Joined December 2010
- Tweets 8,630
- Following 143
- Followers 59,592
- Likes 14,856
1,080 Photos and videos
Pinned Tweet
17 Aug 2025
I've found (and locally fixed) an annoying performance bug on @X web!
TLDR: go to a post with a lot of replies, and scroll up and down - notice it's laggy?
There's a component that calculates the scroll parent, and then removes the scroll listener when unmounting. But it seems we don't even have a scroll listener most of the time, so we can avoid the heavy _getScrollParent function by wrapping it in a conditional
This removes seconds of forced reflow and lag for me
Would love to get it fixed! 🙏🏻 @X @engineering @elonmusk @nikitabier
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Many such cases
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Fast is fun
Jun 12
I significantly improved typo resistant matching performance for fff so today I completely migrate my searches to typo resistant grep
now I can search *any query* real time on the 40m lines of code repository with typos, missing words, wrong delimiters/casing and so on
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21.1km at 90% marathon pace today
Ran a 1:28 half marathon as a result
Will be ticking off my 4th consecutive 100km week tomorrow
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Jun 13
EU regulators in awe of the US blocking global access to an AI model
Jun 13
The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.
The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance.
Access to all other Claude models is not affected.
We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible.
Read our full statement: anthropic.com/news/fable-myt…
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Jun 13
The fun is over
Jun 13
The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.
The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance.
Access to all other Claude models is not affected.
We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible.
Read our full statement: anthropic.com/news/fable-myt…
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Jun 12
I know this sounds like bait to get you to like this post but X has changed the like button animation to a rocket 🚀
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Jun 12
fast code is fun code
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Jun 11
the RAM requirements for software development in 2026
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Jun 11
Today I ran with elite ultramarathon runner @simeonGriggs
He's pushing me to new heart rates and weekly distances
His top complaint: "where are the hills?"
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Jun 11
hot
the rust rewrite of our gateway handles 60-110% more throughput at 50% lower latency
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Jun 10
Yes
Look and ye shall receive big performance wins 📉
Jun 10
In my experience, you can find enormous (and often obvious) performance wins in most systems because no one else has bothered to look
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Jun 9
I set AI loose on the TypeScript Go rewrite for 10 minutes and it has found a parsing bug
very cool
(it's seemingly valid from a quick sanity check!)
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Jun 9
Oh lordy
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Jun 9
Can we get Fable 5 on this?
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Jun 9
new p99 podcast incoming
Jun 9
around 10am pst @Sirupsen, @BenjDicken and i will be streaming and recording the podcast
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Jun 9
the rewrite of the TypeScript compiler into Go is going well
🫠
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