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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.
New
The latest blog posts to take off on Hacker News. 6,947 posts.
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Apple's list of 235 apps that are incompatible with macOS Catalina
A bundle called IncompatibleAppsList.bundle found in /Library/Apple/Library/Bundles/ in macOS Catalina contains a of list of 235 apps that are incompatible with Catalina.
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Mail Data Loss in macOS 10.15
I’m working on more posts about the Catalina release, but I wanted to start with a short warning. I’ve heard a bunch of reports of data loss in Apple Mail. Thankfully, none seem to be caused by my apps . (Ironically, one of the bugs I’ve encountered is the inability to delete messages via AppleScript.) And, in fact…
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SerenityOS: From Zero to HTML in a Year
The Serenity operating system turns 1 year old today. I'm counting from the first commit in the git repository , on October 10, 2018. Parts of the code had been around for a while before that, so this first commit was really about putting everything I was tinkering with into a shared repo.
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The PDP-7 Where Unix Began
Serial Number of First Unix System In preparation for a talk on Seventh Edition Unix this fall, I stumbled upon a service list from DEC fo...
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VxWorks now with C++17 and Rust support, alongside Ada and SPARK
Wind River announces Wind River Professional Services has been appraised at Level 3 of the CMMI® Institute’s Capability Maturity Model Integration.
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Guix Reduces Bootstrap Seed by Half
Blog posts about GNU Guix.
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Collapse OS — Bootstrap post-collapse technology
I expect our global supply chain to collapse before we reach 2030. With this collapse, we won't be able to produce most of our electronics because their production depends on a very complex supply chain that we won't be able to achieve again for decades (ever?).
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Why isn't my time zone highlighted on the world map?
In the original release of Windows 95, you could change your time zone by clicking on the map, and the time zone you selected would highlight. Similarly,
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A fast alternative to the modulo reduction (2016)
Suppose you want to pick an integer at random in a set of N elements. Your computer has functions to generate random 32-bit integers, how do you transform such numbers into indexes no larger than N? Suppose you have a hash table with a capacity N. Again, you need to transform your hash values (typically 32-bit ……
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Picolibc – Libc for Embedded Systems
I wrote a couple of years ago about the troubles I had finding a good libc for embedded systems , and for the last year or so I've been using something I called 'newlib-nano', which was newlib with the stdio from avrlibc bolted on. That library has worked pretty well, and required very little work to ship.
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How much faster is Redis at storing a blob of JSON compared to Postgres?
tl;dr; Redis is 16 times faster at reading these JSON blobs.*
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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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On Sharding
If you need to handle really a lot of traffic, there’s only one way to do it: sharding. Which is to say, splitting up the incoming requests among as many hosts (or Lambda functions, or message brokers, or data streams) as you need. Once you get this working you can handle an essentially unlimited request volume. Of…
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Designing far memory data structures: think outside the box
Designing far memory data structures: think outside the box Aguilera et al., HotOS’19 Last time out we looked at some of the trade-offs between RInKs and LInKs, and the advantages of local in…
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Performance metrics for web apps
Performance metrics are surprisingly challenging to get right. Here we share how to create metrics that are accurate, precise, and useful!
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Google Chrome Keystone is modifying /var symlink on non SIP Macs causing k-panic
Reports that some AVID Users Macs would no longer boot. It now may be that a Google Chrome Keystone update modifies /var on NON SIP Protected Macs.
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ReactOS 0.4.12
ReactOS is a free, opensource reimplementation of windows
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CentOS Stream
Today, Red Hat has introduced a new Linux development model into the CentOS community: CentOS Stream, a developer-forward, faster-moving distribution that helps community members, partners and others take full advantage of open innovation.
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How did MS-DOS decide on two seconds to keep the floppy disk cache valid?
A stopwatch and a race against time.