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Cold restart whole system after total outage
"What are folks’ views on systems so large where cold-starting the whole system is almost impossible?"... — M'colleague, Shivam, In A Slackroom Next Door.
New
The latest blog posts to take off on Hacker News. 4,387 posts.
1292
Bfs 3.0: The Fastest Find Yet
bfs is a tool I wrote to do b readth- f irst s earch through a filesystem. It started out simply enough, but over the years it’s grown to include almost every feature from every other find implementation I could find, plus many of its own innovations. The new 3.0 release series includes the biggest new feature so far…
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Payment systems while working at a pizza place
Placing an order and capturing a payment are really different actions. I also learned a lot in a few days.
1294
What's wrong with enterprise Linux
An examination of what is wrong with the Enterprise Linux model and a recommendation for a middle ground.
1295
Minify and Gzip (2022)
I've been doing a bit of work cleaning up the CSS on this blog in the past couple days — the CSS is from a template that I copied more than five years ago at this point, and it was pretty crufty even when I first got it.
1296
Why can’t you just roll back from a bad macOS update?
If it’s so easy to uninstall a troublesome RSR, why can’t we simply roll back to a previous version of macOS, like we did in High Sierra?
1297
Gallery of Processor Cache Effects
Most of my readers will understand that cache is a fast but small type of memory that stores recently accessed memory locations. This description is
1298
Patching GCC to build Actually Portable Executables
Gautham's Blog
1299
Understanding Kafka with Factorio (2019)
While playing Factorio the other day, I was struck by the many similarities with Apache Kafka.
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Storing Data in Control Flow
A decision that arises over and over when designing concurrent programs is whether to represent program state in control flow or as data. This post is about what that decision means and how to approach it. Done well, taking program state stored in data and storing it instead in control flow can make programs much…
1301
Back-end parallelism in the Rust compiler
This post describes some performance work I have been doing recently on rustc. I spent several weeks on a particular problem with only a small amount of success. I hope a write-up will be interesting and educational, and may even lead to suggestions that make things better. The post is aimed at readers with some…
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1303
NixOS and my descent into insanity
As I tend to do, I picked a topic to write about that is much larger in scope than I could manage in a reasonable amount of time. Did I learn? Apparently...
1304
How small is the smallest .NET Hello World binary?
Here is a dumb question that you probably never asked yourself: What is the minimal amount of bytes we need to store in a .NET executable to have the CLR print the string"Hello, World!" to the standard output?
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{n} times faster than C
Owen's personal website and portfolio
1306
Things that surprised me while running SQLite in production
I've been using SQLite in several production projects for six months, and I've encountered some surprising aspects.
1307
Parsing time stamps faster with SIMD instructions
In software, it is common to represent time as a time-stamp string. It is usually specified by a time format string. Some standards use the format %Y%m%d%H%M%S meaning that we print the year, the month, the day, the hours, the minutes and the seconds. The current time as I write this blog post would be … Continue…
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Flattening ASTs and other compiler data structures
This is an introduction to data structure flattening, a special case of arena allocation that is a good fit for programming language implementations. We build a simple interpreter twice, the normal way and the flat way, and show that some fairly mechanical code changes can give you a 2.4× speedup.
1309
Twitter bug causes self-DDoS, related to Musk’s emergency blocks, rate limits
An "amateur hour" Javascript bug is self-DDOSing Twitter, sending infinite requests from users related to — or possibly even causing — Elon Musk's "temporary emergency measures" to stop web scraping.
1310
How does Linux handle writes?
I examine the somewhat surprising way how Linux handles writes.
1311
Wayland is pretty good
I started working on Flyaway with the intention of becoming familiar with Wayland, its protocols and extensions, and the wlroots library. Instead, I ended up genuinely liking all three.
1312
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…
1313
Fast machines, slow machines
Well, that was unexpected. I recorded a couple of crappy videos in 5 minutes, posted them on a Twitter thread, and went viral with 8.8K likes at this point. I really could not have predicted that, given that I’ve been posting what-I-believe-is interesting content for years and… nothing, almost-zero interest. Now that…
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FreeBSD Jails Containers
FreeBSD networking and containers (Jails) stacks are very mature and provide lots of useful features … yet for some reason these features are not properly advertised by the FreeBSD project &#…
1315
I Built Linux from Scratch
Linux From Scratch or LFS is a project that provides and maintains a set of instructions of how to build your own Linux system from scratch. I am always curious to understand how things work ‘under the hood’, and since I’m a daily Linux user i decided to take on the challenge to try and complete building Linux From…
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macOS command-line tools you might not know about
A comprehensive reference for advanced command-line utilities that provide unique macOS functionality.
1317
Optimizing a ring buffer for throughput (2021)
In this article I will take a look at the classic concurrent ring buffer and how it can be optimized to increase throughput.
1318
Build your own Docker with Linux namespaces, cgroups, and chroot
Take a practical approach to containerization as we guide you through the step-by-step process of building your own Docker-like environment using Linux namespaces, cgroups, and chroot. Dive into the code and command examples to gain a deeper understanding of how these technologies work together to create isolated and…
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Time is not a synchronization primitive
Xe Iaso's personal website.
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Make your programs run faster by better using the data cache (2020)
We investigate how the data cache influences the performance of your program, talk about ways for you to write faster programs by better leveraging the data cache.