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Tim Kadlec

Performance Engineering Fellow at Catchpoint

Tim Kadlec is a renowned expert in the field of web performance, with a particular focus on optimizing website speed and efficiency. He is the author of several influential books, including 'High Performance Images' and 'Implementing Responsive Design.' Tim has been actively involved in the tech industry for years, contributing to various publications and organizations. His professional journey includes roles such as Performance Engineering Fellow at Catchpoint, Web Performance Consultant at his own company, and Head of Developer Relations at Snyk. Prior to these positions, he held key roles in organizations like Akamai Technologies, Peachpit Press, Breaking Development Conference, COLE Publishing, Element Creative, Envano, and Virtualtech.

Highlights

Aug 16 · linkedin

The new "blocking=render" attribute already in Blink, and coming to Webkit soon, sounds like a strange performance feature at first blush. Why forcefully block rendering?

Harry Roberts, in his typical fashion, does an awesome job in his latest post of explaining how this attribute could actually speed up your pages. Like Harry, I'm really excited to see the impact this could have on notoriously-bad-for-performance culprits like client-side A/B testing tools.

https://lnkd.in/gj3kuEfZ

#webperformance #abtesting #browsers

May 10 · linkedin

Interaction to Next Paint (INP) is going to be a harsh wake-up call.

It captures much more of the actual performance overhead on user interactions than First Input Delay does, painting a much more realistic, and FAR less optimistic, picture of how sites perform in the real-world.

I queried HTTP Archive data to look at the top 100k sites and see how many of the them that use a few common JS-heavy approaches pass the "good" threshold for both FID and INP.

React: Good FID: 91.6% Good INP: 17.0%

Next.js: Good FID: 90.8% Good INP: 11.8%

Vue: Good FID: 93.1% Good INP: 24.9%

Nuxt.js: Good FID: 88.3% Good INP: 14.5%

#corewebvitals #performance #react #javascript

Tim Kadlec
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Location

Eagle River, Wisconsin