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josephscott.bsky.social
Lead of the performance team at Automattic. https://josephscott.org/
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TIL, #git edition: `git push --force-with-lease` - git-scm.com/docs/git-push

In TIL #clickhouse edition, the quantile() function only does sampling. quantileExact() generates, you know, actual quantile values. Naming things can be hard, but this one was self inflicted. clickhouse.com/docs/sql-ref...

I still prefer a Makefile, just keep it as simple as possible

"Be excellent to each other" - Abraham Lincoln: February 17, 1989 - San Dimas, California

Future product idea: quantum ethernet cables, that provide negative latency 😉

LCP and INP are in Interop 2025!!!! web.dev/blog/interop...

It is 2025 and the reminder of "check the return value" is still needed. I'm to blame as much as the next person, trying to be better.

text-align: centaur; I needed this to exist: codepen.io/bradfrost/pe...

We don't have an official CrUX Bluesky account, so for the moment I'll announce the monthly releases. And we're starting with a big one! 🆕 The 202501 release is now live on BigQuery! Check out the announcement post for the full info: groups.google.com/a/chromium.o... Highlights below 👇 🧵 1/10

Avoid marking too many requests as high priority - "If all resources are a priority, none is a priority" Selectively use the fetchpriority="high" attribute to prioritize only the most important resources, for example, the LCP image. #WebPerf #Performance #PerfTools #PerfTips

Have a mentioned how frustrating time zones are recently?

Inbox "not quite zero, but close enough"

I am begging you: if you are writing a thread of more than a couple posts, get a blog. I don’t mean this in a mean way. I mean: allow this thought to continue to exist, outside of this platform, in an actually coherent, readable format that sticks around for longer than 20 minutes. You deserve it!

Dear Github - how about an option to always show absolute date/time instead of relative date/time? Please. #github

Hobbies include: fixing 10 year old bugs

Regular expressions are the code equivalent of "with great power comes great responsibility" #regex

To CSS minifier devs - please include an option to leave the content of "content" alone - github.com/parcel-bundl... - ideally making it the default - it will reduce the headaches all the way around #css #webperf #minify

Curious if anyone in the #webperf community is using this. Would be nice if Safari and Firefox supported more of the recent metrics natively, but in the mean time I'm open to alternatives.

Got another notification from Verizon that they are raising their mobile rates again. Looked over my records, since Jan 2020 the price has gone up more than 30% - ug!

📣 I'm so excited to announce a new meetup I started! PerformanceObserver is a virtual meetup for the frontend web performance community! The first event will be announced shortly. You can join the newsletter to make sure you don't miss an event. #webperf performanceobserver.dev

Trying to figure out Vector VRL's device categorization from parse_user_agent() is surprisingly difficult.

www.youtube.com/@JxmyHighrol... hits just right for the Venn Diagram of #NBA fan + Data Nerd + Data Visualizations Nerd

I've had a few people reach out to me recently asking for help with LCP issues where they are looking at optimising the wrong thing. They were asking what frontend improvements they could make when that was not the problem. Yup it's time for another long thread to try to explain... 🧵 1/17

@infrequently.org does a good job of articulating why he has the position he does. I want the web to win. #webperf

How does your URL parser handle Unicode? lemire.me/blog/2025/01...

Are there any Bluesky apps that will keep track of where you left off reading? Ideally I'd like to only see posts that happened since the previous session. And not just for the main feed, but for tags ( search ) as well.

TIL, that Wireshark will pick up on the `SSLKEYLOGFILE` env variable, nice!

Annual Picard youtu.be/oiSn2JuDQSc?...

Thanks to They Might Be Giants I'm fairly confident that everyone in our family will remember that the Sun is about 93 million miles away - and that is why it looks so small! www.youtube.com/watch?v=3JdW...

This is so well deserved. Not only is Pat one of the most brilliant people I've ever had the opportunity to work with, but he's so generous with his time—I wouldn't be able to do what I do without all the times over the years that Pat patiently answered my questions and helped me figure things out.

"rules" that terminal programs follow jvns.ca/blog/2024/11...

Safari does <img src="vid.mp4"> since 2017. No Chrome, no FF yet in 2024 calendar.perfplanet.com/2017/animate...