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.

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

The performance.now() 2024 videos have been published on our YouTube channel.

Our 2025 line-up…