I remain stunned at the amount of markup needed for a (fast) responsive LCP image with a few breakpoints
🖼️ <picture>: 1065 bytes
🔗 <link rel=preload>: 1177 bytes

#100DaysOfPerf #webperf

It pays to inspect your website's CPU usage in Safari to improve #webperf and reduce energy usage. Here I spotted recurring rendering work due to infinite animations. After removing those using local overrides, I could see energy use drop. #100DaysOfPerf

When you realise that you can't get rid of 'bad' CLS unless users upgrade their browser:

Or, all my Bad CSS values come from Edge/85

#AimForZero #100daysofperf

🚀 #100DaysOfPerf Day 86. This decision was mulled a few months back, but the PWA test in Lighthouse is being deprecated. It was seeing v little use, amongst other reasons. Wild: I believe LH originally started as a PWA testing tool.
🔗 bit.ly/100dop-day86

🎂 #100DaysOfPerf Day 84. This past weekend, a little known flavour of the JPEG had a 15th bday: JPEG XR (aka Extra Range) is a Windows supported lossy/lossless format. Likely not to see much of it now, but it showed up in networks from time to time!
🎂 bit.ly/100dop-day84

📊 #100DaysOfPerf Day 85. Continuing in the tools and dashboards, a big shout to DebugBear.
They have not been hibernating, working, providing very readable and actionable insights in their performance + #CoreWebVitals monitoring dashboards. Below:
📊 bit.ly/100dop-day85