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Performant Front-End Architecture
Make your client-side apps load fast and provide a good user experience.
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The latest blog posts to take off on Hacker News. 533 posts.
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Memory Bandwidth Napkin Math
An exploration into C++ memory throughput performance.
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ThinkPad T480 is my new main laptop which runs FreeBSD
I’ve been using FreeBSD as my primary server OS for quite a long time. But, for unknown reasons, I have never seriously used it on client workstations. Maybe it’s partly because I’m a CUI-oriented person who loves doing things on text terminals as much as possible. Actually, I have been pretty happy with any client OS…
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Netflix Now Streaming AV1 on Android
By Liwei Guo, Vivian Li, Julie Beckley, Venkatesh Selvaraj, and Jeff Watts
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Why Discord is switching from Go to Rust
Discover the latest news and app updates, stories, company insights, and plenty more about Discord, all in one place.
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Allocator Designs
This post explains how to implement heap allocators from scratch. It presents and discusses different allocator designs, including bump allocation, li…
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Buffer overflow when pwfeedback is set in sudoers
Sudo’s pwfeedback option can be used to provide visual feedback when the user is inputting their password. For each key press, an asterisk is printed. This option was added in response to user confusion over how the standard Password: prompt disables the echoing of key presses. While pwfeedback is not enabled by…
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Is Catalina a Good Upgrade Yet?
Although 10.15.3 fixes a serious bug in Mail and Catalina is steadily maturing, there are many users who still shouldn’t upgrade.
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Writing a RISC-V OS in Rust: System Calls
System calls are a way for unprivileged, user applications to request services from the kernel. In the RISC-V architecture, we invoke the call using the ecall instruction. This will cause the CPU to halt what it's doing, elevate privilege modes, and then jump to whatever function handler is stored in the mtvec…
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Libc++'s Implementation of std::string
I. Introduction
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Jepsen: Etcd 3.4.3
The etcd key-value store is a distributed system intended for use as a coordination primitive. Like Zookeeper and Consul , etcd stores a small volume of infrequently-updated state ( by default, up to 8 GB ) in a key-value map, and offers strict-serializable reads, writes and micro-transactions across the entire…
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Command-line tools can be faster than a Hadoop cluster (2014)
Adam Drake is an advisor to scale-up tech companies. He writes about ML/AI/data, leadership, and building tech teams.
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Why ZFS is not good at growing and reshaping pools, or shrinking them
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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Some Useful Probability Facts for Systems Programming
Probability problems come up a lot in systems programming, and I’m using that term loosely to mean everything from operating systems programming and networking, to building large online services, to creating virtual worlds like in games. Here’s a bunch of rough-and-ready probability rules of thumb that are deeply…
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Postmortem of the failure of one hosting storage unit on Jan. 8, 2020
On January 8, 2020 at 14:51 UTC, one of our storage units used for our hosting services hosted at LU-BI1 went down.
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Distri: 20x faster initramfs (initrd) from scratch
In case you are not yet familiar with why an initramfs (or initrd, or initial ramdisk) is typically used when starting Linux, let me quote the wikipedia definition: “[…] initrd is a scheme for loading a temporary root file system into memory, which may be used as part of the Linux startup process […] to make…
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SQLite Is Serverless
Most SQL database engines are implemented as a separate server process. Programs that want to access the database communicate with the server using some kind of interprocess communication (typically TCP/IP) to send requests to the server and to receive back results. SQLite does not work this way. With SQLite, the…
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Ambitions for a Unix Shell
As discussed in the January blog roadmap , I want to concretely describe a reduced Oil language , and see if we can get it "done" in 2020.
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NeXTSTEP on the HP 712 Part 1: Installation
It’s been a long time since my last pizzabox post - over a year! There’s been a lot going on in my life but I’m excited that lately I’ve had a lot more free time , which means more time to explore the world of workstations and share with you!
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The Hunt for the Fastest Zero
Unexpected performance deviations depending on how you spell zero.
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FreeBSD is an amazing operating system
This is a small article about some of my adventures with FreeBSD and why I believe it is an amazing operating system.
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I've been working on X11 on jailbroken iOS
A guide on how to compile the X Window System for iOS
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Gathering Intel on Intel AVX-512 Transitions
Investigating some details of SIMD related frequency transitions on Intel CPUs.