Marc Radziwills Web Performance Blog RSS Feed

Update (October 2025): This post was originally published in January 2020 about Svelte 3.

Intro to Svelte events Update (October 2025): This post was originally written for Svelte 3 in 2020.

What are web vitals and why do we need them?

Update (October 2025): This post was originally written for Svelte 3 in 2020.

Update (October 2025): This post was originally published in July 2020.

Update (October 2025): This post was originally published in July 2020.

Update (October 2025): This post was originally published in July 2020.

Update (October 2025): This post was originally published in August 2020.

Update (October 2025): This post was originally published in September 2020 about the Deloitte "Milliseconds Make Millions" study.

Update (October 2025): This post was originally published in September 2020.

Update (October 2025): This post was originally published in September 2020.

Update (October 2025): This post was originally published in October 2020.

Update (October 2025): This post was originally published in October 2020.

Aktualisierung (Oktober 2025): Dieser Artikel wurde ursprünglich im Januar 2021 veröffentlicht.

Intro to service workers So you probably landed here because you do not use service workers in your app and you want to know how they can help you. via GIPHY --> No need to worry.

Lazy loading is a loading strategy that makes it possible to load something later.

Last year I published a blog post about why I moved my site from gatsby to Eleventy.

While working on a talk for an event in my local area, I thought about the main topics you want someone to know about web performance.

Intro to JavaScript performance optimization JavaScript performance optimization techniques for the JavaScirpt engine are simple to apply if you stick to some "rules" or better-said bits of advice.

The development of modern technologies continuously creates a multitude of new digitization possibilities.

2020 was crazy in many ways.

What should you measure to improve performance Web performance is a crucial indicator of the conversion rate.

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.

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!

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