I've started working on a new edition of Ruby Under a Microscope that covers Ruby 3.x. I'm working on this in my spare time, so it will take a while. Leave a comment or drop me a line and I'll email you when it's finished. The Ruby team has done a tremendous amount of work over the past decade on Ru...

In graph theory, an adjacency matrix is a square matrix used to represent a finite (and usually dense) graph. The elements of the matrix indicate whether pairs of vertices are adjacent or not, and in weighted graphs, they store the edge weights. In many beginner-level tutorials, adjacency matrices a...

Introduction If your application uses MySQL and you’re interested in getting the best out of it via performance tuning and monitoring, then Releem is a very nice tool that can assist you in your endeavor. I discovered Releem from Roman Agabekov’s posts on social media. Roman is the founder of this t...

Your production database is tried and tested and likely bulletproof. Merely mentioning migrating to a new provider would likely set off multiple alarms, so don’t, use a Neon Twin instead. In this post, I’ll show you how to create a partial copy of your production database so you and your team can st...

Claude 3's integration with AWS infrastructure is reshaping enterprise AI adoption and challenging OpenAI's market dominance. Here’s what business leaders need to know as they evaluate their cloud and AI strategies.

Friday, February 14th is my last day at Amazon. I’ve been at Amazon for over 5½ half years, and it’s been a great run. I came from 8 years of leading technology at Artsy, and wanted to go back to coding. I found a Principal Engineer role to help launch the new AWS Data Exchange service. I was excite...

If you are interested in how I over-engineered the process of making a tiny book for my wife, using AI, a pen plotter, a 3D printer, and a lot of time, you are in the right place. The book is titled The Tiny Book of Great JoysMala Knjiga Velikih Radosti in Serbian, and here is how it turned out: My ...

What is the order of null in sql? Nestle in close, and I'll tell you.Showdev=# SELECT 1 AS value UNION SELECT null AS value ORDER BY value desc; value ------- 1 (2 rows) dev=# SELECT 1 AS value UNION SELECT 0 AS value ORDER BY value desc; value ------- 1 0 (2 rows)Tellasc means smaller to biggerdesc...

In this blog post, we explore how we can extract parts of compound types via the infer keyword. It helps if you are loosely familiar with conditional types. You can check out chapter “Conditional types” in “Exploring TypeScript” to read up on them.

A boldfaced lede like this was a sure sign you were reading a carefully choreographed EffortPost from our team at Fly.io. We’re going to do less of those. Or the same amount but more of a different kind of post. Either way: launch an app on Fly.io today! Over the last 5 years, we’ve done pretty well...

This whole paragraph is just one long sentence. God I love just random-ass blogging again. This bit by Geoffrey Huntley is super interesting to me and, despite calling out that LLM-driven development agents like Cursor have something like a 40% success rate at actually building anything that passes ...

It’s been nearly four years since I published Parsing Protobuf at 2+GB/s: How I Learned To Love Tail Calls in C. In that article, I presented a technique I co-developed for how to write really fast interpreters through the use of tail calls and the musttail attribute. While the article focused on Pr...

Happy February! Another release is here with several improvements across the board.

In his 2024 year-in-review, Luciano Mammino covers his work in Rust, serverless AWS projects, his contributions to open source projects like Middy, public speaking engagements, the AWS Bites podcast, and personal milestones.

A colleague of mine recently lent a hand implementing a polynomial approximation routine I could port to our compiler, though it wasn’t the method I was expecting. As I had written about previously, I was studying the Remez algorithm and implementing a prototype in Python. Remez approximation involv...

It’s not new, but it’s accelerating. People that used to say that LLMs were a fundamentally flawed way to reach any useful reasoning and, in general, to develop any useful tool with some degree of generality, are starting to shuffle the deck, in the hope to look less wrong. They say: “the progresses...

TypeDoc now lets us refer to parts of other files via {@includeCode}. In this blog post, I explain how that works and why it’s useful.

We are destroying software by no longer taking complexity into account when adding features or optimizing some dimension. We are destroying software with complex build systems. We are destroying software with an absurd chain of dependencies, making everything bloated and fragile. We are destroying s...

This week I attended the Jfokus software development conference in Stockholm, Sweden. I first went in 2011, and I have been back many times through the years. The conference has a Java focus (duh!), but many talks cover general topics … Continue reading →

TypeScript’s satisfies operator lets us check the type of a value (mostly) without influencing it. In this blog post, we examine how exactly it works and where it’s useful.

Most PG&E ratepayers don't understand how much higher the rates they pay are than what it actually costs PG&E to generate and transmit the electricity to their house. When I looked into this recently I was shocked. The average PG&E electricity charge now starts at 40 cents per kilowatt hour and goes...

When Czech President Petr Pavel traveled to the United States, our Product Manager, Jaroslav Polacek, was part of the official delegation. He presented MapTiler to various audiences, strengthened business connections, and helped establish our presence.

We’re interested in getting integrated into the flow VSCode uses to do remote editing over SSH, because everybody is using VSCode now, and, in particular, they’re using forks of VSCode that generate code with LLMs. ”hallucination” is what we call it when LLMs get code wrong; “engineering” is what we...

Dear RocksDB Community, We want to share an update about the bug that allowed our bug bounty researcher to update the release note title in August 2024 involving the RocksDB open-source repository on GitHub. This issue was found and responsibly disclosed to us by an external bug bounty researcher th...

This is the second part of a two three four-part series, which covers some recent results on “verifiable computation” and possible pitfalls that could occur there. This post won’t make much sense on its own, so I urge you to start with the first part. In the previous post we introduced a handful of ...

Back in 2020, when I worked in the supply chain side of Google, I had a fun and impactful side project related to human-level explanations of linear programs. A linear program is a mathematical model that defines some number of variables, linear constraints, and a linear objective function. When som...