Kenta Iwasaki (@lithdew) header
Kenta Iwasaki (@lithdew) profile picture

Kenta Iwasaki

@lithdew

Building an AI doctor @superpower. @thielfellowship @mozillabuilders

github.com/lithdew
Joined April 2020
  • Tweets424
  • Following51
  • Followers1.1K
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Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)Photo by Kenta Iwasaki (@lithdew)
Kenta Iwasaki retweeted
Susan Zhang (@suchenzang) profile picture
Susan Zhang
@suchenzangAug 17
the dumbest smart people you know are debating temperature and rngs and skewing probability distributions over semantically similar "words" because they heard about word2vec once and believe "word choice" has no functional purpose beyond a canonical dictionary definition and a cosine similarity in latent space "isn't hiding a signature in text the same as hiding it in rgb in a pixelated image?", cries the clever-by-half hot-taker
Susan Zhang (@suchenzang) profile pictureSusan Zhang
@suchenzangAug 15
"watermarking with no quality loss" cries the near illiterate tech employee who hasn't read a single literary work for fun as a grown adult aside from the occasional blog post
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Kenta Iwasaki retweeted
levent (@__alpoge__) profile picture
levent
@__alpoge__Jul 20
hello there the jacobian conjecture is false thanx to my close friend akhil for asking about it and my other close friend fable for working during the world cup final ((1+xy)^3 z + y^2 (1+xy) (4+3xy), y + 3 x (1+xy)^2 z + 3 x y^2 (4+3xy), 2 x - 3 x^2 y - x^3 z): \C^3\to \C^3, has jacobian determinant -2, and sends (0, 0, -1/4), (1, -3/2, 13/2), and (-1, 3/2, 13/2) to (-1/4, 0, 0)
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Kenta Iwasaki retweeted
Superpower (@superpower) profile picture
Superpower
@superpowerJun 30
Legends don't guess. They measure. Giannis Antetokounmpo is our first brand ambassador. 6.30.26
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Kenta Iwasaki retweeted
Loris Cro ⚡ (@croloris) profile picture
Loris Cro ⚡
@crolorisMay 27
Andrew's interview with JetBrains youtube.com/watch?v=iqddnwKF…
Zig 2026: No-AI Policy, $670K Foundation, Left GitHub & Why Zig Isn’t...

Zig 2026: No-AI Policy, $670K Foundation, Left GitHub & Why Zig Isn’t...

Andrew Kelley quit his job in 2018 to build a programming language....

youtube.com
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Kenta Iwasaki retweeted
Mario Zechner (@badlogicgames) profile picture
Mario Zechner
@badlogicgamesMar 25
I'm usually not one to write thought pieces without much technical depth. But here we go. Slow the fuck down. mariozechner.at/posts/2026-0…
Thoughts on slowing the fuck down

Thoughts on slowing the fuck down

Thoughts on slowing the fuck down

mariozechner.at
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Kenta Iwasaki retweeted
Oleg Bartunov (@obartunov) profile picture
Oleg Bartunov@obartunovJan 27
Postgres as data platform: make heterogeneity a first-class engine property—SLA-aware planning, pluggable execution, and machine-readable feedback (visibility, degradations, sources). Otherwise it's just storage+glue. noodata.substack.com/p/postg… #PostgreSQL
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Kenta Iwasaki retweeted
EasyA 🤳📱 (@easya_app) profile picture
EasyA 🤳📱
@easya_app21 Feb 2025
🥈 ($8,000) Thiel Fellow @lithdew and gigabrain engineer @codycode_0209 launched HealthDB. Their AI agent on @Aptos helps users better manage & enrich their health data via a weighted Monte Carlo tree search 🌳
Image from EasyA 🤳📱 (@easya_app)
Image from EasyA 🤳📱 (@easya_app)
Image from EasyA 🤳📱 (@easya_app)
Image from EasyA 🤳📱 (@easya_app)
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Kenta Iwasaki retweeted
Jens Axboe (@axboe) profile picture
Jens Axboe@axboe18 Apr 2023
libuv finally gets io_uring support: github.com/libuv/libuv/commi…
linux: introduce io_uring support (#3952) · libuv/libuv@d2c31f4

linux: introduce io_uring support (#3952) · libuv/libuv@d2c31f4

Add io_uring support for several asynchronous file operations: - read, write - fsync, fdatasync - stat, fstat, lstat io_uring is used when the kernel is new enough, otherwise libuv simply ...

github.com
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ChatGPT exploits a buffer overflow 😳
Image from Brendan Dolan-Gavitt (@moyix)
Image from Brendan Dolan-Gavitt (@moyix)
Image from Brendan Dolan-Gavitt (@moyix)
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Kenta Iwasaki retweeted
Nikita Lisitsa (@lisyarus) profile picture
Nikita Lisitsa@lisyarus7 Oct 2022
Soooo I think the compressor works! Had to fine-tune the options (-2dB threshold, 20:1 ratio, 2ms attack, 1s release), but now I can play a whole bunch of sine waves without my ears bleeding.
Image from Nikita Lisitsa (@lisyarus)
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3 line bugfix 🤦‍♂️ thanks to @lithdew for pointing out syscall overhead the other day github.com/oven-sh/bun/commi…
2x faster `Bun.serve` with async function handlers · oven-sh/bun@9222a5d

2x faster `Bun.serve` with async function handlers · oven-sh/bun@9222a5d

github.com
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The craziest thing about formal methods is that after you've used a model checker enough, you suddenly have an intuition for weird concurrency bugs. Concurrency is hard because we don't normally get immediate feedback on our mistakes. FM gives you that, so your brain picks it up.
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Kenta Iwasaki retweeted
Jens Axboe (@axboe) profile picture
Jens Axboe@axboe4 Mar 2022
Ever noticed syscalls are more expensive on threaded applications? Most syscalls need to pin/unpin the file descriptor for a syscall, and if the file table is shared, that's a nasty double atomic. Some io_uring help for that, with numbers: lore.kernel.org/io-uring/d90…
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Kenta Iwasaki retweeted
tomaka (@tomaka17) profile picture
tomaka@tomaka1712 Dec 2021
IMO a library should be just a collection of functions that do a certain operation. It should **not** provide some abstract interface that other libraries can plug into. Creating mediums of communication between libraries should be reserved for the programming language itself.
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Kenta Iwasaki retweeted
Dan Luu (@danluu) profile picture
Dan Luu@danluu8 Nov 2021
Culturally transmitted skills and values danluu.com/culture/
Three major tools that companies have to influence behavior are incentives, process, and culture. ... If you read "old school" thought leaders, many of them advocate for a culture-only approach, e.g., Ken Thompson saying, to reduce bug rate, that tools (which, for the purposes of this post, we'll call process) aren't the answer, having people care to and therefore decide to avoid writing bugs is the answer or Bob Martin saying "The solution to the software apocalypse is not more tools. The solution is better programming discipline." The emotional reaction those kinds of over-the-top statements evoke combined with the ease of rebutting them has led to a backlash against cultural solutions, in the same way that the 10x programmer meme and the associated comments have caused a backlash that's led to people to say things like velocity doesn't matter at all or there's absolutely no difference in velocity between programmers (as Jamie Brandon has noted, a lot of velocity comes down to ca...

ALT Three major tools that companies have to influence behavior are incentives, process, and culture. ... If you read "old school" thought leaders, many of them advocate for a culture-only approach, e.g., Ken Thompson saying, to reduce bug rate, that tools (which, for the purposes of this post, we'll call process) aren't the answer, having people care to and therefore decide to avoid writing bugs is the answer or Bob Martin saying "The solution to the software apocalypse is not more tools. The solution is better programming discipline." The emotional reaction those kinds of over-the-top statements evoke combined with the ease of rebutting them has led to a backlash against cultural solutions, in the same way that the 10x programmer meme and the associated comments have caused a backlash that's led to people to say things like velocity doesn't matter at all or there's absolutely no difference in velocity between programmers (as Jamie Brandon has noted, a lot of velocity comes down to ca...

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Kenta Iwasaki retweeted
Martin Scott (@fizzychicken) profile picture
Martin Scott
@fizzychicken9 Oct 2021
In programming I don't think there is such a thing as a zero cost abstraction. You either pay it at runtime, compile time or developer time.
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Kenta Iwasaki retweeted
Loris Cro ⚡ (@croloris) profile picture
Loris Cro ⚡
@croloris20 Sep 2021
Fuzzing Zig Code Using AFL++ ryanliptak.com/blog/fuzzing-…
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Kenta Iwasaki retweeted
Protty (@kingprotty) profile picture
Protty@kingprotty18 Jul 2021
Tips i've learned from writing thread pools (this is easier than writing a blog): - Reduce the amount of state owned & updated by one thread to the minimum - Make all queues lock-free and have a centralized blocking scheme instead of locks on some queues (1/n) I'll elaborate
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Kenta Iwasaki retweeted
Daniel Lemire (@lemire) profile picture
Daniel Lemire
@lemire14 Jun 2021
How long should you work on a problem ? lemire.me/blog/2021/06/14/ho… cc @lreyzin
How long should you work on a problem ?

How long should you work on a problem ?

Lev Reyzin says that working too long on a problem might be unproductive: I, personally, have diminishing (or negative?) returns to my creative work as I explicitly work on a problem past some amount...

lemire.me
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The Ribbon filter is a new data structure that is more space-efficient than the popular Bloom filters widely used for optimizing data retrieval. ow.ly/qwkE50FslR0
Ribbon filter: Practically smaller than Bloom and Xor

Ribbon filter: Practically smaller than Bloom and Xor

What the research is: The Ribbon filter is a new data structure that is more space-efficient than the popular Bloom filters that are widely used for optimizing data retrieval. One of the ways that …

engineering.fb.com
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