Articles
There are 247 articles on this blog. Find them all on the archive page.
Your website is slow. I know why. Web performance is big business for any industry: from recouping lost sales to increasing conversions; reducing running costs to user retention; better SEO to lowering your environmental impact. Let’s work together to identify and fix your blind-spots.
What is your web performance strategy? How much does a 1s slowdown cost you? How do you measure its impact? Is your monitoring effective or even appropriate? How much is web performance worth to your bottom line? Together, we can work out answers to all of those questions and more.
What’s better than one of me? A team of me. Let me show your engineers how to find and fix all of the things that I can. Get your team self-sufficient, equipped with all of the right tools and knowledge to be your own in-house web performance experts. Never run slowly again.
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
There are 247 articles on this blog. Find them all on the archive page.
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.
You can now find me on Mastodon.
Devoxx Greece: Athens (Greece), April 2025
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.