marcel - at gtc

Staff Data Scientist, Mathematician, Father of two. Deep Learning / NLP / Computer Vision / MLOps OCaml Curious Not sponsored by Spindrift

[marcel - at gtc @mrclbschff]

rtweet's @kearneymw made me a word cloud 😂

[marcel - at gtc @mrclbschff]

@Target did you get rid of @AEW? what’s even the point going there if you’re not checking for @Brodyxking figures?!?

[marcel - at gtc @mrclbschff]

wtf did i just watch

[kmdr @kmdrfx]

OPENCODE-WEEKLY #420/1

[Elliot Arledge @elliotarledge]

https://t.co/tarbZu8xvi

[Daniel @growing_daniel]

Parents: "Move out"

Boss: "Work harder"

Claude: "You're absolutely right, I did delete the repository, and that's my mistake"

[NVIDIA AI @NVIDIAAI]

Today we're shipping Nemotron 3 Ultra.

A 550B MoE frontier-intelligence open model built for long-running agents.

It delivers 5x faster inference and lowers the cost of complex agentic tasks by up to 30% versus other open frontier models.

[marcel - at gtc @mrclbschff]

@kenwheeler vague memories

[dax @thdxr]

someone made a fork of opencode that routes through the unsecured ai endpoints from chipotle

[marcel - at gtc @mrclbschff]

@kenwheeler @IKnowSoftware full eastern europe outfit

[marcel - at gtc @mrclbschff]

@jxnlco 5.5 didnt picked me i knew its crooked 😘

[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.

[marcel - at gtc @mrclbschff]

@edwin_mccallum @SemiAnalysis_ I thought that was the consensus

[marcel - at gtc @mrclbschff]

@SemiAnalysis_ Gemini 3.5 Flash is good or something like this 😂

[marcel - at gtc @mrclbschff]

@thsottiaux Make it dirt cheap I can see a use case.

[marcel - at gtc @mrclbschff]

@wesbos Iron Heart

[autist @litteralyme0]

stfu here’s Ryan Gosling driving for 4 hours:

[marcel - at gtc @mrclbschff]

i miss access to a chalkboard, nil

[Dwarkesh Patel @dwarkesh_sp]

New blackboard lecture w @reinerpope

How do chips actually work – starting with basic logic gates, and working up to why GPUs, TPUs, FPGAs, and the human brain each look the way they do.

0:00:00 – Building a multiply-accumulate from logic gates
0:16:20 – Muxes and the cost of data movement
0:25:59 – How systolic arrays work
0:39:00 – Clock cycles and pipeline registers
0:51:40 – FPGAs vs ASICs
1:03:14 – Cache vs scratchpad
1:07:16 – Why CPU cores are much bigger than GPU cores
1:11:49 – Brains vs chips
1:15:22 – A GPU is just a bunch of tiny TPUs

Look up Dwarkesh Podcast on YouTube/Spotify/etc to watch. Enjoy!

[WarrenBuffering @WarrenInTheBuff]

when I wrote code by hand in neovim

[marcel - at gtc @mrclbschff]

@kenwheeler someone told 4yo seal is foca in spanish and now he runs around the house saying: foca! foca! not a bad word i mean the animal. no complains from preschool so far

[marcel - at gtc @mrclbschff]

@kenwheeler I forgot init … 90% times it’s probably just init

[marcel - at gtc @mrclbschff]

@kenwheeler my commit messages used to be wip/some progress/tbt/works