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Tag: RUM

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2026


  1. Web-Perf Wednesday 008 – Good INP Rates Keep Falling

  2. Web-Perf Wednesday 007 – Chrome Makes Busy Workers Measurable

  3. Web-Perf Wednesday 006 – Faster Browser Releases Change Your RUM Population

  4. Unattributed Navigation Overhead (UNO) Is Underrated

  5. Web-Perf Wednesday 005 – RUM Needs More Than a Percentile

  6. Introducing LUX Sidecar: Your SpeedCurve Companion

  7. Web-Perf Wednesday 003 – Native SPA Metrics Have Arrived

  8. Web-Perf Wednesday 002 – The Metrics Don’t Tell the Whole Story

  9. Web-Perf Wednesday 001 – SPAs Are Finally Becoming Measurable

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Hi there, I’m Harry Roberts. I am an award-winning Consultant Web Performance Engineer, designer, developer, writer, and speaker from the UK. I write, Tweet, speak, and share code about measuring and improving site-speed. You should hire me.

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I help teams achieve class-leading web performance, providing consultancy, guidance, and hands-on expertise.

I specialise in tackling complex, large-scale projects where speed, scalability, and reliability are critical to success.

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