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tomjakubowski

8,550 karma · joined April 21, 2012

Valued customer at Ralphs.

You can find meanness in the least of creatures, but when God made man the devil was at his elbow. A creature that can do anything. Make a machine. And a machine to make the machine. And evil that can run itself a thousand years, no need to tend it.

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tomjakubowski··on Dubious research tied to Red Bull has shaped energy drink policy
Drip coffee has ~40-50% more caffeine per 8oz serving than Red Bull (about 90-100mg vs 65mg). The nice thing about coffee is that the mouth-puckering tannins make it harder to absolutely pound them, like one can do easily with cans of Red Bull.
tomjakubowski··on The lost civic life of movie rental stores
Somewhat to my surprise, given its proximity to skid row and downtown's general trend since Covid, in my experience the LA Central Library usually has few visibly homeless people inside. I work remotely and live nearby and walk there every now and then to work outside the home. Almost everyone I see hanging out in the study table areas seem to be students or remote workers. The few homeless people I have seen at the library keep to themselves and often are reading quietly like any other patron.
tomjakubowski··on The lost civic life of movie rental stores
It grinds my gears a bit when "works 9-5 in an office" is equated with "gainfully employed". There are lots of working people who have free time during these hours: restaurant and retail workers, hospital nurses and doctors, firefighters and EMTs, artists and artisans, YouTubers and professional HN posters, actors and circus performers, authors and architects, homemakers and remote office workers, and so on.
tomjakubowski··on Show HN: How far do I have to go to run into 100k people?
Yeah, this can't possibly be right. Los Angeles, the city, has less than 4 million people, and there are complete "circles" of presumably 7.2 million people entirely within its boundaries.

If you set the petal population threshold to a low value, like 10k or 20k, and drag it to a densely populated area like Koreatown, you'll get a degenerate "circle" with 0 feet in every direction.

tomjakubowski··on C/C++ projects packaged for Zig
The build.zig doesn't build anything from the doc or tests folders. Otherwise, yeah.
tomjakubowski··on How is the Bun rewrite in Rust going?
Yes, and curiously many of the tellings of this story don't account for the costs of the human software engineers (Jarred and the other bun team members) who guided all of this work.
tomjakubowski··on Businesses with ugly AI menu redesigns
As a digital native, I was shocked to learn that Photoshop's dodge and burn tools were based on real physical techniques for photo development!

https://en.wikipedia.org/wiki/Dodging_and_burning

tomjakubowski··on Jack Dorsey launches Buzz to combine team chat, AI agents and Git hosting
It's potentially open to the public as well, given the right legal action. The Enron email dump revealed secrets that presumably ended several marriages.
tomjakubowski··on Caffeine and Cardiovascular Disease: AHA Scientific Statement
Well, there is Eureka[!] magazine: https://mathigon.org/eureka
tomjakubowski··on Dupes took over the world
Only mozzarella di bufala campana has PDO, even in Italy there are non-PDO, generic mozzarella cheeses produced outside the region.
tomjakubowski··on Claude Fable produced a counterexample to the Jacobian Conjecture
Agreed totally. When past computer-assisted proofs were published, nobody (or hardly anyone) waxed about this being evidence of Rocq or Coq as superintelligent or even conscious beings of some kind, as people have said about LLMs.
tomjakubowski··on Kaiser nurses say AI, surveillance are making their jobs and patient care worse
Mangione had back issues and apparently some difficulty in getting treatment for it, but he wasn't insured by UHC. According to his manifesto, he chose Brian Thompson as his victim because UHC was the largest health insurance company in the United States.
tomjakubowski··on AWS: Inaccurate Estimated Billing Data – $1.7 billion
But 2^30 is 28.
tomjakubowski··on Profiling the "Abundance" housing bottleneck with real data
Huh? I thought that Vienna's partition period following WWII lasted more like ten years than sixty.

https://en.wikipedia.org/wiki/Allied-occupied_Austria

tomjakubowski··on Since Chromium 148, Math.tanh is now fingerprintable to link underlying OS
Hopefully it takes much less than a millisecond to render a single emoji. Ca. 2018 I wrote some bad OpenGL code which could render a swarm of millions of poop emoji on a rather large display at 60 fps, so that was less than ~16e-6 ms per emoji.
tomjakubowski··on My thoughts on the Bun Rust rewrite
You're both right: the essay does not really contain ad hominem fallacies, but the essay itself is surely an ad hominem attack, on Jarred as a person. No judgment here, I don't know Jarred or Andrew at all, but like other commenters I did find the closing paragraphs saying the author has no ill-will towards Jarred quite unbelievable.
tomjakubowski··on My thoughts on the Bun Rust rewrite
It may be hard to separate the work and non-work personas of Jarred in particular. I watched an interview with Jarred where the interviewer asked what he liked to do for fun, what were his hobbies outside of work, and so on. His answer was that he liked working on Bun, and that's all he did. I felt a bit sad for him about it: even Linus T. has hobbies (like diving) and has raised a family.

That said, it isn't necessarily the case that workaholics are bad managers, or that they insist on workaholism in their subordinates. We, generally, don't have access to Andrew's rumornet, we can only go off what Jarred's said publicly.

tomjakubowski··on Acronym Fatigue Series Introduction: why I'm wary of acronyms
Every day we stray further from gopher://
tomjakubowski··on Papa Johns Can Predict When Your Fridge Is Empty
> into the air void above the ketchup.

Somebody at Heinz packaging department should be working on a ketchup syringe.

tomjakubowski··on Papa Johns Can Predict When Your Fridge Is Empty
> rather than spend a penny of the $87 million in gross profit they were making.

PJ's gross profits are much higher than this, in the hundreds of millions, usually over $500M. $87 million is approximately their net income for 2024 ($83.49M, down to $30.5M in 2025).

https://www.macrotrends.net/stocks/charts/PZZA/papa-johns/gr...

https://www.macrotrends.net/stocks/charts/PZZA/papa-johns/ne...

tomjakubowski··on Postgres data stored in Parquet on S3: LTAP architecture explained
Don't know about other systems, but in Ducklake every committed transaction creates a new snapshot.

https://ducklake.select/docs/stable/duckdb/usage/snapshots

tomjakubowski··on Postgres transactions are a distributed systems superpower
I don't think it's true that distributed and decentralized mean the same thing. A hub and spoke rail system is centralized, but it's still a distributed system, if it has multiple trains running concurrently.* A distributed system has to coordinate somehow, and a single central DB is one way of doing it.

*: edit, maybe a better example here is a rail system with a single central dispatcher is centralized but may still be distributed

tomjakubowski··on Vibe Coded X11 Server Written in Rust Adds Xinerama, FreeBSD Support
In the past 20 years there have been enormous gains in tooling and culture, besides the rise of LLM-assisted coding, which make this task easier now. The task was already easier five years ago than twenty. Don't get me wrong, LLMs can speed this process up, and help experts and diligent newbies alike produce software faster, but you are discounting the gains in other parts of our work.

Since 2006, knowledge has become more available on the Internet. There is StackOverflow (for) now, and any number of developer blogs, in addition to the voluminous books published on programming. Hardware setups became more homogenous and the kernel took over handling more of graphics. Compilers, static analyzers, debuggers and testing tooling are all leagues better now. More code is published online, which can be used as learning material. Developers as a class of people have grown in numbers and experience. More mistakes in various open source software projects have been made, and recorded publicly for others to learn from.

tomjakubowski··on Exercise intensity influences body composition in healthy older adults (2025)
And if you're Andrew Skurka, in peak form, you'll get 15 hours in per day.

https://www.keithfoskett.com/the-andrew-skurka-interview/

tomjakubowski··on A way to exclude sensitive files issue still open for OpenAI Codex
The desire not to leak valuable secrets is a strong argument for supporting local-first developer workflows. If an AI agent exfiltrates the credentials to connect to my local dev Postgres database which stores synthetic data, that's pretty low impact.
tomjakubowski··on Zig's new bitCast semantics and LLVM back end improvements
Macintoshes have had mnemonic keyboard shortcuts for inserting en- and em-dashes since forever: option-hyphen and option-shift-hyphen. They've been in my digital repertoire since I first switched to a Mac around 2004.
tomjakubowski··on Extreme Heat conference cancelled due to extreme heat warning
Much of the population of Australia are from those same groups.
tomjakubowski··on The deadly rise of giant trucks and SUVs
In downtown LA I routinely spot on-duty police officers, who are usually cruising in large SUVs, texting while driving.
tomjakubowski··on Codex logging bug may write TBs to local SSDs
The most likely way I think you'd catch this in a test would be by accident, running some kind of long-running integration test for other purposes, and then finding the disk gets filled up in CI (or on a developer machine).
tomjakubowski··on There is minimal downside to switching to open models
You can also edit binary distributions of models with means besides changing their weights. See "LLM Neuroanatomy: How I Topped the LLM Leaderboard Without Changing a Single Weight."

On the spectrum of:

  careful engineering--hacking--mad science
This kind of thing falls far towards the mad science end of the scale, but has proven effective.

https://dnhkng.github.io/posts/rys/

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