Ahmad Farzan is the founder of Evaluat, a real-browser performance testing platform built in the UK. He spent years building and load-testing high-traffic Adobe Commerce and Magento storefronts, where an all-green load test routinely failed to explain what customers actually experienced on the busiest day of the year.

That gap is the work. Evaluat runs every virtual user in its own real browser and records Core Web Vitals, Navigation Timing, session video, network logs and console output for each one, so a failure that hits a handful of shoppers shows up as evidence rather than disappearing under a p99 average.

He speaks about performance testing that measures the browser rather than the server, Core Web Vitals under load, and why ecommerce checkouts break in ways protocol-level tests cannot see.

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Ahmad Farzan is the founder of Evaluat, a real-browser performance testing platform. After years of load-testing high-traffic Adobe Commerce and Magento storefronts, he now builds and talks about testing that measures what the browser experiences under load rather than what the server reports.