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Tag: DevTools

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Get more from Chrome DevTools: custom timings, the Performance panel, and the profiling tricks that turn a trace into an answer.

2026


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

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

  3. When Safari’s ‘Ignore Cache’ Ignored Cache-Control

2025


  1. Making Sense of the Performance Extensibility API

2019


  1. Bandwidth or Latency: When to Optimise for Which

2017


  1. Performance and Resilience: Stress-Testing Third Parties

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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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