Jeremy Jay
@pbnjay.com
Recovering Professor. Engineering Director. Formerly @thepbnjay on twitter
Reposted by Jeremy Jay
A greeting card to apologize for acting out due to unresolved trauma
December 15, 2025 at 1:15 PM
A greeting card to apologize for acting out due to unresolved trauma
That one was a doozy. Funny I used to work with a guy back in grad school who did Circle Packing. Brought back memories!
I just completed all 12 days of Advent of Code 2025! #AdventOfCode adventofcode.com
I just completed all 12 days of Advent of Code 2025! #AdventOfCode adventofcode.com
Advent of Code 2025
adventofcode.com
December 12, 2025 at 7:07 AM
That one was a doozy. Funny I used to work with a guy back in grad school who did Circle Packing. Brought back memories!
I just completed all 12 days of Advent of Code 2025! #AdventOfCode adventofcode.com
I just completed all 12 days of Advent of Code 2025! #AdventOfCode adventofcode.com
My favorite part of JIRA is that I get to have 14 scrollbars on one page.
December 11, 2025 at 3:45 PM
My favorite part of JIRA is that I get to have 14 scrollbars on one page.
Finally completed part B of this one. LP has never been my strong suit!
I just completed "Factory" - Day 10 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/10
I just completed "Factory" - Day 10 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/10
Day 10 - Advent of Code 2025
adventofcode.com
December 11, 2025 at 7:35 AM
Finally completed part B of this one. LP has never been my strong suit!
I just completed "Factory" - Day 10 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/10
I just completed "Factory" - Day 10 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/10
Search trees are always fun!
I just completed "Reactor" - Day 11 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/11
I just completed "Reactor" - Day 11 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/11
Day 11 - Advent of Code 2025
adventofcode.com
December 11, 2025 at 6:29 AM
Search trees are always fun!
I just completed "Reactor" - Day 11 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/11
I just completed "Reactor" - Day 11 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/11
Oof that one definitely took a bit more effort. I don't feel like mine was efficient but at least it was effective!
I've completed "Movie Theater" - Day 9 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/9
I've completed "Movie Theater" - Day 9 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/9
Day 9 - Advent of Code 2025
adventofcode.com
December 9, 2025 at 6:38 AM
Oof that one definitely took a bit more effort. I don't feel like mine was efficient but at least it was effective!
I've completed "Movie Theater" - Day 9 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/9
I've completed "Movie Theater" - Day 9 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/9
I almost made that one way too complicated!
I've completed "Trash Compactor" - Day 6 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/6
I've completed "Trash Compactor" - Day 6 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/6
Day 6 - Advent of Code 2025
adventofcode.com
December 6, 2025 at 6:09 AM
I almost made that one way too complicated!
I've completed "Trash Compactor" - Day 6 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/6
I've completed "Trash Compactor" - Day 6 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/6
I've completed "Cafeteria" - Day 5 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/5
Day 5 - Advent of Code 2025
adventofcode.com
December 5, 2025 at 6:38 AM
I've completed "Cafeteria" - Day 5 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/5
Reposted by Jeremy Jay
this llm shit is trash. software in general worked better before its introduction. my operating system gets more incompetent each update because microsoft has embraced vibe coding. people are cognitively offloading their problem solving skills and then losing them
November 27, 2025 at 1:34 PM
this llm shit is trash. software in general worked better before its introduction. my operating system gets more incompetent each update because microsoft has embraced vibe coding. people are cognitively offloading their problem solving skills and then losing them
Reposted by Jeremy Jay
Debugging the code base after the vibe coder leaves the project
July 12, 2025 at 4:16 PM
Debugging the code base after the vibe coder leaves the project
Reposted by Jeremy Jay
Every flashbang could instead be a meal for a poor kid. Every hotel room for a National Guardsman deployed to fire at our neighbors could house a homeless vet. Every "less-than-lethal" bullet pulled from a journalist's eye could be already needed healthcare for anyone else. All of this is a choice.
June 11, 2025 at 4:22 PM
Every flashbang could instead be a meal for a poor kid. Every hotel room for a National Guardsman deployed to fire at our neighbors could house a homeless vet. Every "less-than-lethal" bullet pulled from a journalist's eye could be already needed healthcare for anyone else. All of this is a choice.
Reposted by Jeremy Jay
Met an active duty member of the military yesterday who filed conscientious objector paperwork in response to deployment of military on U.S. soil.
Was told multiple Army have filed, unknown quantities in other branches.
Was told multiple Army have filed, unknown quantities in other branches.
June 11, 2025 at 4:17 AM
Met an active duty member of the military yesterday who filed conscientious objector paperwork in response to deployment of military on U.S. soil.
Was told multiple Army have filed, unknown quantities in other branches.
Was told multiple Army have filed, unknown quantities in other branches.
Trying to move away from Google Workspace and setting up a new/clean personal @tailscale.com network. I can honestly say I didn’t even re-roll very much for this but could not have gotten any closer to “Dr. J” !
June 11, 2025 at 4:24 AM
Trying to move away from Google Workspace and setting up a new/clean personal @tailscale.com network. I can honestly say I didn’t even re-roll very much for this but could not have gotten any closer to “Dr. J” !
Reposted by Jeremy Jay
The extreme sport of ultrarunning is known for seemingly impossible feats. But Stephanie Case's recent performance — six months after giving birth — is making waves far beyond the running community.
Ultramarathon runner breastfeeds her baby 3 times on her way to a surprise win
The extreme sport of ultrarunning is known for seemingly impossible feats. But Stephanie Case's recent performance — six months after giving birth — is making waves far beyond the running community.
n.pr
May 31, 2025 at 11:46 PM
The extreme sport of ultrarunning is known for seemingly impossible feats. But Stephanie Case's recent performance — six months after giving birth — is making waves far beyond the running community.
Reposted by Jeremy Jay
TypeScript team: rewrites compiler in Go.
Go community: what do you mean your new compiler takes more than a minute to compile? Unacceptable. Dishonorable even. We are so sorry for this sub par experience. Not how we do things around here.
Two days later: WIP 5x speedup.
HN: why pick Go anyway?
Go community: what do you mean your new compiler takes more than a minute to compile? Unacceptable. Dishonorable even. We are so sorry for this sub par experience. Not how we do things around here.
Two days later: WIP 5x speedup.
HN: why pick Go anyway?
cmd/compile: slow escape analysis in large package in the typescript compiler · Issue #72815 · golang/go
Go version go version go1.24.1 linux/amd64 Output of go env in your module/workspace: AR='ar' CC='gcc' CGO_CFLAGS='-O2 -g' CGO_CPPFLAGS='' CGO_CXXFLAGS='-O2 -g' CGO_ENABLED='1' CGO_FFLAGS='-O2 -g' ...
github.com
March 13, 2025 at 12:53 AM
TypeScript team: rewrites compiler in Go.
Go community: what do you mean your new compiler takes more than a minute to compile? Unacceptable. Dishonorable even. We are so sorry for this sub par experience. Not how we do things around here.
Two days later: WIP 5x speedup.
HN: why pick Go anyway?
Go community: what do you mean your new compiler takes more than a minute to compile? Unacceptable. Dishonorable even. We are so sorry for this sub par experience. Not how we do things around here.
Two days later: WIP 5x speedup.
HN: why pick Go anyway?
Reposted by Jeremy Jay
The way I explain AGI to non-tech people is it's the belief that if I read enough book to my dog, there is some threshold at which it becomes a blackbelt in Karate.
January 27, 2025 at 9:57 PM
The way I explain AGI to non-tech people is it's the belief that if I read enough book to my dog, there is some threshold at which it becomes a blackbelt in Karate.
Reposted by Jeremy Jay
I am convinced 99% of websites should use magic links + passkeys.
It bypasses all (debatable) portability objections to passkeys, it’s at least as secure as email-based recovery, as fast as a password manager, it’s available to all users… and importantly, no passwords!
It bypasses all (debatable) portability objections to passkeys, it’s at least as secure as email-based recovery, as fast as a password manager, it’s available to all users… and importantly, no passwords!
I wrote about how magic links (emailed one-time login links) frustrate me while explaining that they radically accept some fundamental truths. I argue that websites should layer passkeys on top of magic links to provide a seamless authentication experience for everyone. rmondello.com/2025/01/02/m...
Ricky Mondello » Magic Links Have Rough Edges, but Passkeys Can Smooth Them Over
rmondello.com
January 2, 2025 at 3:26 PM
I am convinced 99% of websites should use magic links + passkeys.
It bypasses all (debatable) portability objections to passkeys, it’s at least as secure as email-based recovery, as fast as a password manager, it’s available to all users… and importantly, no passwords!
It bypasses all (debatable) portability objections to passkeys, it’s at least as secure as email-based recovery, as fast as a password manager, it’s available to all users… and importantly, no passwords!
I feel like all I’m doing right now is eating leftovers and sleeping.
December 27, 2024 at 5:17 PM
I feel like all I’m doing right now is eating leftovers and sleeping.
Alright I’m officially dropping twitter now. How do I use this thing better?
December 20, 2024 at 7:49 PM
Alright I’m officially dropping twitter now. How do I use this thing better?
Reposted by Jeremy Jay
googling “cratchit family punnett square”
December 11, 2024 at 11:27 PM
googling “cratchit family punnett square”
Sure I can do pretty complex data flows, but yeah sometime I struggle with basic math!
The idea of “PhD level intelligence” is very funny to me, personally, because I have worked with scientists for 20 years.
I know someone who has helped find treatments for diseases we didn’t even think were possible and also struggled to understand how the hot tap of a water cooler worked.
I know someone who has helped find treatments for diseases we didn’t even think were possible and also struggled to understand how the hot tap of a water cooler worked.
June 22, 2024 at 7:26 PM
Sure I can do pretty complex data flows, but yeah sometime I struggle with basic math!