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jcheng

1,340 karma · joined May 19, 2010

work email: joe AT posit DOT co
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jcheng··on Tesla Roadster
I thought they said 1700kg (Hagerty video)
jcheng··on Tesla Roadster
Reading https://www.tesla.com/roadster, it seems like both variants only use cold gas thrusters, and the difference is that the "normal" (lol) one only has them pointed rearwards while the flying one has them pointed in all different directions as well.
jcheng··on MIT class project turns into an FDA-cleared treatment for tremors
Whoa, I thought that was a typo... when did EECS go to four digits?

So 6.0002 is pronounced "six triple oh two"?

jcheng··on Character.ai has initiated voluntary Chapter 11 bankruptcy
*Matt Levine
jcheng··on Intel D270 GPU AI Accelerator–Up to 480 GB LPDDR5X
I wonder how this compares to a hard(-ish) cap on Sonnet-and-better models, and unlimited access to Haiku. That’s one of the policies we’re considering.
jcheng··on OpenAI annualised revenues $20B less than previously signalled
That's not required, merely that the labs _think_ there is a _chance_ (like Coxon's 10%) that they are on the verge of it.
jcheng··on OpenTPU – An open-source AI accelerator, developed by AI
Financial Independence, Retire Early. It's a whole subculture online, based around the idea that if you can grow your investments to ~25X your annual expenses, you can safely stop working and live off those investments.

https://www.mrmoneymustache.com/2012/05/29/how-much-do-i-nee...

In some kind of economic AI apocalypse, though, who knows if the assumptions behind FIRE will hold.

jcheng··on Owed a billion dollars in Nvidia stock
Those shares were fine, it was the other 9,375 that were in question here.
jcheng··on How OpenAI Used Its Own LLMs to Design Its Jalapeño Chip
> Am I missing something?

If you’re sincerely asking…

Mathematically speaking, 18 / 3.6 isn’t “reducing” by 3.6X, it’s “dividing” by 3.6X. Reducing would be 18 - (18 * 3.6), which is obviously wrong. By your formula, “reducing by 50%” would be 18 / 0.5, also obviously wrong.

Yes, people do say things like “reduce by 3.6X” and are understood to mean what you said, but they also say “literally” when they mean “figuratively”. It doesn’t bother me but I can understand why math oriented people would be annoyed, and I personally would never say “reduced by 3.6X”, but instead “reduced by 72.2%”.

jcheng··on Ask HN: Who is using MCP in production?
They probably mean the tool APIs that the MCP server exposes are well designed. Definitely makes a big difference.
jcheng··on Being ambitious and being a dad
My own accomplishments make me go wheeeee but my kids’ accomplishments, even mundane ones, make me go WHEEEEEEEEE!
jcheng··on Meta data center water discharges suspended for contaminating water supply
According to the article this is a closed loop cooling system, once it’s up and running it doesn’t use any water. They run water through it during installation and that’s the discharge that they found bacteria in.
jcheng··on Show HN: Zanagrams
Fun game! On iOS I frequently triggered a double-tap zoom accidentally, and it’s weirdly difficult to zoom back out once that happens (a second double-tap doesn’t work, and pinch to zoom out only works in some areas of the page).
jcheng··on Show HN: Monolisa v3 – a typeface for developers and creatives
https://en.wikipedia.org/wiki/Menu_key is all I can think of, but that was introduced in 1994...
jcheng··on Pandoc Templates
I'm curious if Quarto could coordinate all of that for you automatically. It supports both code execution via Jupyter, and output via Typst (including books).

https://quarto.org/docs/computations/python.html

https://quarto.org/docs/output-formats/typst.html

https://quarto.org/docs/books/book-output.html#typst-output

https://quarto.org/docs/output-formats/typst-custom.html#boo...

jcheng··on Dropbox CEO Drew Houston to step down
Poor Drew, if only he’d taken Steve’s advice! /s
jcheng··on Greg Brockman interview [video]
I think you make a good point but the use of samples in hip hop doesn’t support it; those samples need to be licensed.
jcheng··on Qwen3.7-Max: The Agent Frontier
Here are some examples of the questions in the benchmark. If these are representative, they seem pretty cut and dry. https://artificialanalysis.ai/evaluations/omniscience#exampl...
jcheng··on Disney erased FiveThirtyEight
"Sometimes you have to change things that are perfectly good just to make them your own." --Jack Donaghy, 30 Rock
jcheng··on Mercedes-Benz commits to bringing back physical buttons
Former E36 owner here as well. What are "monkey pissers"?
jcheng··on Online age verification is the hill to die on
"Disingenuous?" Just because someone finds the style irksome, and chooses to share that here, they're deceptively, calculatingly trying to derail the conversation? That's an extremely cynical and uncharitable take.

If I were the author of the post, I'd value the feedback.

jcheng··on 404 Deno CEO not found
Open core can work, but you really have to find very strong product market fit on the proprietary side--ideally with features that discriminate between users who are relatively happy to pay and users who are not. (There's a reason "SSO tax" is so common.)

And you really have to believe in open source and have the discipline to keep investing in it, otherwise the temptation is ever present to throw more and more effort and resources into the proprietary parts.

jcheng··on (Media over QUIC) on a Boat
Quaid Army?
jcheng··on Pyodide: a Python distribution based on WebAssembly
For that purpose I think most people are using bubblewrap or seatbelt/sandbox-exec with CPython.
jcheng··on Google just gave Sundar Pichai a $692M pay package
> A percentage taken from the increase of an amount every year, is more than the same percentage taken at the end

It sounds like you're describing a hypothetical tax on unrealized gains? Do you have a link to the Buffet letter?

jcheng··on Google just gave Sundar Pichai a $692M pay package
You're thinking of realized capital gains, not tax on the exercise/grant. I don't think there is a way to dodge the latter, and you can't take out a loan or pass down options you never exercised or stocks you were never granted.
jcheng··on Google just gave Sundar Pichai a $692M pay package
Details: $2MM/year in salary, the rest in performance based incentives. The $692MM figure is based on hitting all of the maximums (200% of a few different targets) and is the total for three years.
jcheng··on I verified my LinkedIn identity. Here's what I handed over
Can you say more? Why isn't it neutral or slightly positive? I would assume that a KYC provider would want to protect their reputation more than the average company. If I were choosing a KYC provider I would definitely want to choose the one that had not been subject to any privacy scandals, and there are no network effects or monopoly power to protect them.
jcheng··on Cord: Coordinating Trees of AI Agents
That’s what this is. It’s just defining two types of subagent relationship (spawned and forked) and providing the minimal MCP API for controlling them. It’s up to the LLMs when and how to use subagents.
jcheng··on Warren Buffett dumps $1.7B of Amazon stock
The revenue curves do indeed look a bit different:

https://www.macrotrends.net/stocks/stock-comparison?s=revenu...

Even more so if you compare EBITDA:

https://www.macrotrends.net/stocks/stock-comparison?s=ebitda...

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