System Architecture

Introduction Hashtables are one of the building blocks of computer science, and deservedly get a lot of attention - but less so within the JVM ecosystem. Part of this may simply be that most JVM code is not written with performance top of mind, or that the default JRE implementation is all-around reasonable - fast, efficient, resistant against attacks, why fix it if it ain’t broke? Today we’re looking at libraries that are interested in squeezing out every last byte and cycle of performance however, and we’ll be focusing specifically on primitive hashtables.

Build a Merkle tree AIR script in Plonky3 with Poseidon2, SubAirBuilder, constraints, trace generation, and Merkle proof verification for STARK ZK developers.

Time is where application code meets uncertainty: clock skew, wall-clock corrections, ambiguous ordering, late schedulers, and business-calendar boundaries.

The network is where application code meets uncertainty: latency, retries, timeouts, duplicate side effects, degraded states, and ambiguous outcomes.

Learn how Linux's transparent proxying works by building a toy proxy server in C.

Practical notes on building fast, reliable software systems that scale. Posts are a mirror of my LinkedIn & Blog content.

The following guide to airfreight containers, also called Unit Load Devices (ULD), has been developed from materials supplied by...

In the early 1990s, Don’t Copy That Floppy was an anti-piracy campaign that attempted to connect with computer-savvy youth through the power of hip-hop. While somewhat difficult to imagine gi…

The Modern Data Company produces DataOS, an operating system for data that provides a set of tools a ...

'Idempotent' may be jargon, but the term performs an important job in HTTP as a hall pass that gives ...

Do I have a favorite standard? Silly question. How could I not? There are so many great ones, each with its own weirdly fascinating story. In a previous job, I spent a lot of time getting to know E…

I got tired of using onetimesecret.com so I built my own secret sharing service. It has zero dependencies, only standard Web APIs, and the backend...

Build beautiful, responsive emails using HEEx components and Tailwind. A direct port of react-email, engineered for the Elixir ecosystem.

A glossary of common animation patterns, so you know what to ask for.

economic theory that wealth of resources slows national growth

TL;DR: A good tool is and ought to be invisible—striving to make such tools is the goal of a toolmaker.One habit I see a lot, and have to push back on, is taking a tool's shortcomings and reselling them as a "puzzle game" which is "fun" to solve.I don't want my tools to be "fun". I want my tools to be invisible.Text Editor WarsLet's take vim as an example  This is just an example, and applies to other editors too.. I constantly see some people praise it not for what actually makes it good, but by taking the things ...

What hash function to use? Any of the following: SHAKE256 with a 512-bit output TurboSHAKE256 with a 512-bit output SHA3-512 SHA-512 BLAKE3

Generate production-grade API infrastructure from your OpenAPI spec. SDKs, validators, query hooks, and 20+ plugins across TypeScript and Python. Free and open source.

standard for assessing computer system vulnerabilities

Independent blog posts, ranked by the community. Good stuff bubbles up. The rest pops.

Traceability in supply chains is a growing security concern. While Verifiable Data Structures (VDSs) have addressed specific issues, such as equivocation over digital certificates, they lack a universal architecture for all supply chains. This document defines such an architecture for single-issuer signed statement transparency. It ensures extensibility and interoperability between different transparency services as well as compliance with various auditing procedures and regulatory requirements.

CBOR Object Signing and Encryption (COSE) Receipts prove properties of a Verifiable Data Structure (VDS) to a verifier. VDSs and associated Proof Types enable security properties, such as minimal disclosure, transparency, and non-equivocation. Transparency helps maintain trust over time and has been applied to certificates, end-to-end encrypted messaging systems, and supply chain security. This specification enables concise transparency-oriented systems by building on Concise Binary Object Representation (CBOR) and COSE. The extensibility of the approach is demonstrated by providing CBOR encodings for Merkle inclusion and consistency proofs.

Fast single node rate limiter implementing Token Bucket algorithm.

LifeOS is the open-source Life Operating System. Memory, skills, hooks, agents, voice — yours, local, sovereign.