Thomas Fuller

An inquisitive and enterprising autodidactic software developer and hedge fund engineer offering his notes to online passerby.

[Thomas Fuller @AutodidactKorey]

What I post and retweet here are primarily notes to myself about how to live excellently and honorably. However, it would also be noble if I were to share some of such notes with others, advancing me in my goal of leading a valuable life.

[Rik Arends @rikarends]

51 million lines of code. Chromium codebase. Here you go. 120hz, 3gb ram use.

[alexei @alexeixbt]

10 core principles of neuroplasticity:

1. use it or lose it: if you stop practicing a skill, your brain quietly prunes the wiring behind it. neuroplasticity cuts both ways.

2. use it or improve it: the more you practice something, the stronger those brain circuits get. that's neuroplasticity working for you instead of against you.

3. specificity: your brain adapts to exactly what you train. play chess, get better at chess. it doesn't just make you "smarter" in general.

4. reps matter: doing something once won't rewire anything. neuroplasticity needs repetition to actually stick.

5. intensity matters: focused, high effort practice creates way more brain change than casual, half effort practice.

6. timing matters: your brain has windows where neuroplasticity happens easier, like right after learning something new or recovering from injury.

7. it has to matter to you: your brain prioritizes what feels meaningful or rewarding. if you're bored or checked out, neuroplasticity slows way down.

8. age and state matter: neuroplasticity never fully shuts off, but sleep, stress, inflammation and age all change how easily your brain can rewire.

9. transference: getting better at one skill can spill over into related ones, especially if you're training the underlying fundamentals.

10. interference: cramming two competing skills back to back can mess with both. your brain needs a little space to lock in new learning.

[Barbarian Herodotus @BBHerodotus]

Napoleon on his early years in the regiment:

“Do you know how I managed? By never entering a café or going into society; by eating dry bread, and brushing my own clothes so that they might last the longer. I lived like a bear, in a little room, with books for my only friends... These were the joys and debaucheries of my youth”

[Quant Science @quantscience_]

this simple Python library retrieves data from TradingView Screener

it features a visual code generator that creates ready-to-run scripts for over 13,000 fields across stocks, crypto, forex, bonds, futures, and coins

get it here:

[Shubham Mishra 🐐 @shubh6200]

Pure goldmine for performance engineering.

I’ve been going through Algorithmica’s HPC series, and the CPU cache section is especially good.

It breaks down things like cache latency, memory access patterns, pointer chasing, prefetching, and what’s actually happening under the hood.

If you care about writing faster software, bookmark this.

https://t.co/2QnYMMTRgu

[Polymath Investor @polymathinvest1]

Munger called it a latticework.
Here are 35 mental models for looking at businesses through different lenses.

[alexei @alexeixbt]

metacognition, the ability to observe and understand your own thinking, is what neuroscience considers the highest form of intelligence. it is what separates reactive people from self aware ones.

when you can step back and notice why you are thinking what you are thinking, you gain the ability to change it.

most people live inside their thoughts. the rare few learn to watch them.

[Quant Science @quantscience_]

"You can teach a physicist finance but you cannot teach a finance person physics."

- Jim Simons

[Navalism @NavalismHQ]

"Twitter is television for intellectuals."

@naval

[Akash @kaaaash____]

Be honest,

Why is every software engineer’s backup plan always farming?

[Navalism @NavalismHQ]

Mathematics is the language of nature. Perhaps we can teach and learn it more easily as such.

@naval

[Navalism @NavalismHQ]

If the primary purpose of school was education, the Internet should obsolete it. But school is mainly about credentialing.

@naval

[Mustafa. @oprydai]

become a generalist.

specialization makes you efficient. generalization makes you dangerous.

what it actually means:

• learn across domains → math, physics, software, economics, biology. patterns repeat across fields.
• connect ideas → innovation happens at the intersection, not inside silos.
• adapt fast → when one field shifts, you don’t collapse, you pivot.
• see systems → specialists see parts, generalists see the whole
• build end-to-end → from idea → design → implementation → delivery

the world rewards specialists in stable environments.
it rewards generalists when things are changing.

right now, everything is changing.

don’t just go deep.
go wide, then stack depth where it matters.

[Quant Science @quantscience_]

A Bloomberg Terminal costs $30,000 a year.

Here's how to build 90% of it for free.

Wall Street doesn't advertise this. But every function that matters has a free alternative in Python.

Here's the DIY version (with Python):

[ₕₐₘₚₜₒₙ @hamptonism]

If you’re in your 20’s,

Build a powerful library.

[alexei @alexeixbt]

metacognition might be the closest thing to a real life superpower

[alexei @alexeixbt]

https://t.co/5n2FiRp1UZ

[alexei @alexeixbt]

think of your brain like a bank account.
every time you learn a new skill, challenge your mind, or exercise, you make a deposit.

neuroscientist professor anthony hannan calls this building a brain reserve powered by neuroplasticity.

when you stimulate your brain, neuroplasticity builds brand-new connections between your 100 billion neurons to protect you against stress, aging, and memory loss.

if you only rely on old routines, your brain account stays flat. start making daily deposits with new challenges, and your brain builds a vault of lifelong resilience.

read the key concepts below.

[Thomas Fuller @AutodidactKorey]

@AliAbdaal https://t.co/zMkxZQsGLx

[Arika @Arikalabs]

fork() is the most beautiful function ever written.

It takes zero arguments.
It returns twice.
It creates an entire process from nothing.

The entire Linux ecosystem containers, shells, servers is built on a function with this signature:
pid_t fork(void);
Sometimes the most powerful things need no configuration.