Web Performance blog of marc radziwill.

I blog about JavaScript, tech stuff and freelancing.

Welcome to my web performance blog ✍🏽👨🏻‍💻. I post weekly updates from the web performance area covering JavaScript, rendering, networking, business aspects, and much more. Additionally, I write about /JS and freelancing.

Why I migrated my website from GatsbyJs to Eleventy

by Marc Radziwill | August 05, 2020 | 7 minutes to read

Categories: Webperformance, Projects

I announced it on twitter last week, and here you go with my new blog post about the migration from GatsbyJs to 11ty/Eleventy. In this post, I explain to you why I migrated to Eleventy, what were my challenges and how you can avoid them. If you like this article, please share it, follow me, check…

Last week I already published the second part of this series about performance metrics and mapping them to business values. In this part, I want to show a fast and straightforward to apply solutions to optimize for the Critical Rendering Path. If you missed part 1 and part 2, I recommend you to go…

Last week I wrote the first post of this series. In this part, I want to show you a simple method to measure essential performance metrics and map them to standard business metrics. The first post covers the details of the Critical Rendering Path and therefore explains the sequence of steps to…

I recently wrote a blog post about " Why you should care about Web Performance ". It contains a topic collection of how you could convince your client to focus on performance. But nothing convinces people more than numbers. Real business numbers like the conversion rate, the bounce rate and custom…

svelte logo

Svelte bind directive - A cheatsheet

by Marc Radziwill | July 09, 2020 | 3 minutes to read

Categories: Webperformance, Svelte

Svelte bindings are useful to connect your UI with your component state. As this is a widespread pattern for frameworks, Svelte provides some directives for you. Tldr; I spend some time to write down everything about bindings. I show you how you can use them in Svelte to connect your logic with your…

Web Performance Trends in 2020 you should keep an eye on

by Marc Radziwill | June 24, 2020 | 6 minutes to read

Categories: Webperformance

The Web Performance area is improving and has some awesome stuff to explore, but at the end of 2020, not all of our sites will be fast. Many tech people talk about 5G and HTTP/3, but there are much more new frameworks, tools and languages to explore. As always in web performance, you can not click…

Why you should care about Web Performance

by Marc Radziwill | June 22, 2020 | 3 minutes to read

Categories: Webperformance

If you find yourself caring about values like Bounce rate, Revenue, Time on site, page views, user satisfaction, online business success, you should care about web performance! Web Performance is not only a topic for nerds . Web Performance is about your business Web Performance is about the user…

My devcademy is online - get your free web performance checklist

by Marc Radziwill | June 18, 2020 | 3 minutes to read

What is devcademy? devcademy is a remote teaching workshop platform. I offer remote workshops for developers and development teams about web performance, web accessibility and JavaScript . What is the web performance checklist? Three things you get: My web performance checklist is a free tool to…


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