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ReactOS 0.4.14
ReactOS is a free, opensource reimplementation of windows
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 553 posts.
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Speed Matters
I think that one of the most important things to focus on improving is how fast you can work.
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How Does FaceTime Work?
As an ex-pat living in Denmark, I use FaceTime audio a lot. Not only is it simple to use and reliable, but the sound quality is incredible. For those of you old enough to remember landlines, it reminds me of those but if you had a good headset. When
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Best practices can slow your application down
In order to get the most performant site possible when building the codebase for our public Stack Overflow site, we didn’t always follow best practices.
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Where's the fastest place to put my server? How much does it matter?
Using my own web server accesslogs and public latency data to get a quantitative answer and why roundtrips are such a pain.
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I'm unsure of the security of simultaneous multithreading on modern x86 CPUs
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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ZGC – What's new in JDK 16
JDK 16 is out, and as usual, each new release comes with a bunch of new features, enhancements and bug fixes. ZGC received 46 enhancements and 25 bug fixes. Here I’ll cover a few of the more interesting enhancements.
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Counting cycles and instructions on the Apple M1 processor
When benchmarking software, we often start by measuring the time elapsed. If you are benchmarking data bandwidth or latency, it is the right measure. However, if you are benchmarking computational tasks where you avoid disk and network accesses and where you only access a few pages of memory, then the time elapsed is…
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Spectre exploits in the "wild"
Personal blog of Julien (jvoisin) Voisin
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SiFive P550 Core: High-Performance RISC-V Processor
New SiFive Performance Family of application processors offers best in class performance, area, and efficiency for a wide variety of markets
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What should the CPU usage be of a fully-loaded CPU that has been throttled?
A valid difference of opinion.
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Fitting a FORTH in 512 bytes
Software is full of circular dependencies if you look deep enough. Compilers written in the language they compile are the most obvious example, but not the only one. To compile a kernel, you need a running kernel. Linkers, build systems, shells. Even text editors, if you want to write the code instead of just…
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Gitfs: Version Controlled File System
gitfs went on a trip around the world, and we were there to document it: fro Italy to Sweden, from the UK to Spain, gitfs has been center stage.
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PureOS 10 is Released for all Librem Products
Purism makes premium phones, laptops, mini PCs and servers running free software on PureOS. Purism products respect people's privacy and freedom while protecting their security.
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It's Time for Operating Systems to Rediscover Hardware
A glance at this year's OSDI program shows that Operating Systems are a small niche topic for this conference, not even meriting their own full session. This is unfortunate because good OS design has always been driven by the underlying hardware, and right now that hardware is almost unrecognizable from ten years ago…
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Migrating Millions of Concurrent WebSockets to Envoy
Slack has a global customer base, with millions of simultaneously connected users at peak times. Most of the communication between users involves sending lots of tiny messages to each other. For much of Slack’s history, we’ve used HAProxy as a load balancer for all incoming traffic. Today, we’ll talk about problems we…
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How to Safely Think in Systems
While there are a decent number of folks out there modeling systems, there’s a much larger group of folks who think of themselves as systems thinkers but utilize techniques like modeling rather casually (a polite way of saying that they don’t use them). Even with modeling tools available, I’ve often taken the shortcut…
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32 Bit Real Estate
Apps on Fly.io all get their own routable IPv4 addresses. Here's what that costs us.
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Linux x86 program start up – How the heck do we get to main()? (2011)
This is for people who want to understand how programs get loaded under linux. In particular it talks about dynamically loaded x86 ELF files. The information you learn will let you understand how to debug problems that occur in your program before main starts up. Everything I tell you is true, but some things will be…
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Reducing Rust Incremental Compilation Times on macOS
How I reduced Rust incremental debug build times on macOS from 14 seconds down to 4 seconds.
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New HTTP standards for caching on the modern web
If you run any large public-facing website or web application on the modern web, caching your static content in a CDN or other caching service is super...
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Finding Windows HANDLE leaks, in Chromium and others
Three years ago I found a 32 GB memory leak caused by CcmExec.exe failing to close process handles. That bug is fixed, but ever since then I have had the handles column in Windows Task Manager ena…
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Intel C/C++ compilers complete adoption of LLVM
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