~betterdevlink | Bookmarks (154)

How Core Git Developers Configure Git In this post, I’ll go through some of the perhaps obscure Git config settings that I have personally globally enabled and go into them to explain what they do and why they should probably be the default settings.

Hacking chromecast Do you want to be able to discover chromecast device on your network and broadcast arbitrary media to it? Sure, there is many tools to do it. But what is the protocol behind it. This is a 4 part series dive into that. We will learn the basic, the protocol, the casting server and gotcha.

What would happen if we didn't use TCP or UDP? Switches, bridges, routers, load balancers, firewalls—these network boxes keep the internet running. Routing, blocking, mirroring, duplicating and deduplicating traffic in ways most people never think about. Without them, this document wouldn’t have reached you

Performance Speed Limits Sometimes you just want to know how fast your code can go, without benchmarking it. Sometimes you have benchmarked it and want to know how close you are to the maximum speed. Often you just need to know what the current limiting factor is, to guide your optimization decisions.

Scaling with PostgreSQL without boiling the ocean Scaling PostgreSQL successfully doesn’t always require a full team of DBAs and experts. The beauty of PostgreSQL is that solutions often lie within the database itself - by rethinking your data access patterns from first principles, you can solve many business problems at scale.

The power of interning: making a time series database 2000x smaller in Rust interning is a technique of storing only one copy of each unique piece of data in memory.Very common use in string so we don’t need to store the string multiple time. Imagine big JSON document with repeated field. In this post we look into a time series database and how interning...

opendbc Python API for your car. Control the gas, brake, steering, and more. Read the speed, steering angle, and more.

rumale a machine learning library in Ruby. Rumale provides machine learning algorithms with interfaces similar to Scikit-Learn in Python.

termo a simple terminal emulator that can be used to create a terminal-like interface on your website

Pixel Federation Swaps Amazon MSK for WarpStream, Saves 83% on Apache Kafka Costs The video game company Pixel Federation uses Kafka as the message bus to power its real-time data streaming infrastructure. However, they were leveraging Amazon MSK and their bill was growing faster than their data volumes and they had to use complex networking like VPC peering. By switching to WarpStream, they saved...

Operating System in 1,000 Lines build a small operating system from scratch, step by step. You might get intimidated when you hear OS or kernel development, the basic functions of an OS (especially the kernel) are surprisingly simple. Even Linux, which is often cited as a huge open-source software, was only 8,413 lines in version 0.01. Today’s Linux kernel is overwhelmingly large, but it...

A 2-ply minimax chess engine in 84,688 regular expressions So without further ado, I present to you … Regex Chess: sequence of 84,688 regular expressions that, when executed in order, will play a (valid; not entirely terrible) move given a chess board as input.

Mistakes engineers make in large established codebases Working in large established codebases is one of the hardest things to learn as a software engineer. You can’t practice it beforehand (no, open source does not give you the same experience). Personal projects can never teach you how to do it, because they’re necessarily small and from-scratch.

Seconds Since the Epoch People, myself included, like to say that POSIX time, also known as Unix time, is the number of seconds since the Unix epoch, which was 1970-01-01 at 00:00:00. This is not true. Or rather, it isn’t true in the sense most people think. For example, it is presently 2024-12-25 at 18:51:26 UTC. The POSIX time is 1735152686. It has been...

How NAT traversal works How 2 devices under a NAT can connect directly to each other without a server beind in the middle to relay traffic?

Writing a simple pool allocator in C When you need memory for your program, you can malloc. Similarly to malloc, a pool allocator allows the user to allocate memory at run time. The pool allocator, however, is much faster than malloc1, at the cost of having a fixed pool size. It allows the user to allocate and free memory blocks (referred to as chunks,...

B-Trees: More Than I Thought I'd Want to Know B-Trees were essentially “better” Binary Search Trees, with some hand-waving done that they had improved performance when used in database applications. But it’s more than just that, today we will look into disk constraint, slotted pages to see how B-Tree node fit naturally into a page - a chunk of data that the harddrive read...

Breaking Up with Long Tasks or: how I learned to group loops and wield the yield Arrays are in every web developer’s toolbox, and there are a dozen ways to iterate over them. Choose wrong, though, and all of that processing time will happen synchronously in one long, blocking task. The thing is, the most natural ways are the wrong ways.