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Quoting command line arguments the wrong way (2011)
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Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,943 posts.
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Designing a better strcpy
Saagar Jha's website.
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ODROID-C2 Compared to Raspberry Pi 3 and Orange Pi Plus
tl;dr: The ODROID-C2 is a very solid competitor to the Raspberry Pi model 3 B, and is anywhere from 2-10x faster than the Pi 3, depending on the operation. The software and community support is nowhere near what you get with the Raspberry Pi, but it's the best I've seen of all the Raspberry Pi clones I've tried. The…
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Rootless Pings in Rust
Sending a ping by creating an ICMP socket normally requires root: you can’t create a raw socket to send ICMP packets without it. The ping command line tool works without root however, how is that possible? It turns out you can create a UDP socket with a protocol flag, which allows you to send the ping rootless. I…
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I wish systemd logged information about the source of “transactions”
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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Tried Nvidia’s GTX 1080 – still no external GPU on a Pi
Earlier today I did a livestream on my YouTube channel to attempt using an Nvidia GeForce GTX 1080 on a Raspberry Pi Compute Module 4. As with all my testing, I'm documenting everything I learn in this GitHub issue, which is part of the Raspberry Pi PCI Express Card Database website. It's only been a few hours, but…
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Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
See how AWS Lambda arm64 stacks up against x86_64 in real-world benchmarks across CPU, memory, and I/O workloads using Node.js, Python, and Rust.
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UEFI Secure Boot on the Raspberry Pi
UPDATE: this post unexpectedly ended up on Hacker News and I received a lot of comments. The two most important points being made are (1) that Secure Boot on the RPi as …
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Three years later, Mr. Moore is still letting us punt on database sharding
Three years ago, I wrote about how improvements in technology keep allowing us to punt on sharding the Basecamp database. This is still true, only more so now. We’ve grown enormously over the last three years but RAM keeps getting cheaper and FusionIO SSD’s keep getting faster. If an…
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RaptorQ and performance optimization in Rust
I recently decided to learn more about Rust, and wrote a high performance RaptorQ (RFC6330) library. RaptorQ is a fountain code, and the core of the algorithm is a lot of matrix math over GF(256) – which translates into lots of XORs and reads from lookup tables. After getting the initial implementation working, I set…
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Network Latencies and Speed of Light
In this short post I’m going to attempt to convince you that current network (Internet) latencies are here to stay, because they are already within a fairly small factor of what is possible u…
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Gzip decompression in 250 lines of Rust
i wanted to have a deeper grasp of how compression works, so i wrote a gzip decompressor from scratch. the result is about 250 lines of rust that can decompress gzip from a file or stdin.
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V7 Unix had no stack size limit, and when Unix acquired one
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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Nebula is not the fastest mesh VPN, but neither are the others
(But neither are any of the others)
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More than you ever wanted to know about font loading on the web (2021)
When I started thinking about writing a post about web font loading my intention was to propose relatively sophisticated ideas that I've...
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6th generation x86 CPU Comparisons
Paul Hsieh's 6th generation x86 CPU comparision page including K6, P-II and 6x86MX geared towards the high performance software developer audience
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Native ZFS VDEV for Object Storage (OpenZFS Summit)
We presented MayaNAS at OpenZFS Developer Summit 2025, introducing objbacker.io—a native ZFS VDEV for object storage. No FUSE, direct kernel-to-SDK integration achieving 3.7 GB/s throughput.
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Beyond OpenMP in C++ and Rust: Taskflow, Rayon, Fork Union
Most C++ and Rust thread pools run 10x slower than OpenMP on fork-join workloads. Fork Union closes the gap to 20% with 300 lines, dodging mutexes and CAS.
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Jepsen: Crate 0.54.9 version divergence
In the last Jepsen analysis, we saw that RethinkDB 2.2.3 could encounter spectacular failure modes due to cluster reconfiguration during a partition. In this analysis, we’ll talk about Crate, and find out just how many versions a row’s version identifies.