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Going down the rabbit hole of Git's new bundle-URI
Git's new bundle-uri could help significantly speed up clones, but what bugs lurk within?
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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Systemd service sandboxing and security hardening (2020)
The systemd-analyze security command gives your systemd service units an automated security rating. This is a good starting point for security hardening.
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How We Designed for Performance and Scale
Deliver modern applications with NGINX. Explore high-performance load balancing, API gateways, and web server solutions trusted by top global enterprises.
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Structures in C: From Basics to Memory Alignment
Structures allow us to combine several variables to create a new data type. Some other languages support the same concept but call it “records”. If you come from object-oriented program…
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The cost of forsaking C
The C programming language is not trendy. The most recent edition of the canonical C text (the excitingly named The C Programming Language)…
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macOS to FreeBSD migration a.k.a. why I left macOS
This is not a technical documentation for how I migrated from macOS to FreeBSD. This is a high-level for why I migrated from macOS to FreeBSD.
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RabbitMQ vs. Kafka – An Architect’s Dilemma (Part 1)
RabbitMQ and Apache Kafka might appear similar but serve very different needs. Read to learn and make an informed decision suitable for your needs.
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A Simple ELF
The Ivory Tower is a blog about software engineering and development philosophy by Anders Sundman.
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The Road to 2M Websocket Connections in Phoenix
If you have been paying attention on Twitter recently, you have likely seen some increasing numbers regarding the number of simultaneous connections the Phoenix web framework can handle. This post documents some of the techniques used to perform the benchmarks.
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Avoiding Complexity with Systemd
Using systemd to avoid having to write some risky code
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Do we really need swap on modern systems?
Optimize virtual memory management in Red Hat Enterprise Linux: Learn how to configure swap for optimal performance
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Linux on Snapdragon X Elite: Linaro and Tuxedo Pave the Way for ARM64 Laptops
Linaro Connect 2025 showcases progress in bringing Linux on Snapdragon-Powered Devices
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Why Const Doesn't Make C Code Faster
In a post a few months back I said it’s a popular myth that const is helpful for enabling compiler optimisations in C and C++ . I figured I should explain that one, especially because I used to believe it was obviously true, myself. I’ll start off with some theory and artificial examples, then I’ll do some experiments…
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You need to be able to run your system
"Run the unit tests" doesn't count. The complexity of your system is in the interactions between the units.
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Python is Actually Portable
Gautham's Blog
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Even if you can't write assembly, you can read disassembly
This is a very concise introduction to x86 disassembly. It shows that you probably have all the skills to start reading disassembly right now even if you thought it was too complicated for you. It really isn't, see it for yourself.
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Landlock-Ing Linux
Landlock is a Linux API that lets applications explicitly declare which resources they are allowed to access. Its philosophy is similar to OpenBSD’s unveil() and (less so) pledge() : programs can make a contract with the kernel stating, “I only need these files or resources — deny me everything else if I’m…
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Wddbfs – Mount a SQLite database as a filesystem
Often when I’m prototyping a project, I hesitate to use a sqlite database despite their many adavantages . It seems much easier to just dump a bunch of files in a directory and to rely on the universal support for the filesystem API to read/delete/update records. Part of this is avoiding the overhead of figuring out a…
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Writing a register based VM in less than 125 lines of C code
This tutorial is intended for intermediate C developers who want to get some coding practice and, in the process, gain valuable insights into low-level programming and how (some) Virtual Machines operate under the hood. The reader should already be comfortable with bitwise operations, hexadecimal notation, pointers…
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The hunt for a cluster-killer Erlang bug (2021)
A 20 minute Kafka outage brought down our entire Erlang cluster for hours. How could this happen? Follow this fascinating investigation!
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Systemd by Example (2021)
The first article in a series where I explore aspects of systemd by creating small examples with the help of containers.
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To Message Bus or Not: Distributed Systems Design (2017)
Realize the speed, agility and performance of a scalable, composable web architecture with Netlify. Explore the composable web platform now!
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Finding the “second bug” in glibc’s condition variable
I continue to have no time for big programming projects, so here is a short blog post. Two years ago I looked into a bug in the glibc implementation of condition variables: Sometimes pthread_cond_s…
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Speed, scale and reliability: 25 years of Google datacenter networking evolution
Google networking leaders reflect on the milestones that led to Jupiter supporting 13 petabits per second bandwidth, and what comes next.
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No More Full Table Vacuums in PostgreSQL
I just committed a very important patch to PostgreSQL. The short summary for the patch is " Don't vacuum all-frozen pages. " and it follows...