Site-Speed Optimisation – Web Performance and Site Speed Consultant

Trusted by:

Harry gave the team a strong footing for identifying performance issues on iPlayer. With his knowledge, we were able to roll out quick fixes to our audiences without the need for big rewrites, all within just two days.
Matthew Burrows, BBC iPlayer
Harry helped our team level up their scalable CSS architecture skills, and to say that he had a large impact on our work is an understatement. We can’t recommend him enough.
Addy Osmani, Google
Harry’s workshop was excellent; we left with tons of new ideas and techniques to improve both the CSS architecture and overall performance of Behance and Adobe Portfolio.
Jackie Balzer, Adobe
There’s a short list of people I whole-heartedly recommend for detailed performance work; Harry is right up there at the top.
Tim Kadlec
The CSS architecture I learned from Harry on the NHS project has changed the way I work. Bravo!
Josh Nesbitt

Articles

There are 248 articles on this blog. Find them all on the blog page.

21 December, 2010
Media queries, handier than you think
20 December, 2010
Remote controlled hyperlinks (or multiple links in one hyperlink)
18 December, 2010
Simplified page borders in pure CSS
8 December, 2010
The implementation ∝ appreciation rule
6 December, 2010
CSS: CamelCase Seriously Sucks!
2 December, 2010
Tweet this!
2 December, 2010
Let it snow!
30 November, 2010
Improving CSS tooltips
29 November, 2010
Design and education
17 November, 2010
Mark up a semantic, accessible, progressively enhanced, mobile optimised progress bar (bonus: style the numbers in an ordered list!)

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.

Suffering? Fix It Fast!

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Projects

ITCSS – coming soon…

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Talk
Devoxx Greece: Athens (Greece), April 2025

Learn:

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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