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Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 498 posts.
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FUSE for macOS is no longer open source
And what that means for the rest of us.
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Htop Explained
Explanation of everything you can see in htop/top on Linux
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Adventures of putting 16 GB of RAM in a motherboard that doesn’t support it
A while ago, I put 16 GB of RAM into one of my computers. The computer is using a Foxconn P55MX motherboard with a Core i5 750. It’s old and could probably be replaced, but it still works for what I need.
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ZedRipper: A 16-core Z80 laptop
Meet the ZedRipper – a 16-core, 83 MHz Z80 powerhouse as portable as it is impractical. The ZedRipper is my latest attempt to build a fun ‘project’ machine, with a couple of goals in mind:
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Making the Tokio scheduler 10x faster
Tokio is a runtime for writing reliable asynchronous applications with Rust. It provides async I/O, networking, scheduling, timers, and more.
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A deep dive into iOS Exploit chains found in the wild
Posted by Ian Beer, Project ZeroProject Zero’s mission is to make 0-day hard. We often work...
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Local-first software: you own your data, in spite of the cloud
Local-first software: you own your data, in spite of the cloud Kleppmann et al., Onward! ’19 Watch out! If you start reading this paper you could be lost for hours following all the interesti…
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Details of the Cloudflare outage on July 2, 2019
Almost nine years ago, Cloudflare was a tiny company and I was a customer not an employee. Cloudflare had launched a month earlier and one day alerting told me that my little site, jgc.org, didn’t seem to have working DNS any more.
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PCI Express on the Raspberry Pi 4
After the daily dose of Hackaday - and with an idea that seemed very doable, and actually, with some improvements can be easily reproducible.
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Use mmap with care
When we implemented the git portion of Sublime Merge , we chose to use mmap for reading git object files. This turned out to be considerably more difficult than we had first thought. Using mmap in desktop applications has some serious caveats, and here's why:
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Writing an OS in Rust: Introduction to Paging
This post introduces paging, a very common memory management scheme that we will also use for our operating system. It explains why memory isolation i…
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The world in which IPv6 was a good design (2017)
Last November I went to an IETF meeting for the first time. The IETF is an interesting place; it seems to be about 1/3 maintenance grunt wo...
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The Raspberry Pi 4 needs a fan
December 2020 Update: Lo and behold, the Pi Foundation tacitly acknowledges the Pi needs a fan in the official case, because now they sell the Case Fan! The Raspberry Pi Foundation's Pi 4 announcement blog post touted the Pi 4 as providing "PC-like level of performance for most users". The Foundation even offers a…
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Undocumented Catalina file access change
It's well known that if you drag a file from Finder and drop it into Terminal, the full path of the file will output in Terminal. The same behavior occurs with copy and paste too. This has always been a very convenient but innocuous operation… until macOS 10.15 Catalina. I've discovered that on Catalina, pasting a…
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Achieving 100k connections per second with Elixir
In this article, we explain how to scale Elixir to handle 100k connections per second.
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The cost of parsing JSON
The dominant costs of processing JavaScript are download and CPU execution time.
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Dramatically reduced power usage in Firefox 70 on macOS with Core Animation
In Firefox 70 we changed how pixels get to the screen on macOS. This allows us to do less work per frame when only small parts of the screen change. As a result, Firefox 70 drastically reduces the …
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New In Postgres 12: Generated Columns
pgDash is an in-depth monitoring solution designed specifically for PostgreSQL deployments. pgDash shows you information and metrics about every aspect of your PostgreSQL database server, collected using the open-source tool pgmetrics.
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Oxide Computer Company: Initial boot sequence
Introducing the Oxide Computer Company!
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When setting an environment variable gives you a 40x speedup
Today, we'd like to share some of our recent work on Sherlock that allowed a pretty significant speedup when listing files in directories with a lot of entries. > Unlike our usual announcements, this post is more of a behind-the-scenes...