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Recycling memory buffers in Go
This blog post is very old now. You probably don't want to use the techniques described here. GO'S sync.Pool is a better way to go.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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Vert.x native: how to run a JVM app in 10Mb of RAM
I’ve been working with GraalVM for a while now mostly on the Polyglot aspect, but some work has been done in the native image support. Today I’d like to shar...
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An Update on TinyKVM
Hey all. TinyKVM was open-sourced this february and since then I’ve been working on some things that are very much outside of the scope of…
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Searching statically-linked vulnerable library functions in executable code
Helping researchers find 0ld daysPosted by Thomas Dullien, Project ZeroExecutive summarySoftware ...
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The Great Renaming 1985 – 1988 (2000)
The Great Renaming FAQ
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An unusual 7400-series chip implemented with a gate array
When I look inside a chip from the popular 7400 series, I know what to expect: a fairly simple die, implemented in a straightforward, cost-e...
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Retina iMac owners can greatly improve graphics performance of many applications
Hmph! Not sure which one is "correct" there... hmm... If you use kCGImageAlphaPremultipliedFirst for the CGBitmapContext rather than kCGImageAlphaNoneFirst, then it looks closer to the original, maybe. ? Also other caveat: NSBitmapImageRep can't seem to deal with the ARGB format either, so if you use that you need to…
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Symbolic Execution: Intuition and Implementation
In this article I give a brief tour of a program analysis technique called symbolic execution. As the title indicates, I aim to explain both the intuition behind the technique, and also the details of a simple implementation. My intended audience is professional programmers who have no background in program analysis.
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NVMM: A full, fast and flexible virtualization stack for NetBSD
NVMM provides the infrastructure needed for both the kernel driver and the userland emulators.
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Dragon: A distributed graph query engine
Visit the post for more.
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Optimizing Top K in Postgres
How ParadeDB uses principles from search engines to optimize Postgres' Top K performance.
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Understanding the C/C++ memory model
I know that a lot of people struggle with understanding the memory model introduced in C11/C++11. In a recent conversation I was alerted to the existence of this blog post, which while correct (by …
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The Common Desktop Environment (CDE) in 2021
Published: 28-01-2021 | Author: Remy van Elst | Text only version of this article
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How QUIC is displacing TCP for speed
What is QUIC protocol and how does it work ?
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Optimizers need a rethink
Thoughts on how compiler and database optimizers should evolve in the future, focusing on predictability and guarantees instead of smarts and heroics
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I didn’t learn Unix by reading all the manpages (2022)
Originally drafted as a thread on hackers.town , after Abbie Normal asked me to expand on a side comment in a discussion of documentation .
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Golang's big miss on memory arenas
When your software team needs to pick a language today, you typically weigh two factors: language performance and developer velocity.
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Making Code Faster
I’ve enjoyed writing software for 40+ years now. Lots of activities fall into that “writing software” basket, and here’s my favorite: When you have a body of code with a decent unit-test suite and you need to make it go faster. This part of the Quamina diary is a case study of making a piece of the library faster.
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In Praise of ZFS on Linux's ZED 'ZFS Event Daemon'
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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Microservices and the First Law of Distributed Objects
In P of EAA I said "don't distribute your objects". Does this advice contradict my interest in Microservices?
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Hardening macOS (2018)
Quick and easy guide for securing macOS systems, for both laymen and security enthusiasts. Last updated for Golden Gate.
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OpenBSD Workstation Hardening
In this blog post, you will learn different methods to harden your OpenBSD system, and in which situation they are useful
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A Unix Utility to Know About: lsof (2009)
This is the third post in the article series about Unix and Linux utilities that you should know about. In this post I will take you through the useful lsof tool. If netcat was called the Swiss Army Knife of Network Connections, then I'd call lsof the Swiss Army Knife of Unix debugging. Lsof follows Unix philosophy...
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An Introduction to Lock-Free Programming (2012)
Lock-free programming is a challenge, not just because of the complexity of the task itself, but because of how difficult it can be to penetrate the subject in the first place. I …
4288
ZFS on a single core RISC-V hardware with 512MB
Is this feasible? Yes it is! OpenZFS on Linux compiled from sources for RISC-V, it will work with less than 250MB of RAM for a nearly fully filled 2TB zfs volume with 225.000 files! Even stressing the system and run in parallel (via Wifi): a…
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Why does zsh start so slowly?
I’m serious about shell startup speed. I use tmux to open and close tmux splits all day every day, so I need zsh to start quickly. I used to use frameworks like oh-my-zsh or prezto and while I was happy with the functionality they provided I wasn’t happy with their impact on my shell’s startup speed. So, what do we do…
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Shipping textures as PNGs is suboptimal
Are you shipping textures to players as PNGs? The goal of this post is to convince you that this is suboptimal, and walk you through a better approach.