Web Performance issues can kill a marketing campaign, wasting time and resources, hurting your ROI and bottom line. Learn to recognize web performance issues “in the wild”, how they are represented by Core Web Vitals, and how you and your team can use them to resolve user experiences issues before your holiday shoppers arrive! Continue reading
Category Archives: cls
Presenting a Web Performance MasterClass at the WeAreDevelopers World Congress
I will be presenting an all-day Web Performance MasterClass at the WeAreDevelopers World Congress in San Jose, CA from September 23-25, 2026. I have a discount registration codes available if you’re interested in attending. 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
Hanging my web performance optimization shingle
If you or someone you know needs help with website performance optimizing, please feel free to reach out! Continue reading