Denis Zhdanov

Cloud engineer ☁️ 🛠️ Complexity tamer 🤖⏱💣 Graphite co-maintainer 💛📈💫 Database geek 🤓 Pythonista 🐍 Gopher 🦄 Clojurian λ
@[email protected]

[Denis Zhdanov @deniszh]

@turbojedi I understood that reference!

[Mitchell Hashimoto @mitchellh]

I've got an agent in a loop optimizing a renderer with the goal to minimize frame times (and tests to measure). It got times down from 88ms to 2ms and allocations down from ~150K to 500. Sounds good, right? Wrong. This is exactly why agent psychosis is a big fucking problem.

As an experiment, I rewrote the Ghostty core render state in Go, with access to identically laid out data structures as Ghostty and the exact same validation tests. I made a purposely naive renderer (simple, correct, but slow). 88ms per frame with 150,000 allocations (horrendous, lol)!

I then kickstarted a Ralph loop to bring the frame times down. I told it it can't modify input data structures or the public API or tests (they're correct), but it can do anything else it wants. It got to work.

It has worked for about 4 hours. I've spent around $350 on this experiment so far. The results?

88ms => 1.5ms
150K allocs => ~500 allocs

Incredible right? Nope.

My hand-written renderer I ported has frame times (same benchmark) of ~20us (0.020ms) and 0 allocations in the update path.

This is the problem with psychosis and lacking systems understanding. If you don't understand the system, you're going to accept that this is an incredible result. If you understand the system, you'll see better solutions immediately and can do roughly 75x better on throughput.

The people who blindly trust agent output are in the former camp. They're sheeple, overdrinking from a fountain of mediocrity.

Standard disclaimer: I use AI all the time. I like AI. The point I'm making is to not blindly accept results. Think. Analyze. Learn.

[Yacht Club Games @YachtClubGames]

TRUE FINAL RELEASE DATE!! 🐭🙌
Mina the Hollower launches May 29 for only $19.99!
Prepare yourself for one of the greatest top-down adventures ever to be delivered directly to your soul for less than 20 bucks.
Mark your calendars. Tell your friends. Wishlist now - links below!🧵

[Denis Zhdanov @deniszh]

@HL_Alyx_NoVR @aldenkroll ?

[Mushtaq Bilal, PhD @MushtaqBilalPhD]

Sci-Hub is an evil website that pirated 85M+ research papers and made them freely available

And now they've added AI to their database to make Sci-Bot.

It answers your questions using latest, full-text articles.

But DO NOT use it. We should all try to make billion-dollar academic publishers richer.

I'm putting the link below so you know how to avoid it.

[Denis Zhdanov @deniszh]

@kinomozg Плюсую. Теперь хожу вокруг Saros. Говорят он полегче. Подожду геймплея и подумаю.

[Denis Zhdanov @deniszh]

@Masem55 @MelissaBrillian Нет твое. «Нет детей - нет мнения». :)

[Denis Zhdanov @deniszh]

@bushidops @MARY_CHERRY_PIE Сотрудники компаний партер��в могут сдать в принципе, остальным он не доступен.

[Denis Zhdanov @deniszh]

@oleg86735438 @maxjazzz @MARY_CHERRY_PIE Это не так работает, чтобы сдать на этот сертификат компания УЖЕ должна быть партнером антропика.

[Yaroslav Bulatov @yaroslavvb]

Google has an internal "let it break" essay about a hero engineer whose hard work ends up being a net negative (by masking the underlying issues). My manager sent me that essay when I was trying too hard to get the collective TensorFlow unit test suite green.

[Denis Zhdanov @deniszh]

@KKotl7799 @meowean @pepsipagermtv Это все понятно. От меня то что требуется?

[Genki✨ @Genki_JPN]

Chrono Trigger released 31 years ago today on March 11, 1995!

The game brought together the RPG Dream Team of Hironobu Sakaguchi (Final Fantasy), Yuji Horii (Dragon Quest) and Akira Toriyama (Dragon Quest & Dragon Ball)

[Denis Zhdanov @deniszh]

@chucha_42 На русском на ты нормально будет имхо.

[Chucha @chucha_42]

After 2 years of development I finally have my page on steam, I'm so happy 😭😭���

https://t.co/UUC6wOmr8x

I'm doing everything by myself and I don't have any marketing yet

But could I ask for your likes and retweets? 👉👈

First 50 retweets get a key to closed playtest, and

[Denis Zhdanov @deniszh]

@hexeract @dyedingreen Мешает. Это должна быть реальная вилка с зарплат в вашей компании

[Wise @trikcode]

British Python devs be like "that's a constructor, __init__ ?"

[Sebastian Aaltonen @SebAaltonen]

My "No Graphics API" blog post is live! Please repost :)

https://t.co/uL8HsfIlNV

[Denis Zhdanov @deniszh]

@NVIDIAGeForce GeForce Season

[William Gibson @GreatDismal]

Viktor Tsoi is the major musical influence on my work that the most readers will never have heard of, let alone heard.

[Denis Zhdanov @deniszh]

@iximiuz https://t.co/WyQYVBhNt3