27 June 2026

24 links · Saturday

Data Access Patterns That Makes Your CPU Really Angry

Given an array of data, what is the slowest way to sum up the integers? Is it adding the numbers from left to right, adding them randomly, or doing something else? In this post, we are going to build a data access pattern from the ground up that sums numbers a…

My addiction with trading apps

The first thing I do when I wake up every morning is to open the stock app and check my watchlist. It’s a habit I developed and reinforced over the past few years. Admittedly, it’s very time and energy consuming. Many times, I’m not trying to actively trade, i…

PRs and LLMs

We are hiring at Feldera, so I have been talking to many software engineers. These calls tend to reveal where the “meta of software engineering” is at. Often the signal is that there isn’t a good signal and people are looking for new opportunities for various …

A Perfect Meritocracy Will Have Limited Social Mobility

I’ve increasingly been hearing people assume or claim that meritocracy and social mobility go hand-in-hand. Their argument often goes like this: In a world driven by nepotism, cronyism, bribery etc…

Voting with Feet

Where you live, pay taxes, and put down roots is its own kind of vote – and staying is a way of adding value to a place.

"No, I swear I wrote this."

LLMs have gotten very good. It's impossible tell anymore if something was written by a human or a model. AI detectors are snake oil. Nobody trusts each...

Fintech Engineering Handbook

Welcome to the Fintech Engineering Handbook. This resource aims to describe the most important patterns used in software engineering, where money is the primary focus of the system. It can be read in full to get a comprehensive understanding or in parts when d…

GitHub - bikini/exploitarium: A single archive of public exploit PoCs and vulnerability research writeups. At the time I post these, none have been reported. Feel free to report them yourself and take credit for the CVE if handed out lulz. Please do not abuse these. I do this so to allure people into the field, and I've always found this is the most efficient way.

A single archive of public exploit PoCs and vulnerability research writeups. At the time I post these, none have been reported. Feel free to report them yourself and take credit for the CVE if hand...

Saying the obvious thing

Stating the obvious is surprisingly useful. Most of your knowledge lives below the threshold of conscious awareness, so it’s possible for a piece of writing to remind you of what you already know. It’s common to know you don’t like something without being quit…

Om

This is going to sound cornier than a bucket of Jiffy-Pop, but it is a profound irony that a man with such a big and beautiful figurative heart could have such a lousy literal one.

We Can Still Stop California’s 3D Printer Surveillance Scheme

Ignoring EFF’s warnings about the dangers and impossibility of implementing a new mandate for 3D print surveillance software, the California State Assembly has signed off on legislation to do just that. In the process, legislators amended the bill to make it e…