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 249 articles on this blog. Find them all on the blog page.

21 July, 2018
Getting to Know a Legacy Codebase
11 June, 2018
Image Inconsistencies: How and When Browsers Download Images
21 May, 2018
Identifying, Auditing, and Discussing Third Parties
2 April, 2018
My Digital Music Setup
1 March, 2018
Measuring the Hard-to-Measure
17 January, 2018
Finding Dead CSS
21 November, 2017
The Fallacies of Distributed Computing (Applied to Front-End Performance)
19 November, 2017
Ten Years Old
10 November, 2017
Relative Requirements
30 October, 2017
Airplanes and Ashtrays

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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ITCSS – coming soon…

Next Appearance

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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