s your most important perf metric? Continue reading

Investigating… can CLS cause a high LCP?

Speedcurve’s Page Speed Benchmarks reported Costco.com’s LCP averaging at 6.85s. But could it be that CLS is at least part of the problem? Read to find out! Continue reading