Jack Franklin

@jackf.io

Googler focusing on web performance and performance tools. Find me online at https://jackf.io

Technology, like time, cannot be stopped in it's relentless march forward. Much as us old timers would like to slow down one or the other just a little bit… In light of that, Chrome 153 will come with an updated list of modern devices for emulation mode—with nice categorisation—thanks to @jackf.io

An updated list of modern devices DevTools can emulate now nicely categorised into Mobile, Foldables, Tablets & Desktops, and Smart Displays.

In my audits, reading the Performance profile is where people get stuck: the flame chart and waterfall look like noise at first I built an interactive guide to make them click, every figure is interactive, plus LCP, CLS, INP and the Insights panel perf.reviews/profile-guide #WebPerf #DevTools

Reading a Performance Profile: Field Guide

An interactive field guide to the Chrome DevTools Performance panel: waterfall, flame chart, LCP, CLS, INP, and the Insights panel.

perf.reviews

Asked AI on a whim to see if it could identify any reasons my unit tests felt a bit slow and sure enough - runner.test.ts: ~9.3s cumulative → ~0.15s. - All reported test durations: ~27.9s → ~8.3s.

Wayne Rooney live on the BBC saying his highlight of the half time show was the ending and then saying "it was crap" is the undoubted highlight of the entire world cup. Also he was right, wow that was bad.

A colleague asked me if a change I sent for review was "you, or AI" and I was very happy because whilst I used AI to help me debug, plan and impl, I worked hard to make sure I understood the change deeply and got it authored exactly how I want (via prompt + manual tweaks). This is the goal, folks.

Apparently Spotify ship about 2000 AI changes a day or something yet they still can't make your downloaded content appear immediately if you're on very poor signal

All these products that let you run a fleet of AI agents and do 100 things at once are baffling to me; do we actually want this?! I know I can't do more than 1-2 things (with one primary focus) before the quality drops and my head can't keep up and think properly about the problem and solution.

Today's episode of Jack being proud of himself for conforming to an ultimately harmful stereotype of "being a man": I jump started a car for the first time! 😂

I have to collect samples of my dog's poo for the vets and I think my life has officially peaked (The dog is fine, they are trying to double check something but no stress or concern!)

This is me! We're focusing on a few areas next month and I'm leading the "Paper cuts" area. So spam me with your bugs, please - and please file them yourselves first so I can triage them internally 😁

Barry Pollard@tunetheweb.com · 2mo ago

The Chrome DevTools team are doing a "papercuts" sprint where they try to address lots of small, irritating bugs and annoyances. Reply with crbug.com links (no bug, no fix—that's the deal!) and will see what we can do. No promises though as some may be features/too big/unclear how to solve.