performance.now()

the web performance conference 30-31 October 2025, Amsterdam

On 30th and 31st of October, the sixth edition of performance.now() will take place in Amsterdam - a single track conference covering today’s most important web performance insights.

Buy your ticket or see our line-up

Selected by our program co-chairs Tim Kadlec, Tammy Everts, and Harry Roberts, our speakers treat topics and case studies including JavaScript, CSS, performance culture, PWAs, image optimization, the post-Core-Web-Vital world, performance budgets, frameworks, ecommerce, monitoring, mobile browsers, and perceived performance.

The performance.now() 2024 videos have been published on our YouTube channel. The photos are also available.

Our 2025 line-up…