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Saving a Third of Our Memory by Re-Ordering Go Struct Fields (2020)
Simply changing the order of some uint variables we managed to drop our memory usage significantly
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The latest blog posts to take off on Hacker News. 21,827 posts.
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UUIDs are popular, but bad for performance (2019)
MySQL UUIDs are still very popular despite a majority of posts warning against their usage. Learn what UUIDs are and why they are very bad for MySQL performance.
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A routine gem update ended up creating $73k worth of subscriptions
On November 5, 2021 (a Friday of course), we've deployed innocent-looking gem updates. Minor versions of Ruby on Rails, Ruby Sentry client, Ruby Slack client, http libraries, Puma, Devise, OmniAuth Ruby client, Mongoid, and a few test gems. However, something went very wrong. We saw odd Stripe errors
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Why “process substitution” is a late feature in Unix shells
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
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Vim prank: alias vim='vim -y'
Vim easy mode is tough to use for seasoned users!
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Fortran is easy to learn
Some may think Fortran is an archaic language, and certainly not one that should be taught, but in any respects modern Fortran is an exceptionally good language to teach programming in. Certainly b…
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Paxos
Use two consensus building phases to reach safe consensus even when nodes disconnect
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Zero-downtime schema migrations in Postgres using Reshape
About six months back, I wrote a post on how to use views in Postgres to encapsulate tables and create a versioned interface to a database. At the end of the…
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Elixir and Machine Learning: Nx v0.1 released
A huge milestone towards Elixir and Machine Learning has been reached with the release of Nx v0.1
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Problems once solved by a metaclass can be solved by __init_subclass__
David Beazley on Twitter said:
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Do Not Log
Almost every week I accidentally get into this logging argument. Here’s the problem: people tend to log different things and call it a best-practice. And I a...
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Know how your org works, or how to become a more effective engineer
A few months ago, exhausted by a constant stream of people perennially disappointed about reward structures at companies, I made what…
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The Pragmatic Pragmatic Programmer
The Pragmatic Pragmatic Programmer - Rogério Chaves
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Neural network from scratch
In this edition of Napkin Math, we’ll invoke the spirit of the Napkin Math series to establish a mental model for how a neural network works by building one from scratch. In a future issue we will do napkin math on performance, as establishing the first-principle understanding is plenty of ground to cover for today!
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How to mentor software engineers
Mentors should operate at three levels: goals, situations, and skills.
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Rewriting Libimagequant in Rust for Portability
libimagequant is a library for generating high-quality palettes, useful for compression of transparent PNG images (~75% smaller!) and making nice GIF animations .
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Understanding UUIDs, ULIDs and string representations
What UUIDs and ULIDs are under the hood, and how to encode and use them.
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Programming in 1987 versus Today
Many developers today have no idea what programming was like in the 80s.
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Porting Rust's Std to Rustix
A blog by sunfishcode
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No code reviews by default
How we built an engineering culture based on trust that allows us to move incredibly fast without requiring code reviews.
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How programmers make sure that their software is correct
Our most important goal in writing software is that it be correct. The software must do what the programmer wants it to do. It must meet the needs of the user. In the business world, double-entry bookkeeping is the idea that transactions are recorded in at least two accounts (debit and credit). One of the … Continue…
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The joy of building a ray tracer, for fun, in Rust
TLDR? You can find the code and a bunch of examples on GitHub at dps/rust-raytracer. Over the holiday break, I decided to learn Rust. Rust is a modern systems programming language which has a really interesting type system. The type system can catch broad classes of common programming mistakes - e.g. ensuring memory…
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C Runtime Overhead (2015)
What do you do when libc is your bottleneck? If the total runtime of your process is under 10ms, most of this time (depending on your hardware) is spent waiting for the linker and C runtime to set things up. If you compare this to the Latency Numbers Every Programmer Should Know , it falls right above "disk seek" and…
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Write Like You Code
Similarities between good writing and good code.
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An Algorithm for Passing Programming Interviews (2020)
Over the past few years, I’ve interviewed with a dozen or so companies and have completed ~50 or so individual algorithm problems. I’m frequently given feedback that I did a great job at the algorithms problem. In this post, I’m going to share how exactly I approach algorithm problems. Thought Process A guiding…
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Notes on BPF and eBPF
Notes on BPF & eBPF