Performance optimization Intro
The three routes from speed to revenue
"A second of delay costs this much conversion" is a number from somebody else's site. Once you know the three routes from speed to money, you can measure…
Technote
Speed and conversion
What a slow site loses, measured rather than assumed — where to measure, what to fix, and how to confirm the fix changed anything.
5 articles
Performance optimization Intro
The Lighthouse score is a summary; the work is in the items
The score is several metrics weighted into one number. What you can act on is the list underneath it — and that list, not the number, is what…
Performance optimization Practical
When field and lab data disagree, which do you believe?
Lab data is one reproducible run under controlled conditions; field data is the distribution of what real customers experienced. When they disagree, they are answering different questions.
Performance optimization Practical
This is how a landing page gets heavy
Nobody decides to make a landing page heavy. It accumulates: one addition per campaign, and nothing ever removed when the campaign ends.
Performance optimization Practical
Who pays for the milliseconds a tag adds?
A tracking script does not stop at downloading. While it is parsed and executed the main thread is busy, and a busy page ignores fingers. That cost is…