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Reading privileged memory with a side-channel
Posted by Jann Horn, Project ZeroWe have discovered that CPU data cache timing can be abused to e...
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 187 posts.
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Firefox’s new streaming and tiering compiler
People call WebAssembly a game changer because it makes it possible to run code on the web faster. Some speedups are already present, and some are yet to come. With ...
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Cloud Computing Without Containers
We have a cloud computing platform called Workers. Unlike essentially every other cloud computing platform I know of, it doesn’t use containers or virtual machines. We believe that is the future of Serverless and cloud computing in general, and I’ll try to convince you why.
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How Discord Handles Two and Half Million Concurrent Voice Users Using WebRTC
Discover the latest news and app updates, stories, company insights, and plenty more about Discord, all in one place.
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ReactOS releases 0.4.8 with experimental Vista/7/10 software compatibility
ReactOS is a free, opensource reimplementation of windows
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Every 7.8μs your computer’s memory has a hiccup
I was particularly interested in one of the consequences of how dynamic RAM works. You see, each bit of data is stored by the charge (or lack of it) on a tiny capacitor within the RAM chip. But these capacitors gradually lose their charge over time.
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Successful second round of fusion experiments with Wendelstein 7-X
The experiments conducted from July until November at the Wendelstein 7-X fusion device at the Max Planck Institute for Plasma Physics (IPP) in Greifswald have achieved higher values for the density and the energy content of the plasma and long discharge times of up to 100 seconds – record results for devices of the…
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Continuing frequency deviation in the Continental European Power System
The Continental European (CE) Power System -a large synchronized area stretching from Spain to Türkiye and from Poland to Netherlands; encompassing 25 countries- is experiencing a continuous system frequency deviation from the mean value of 50 Hz, and this since mid of January 2018.
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The Mystery of the Slow Downloads
A few months ago, a complaint started popping up from users downloading or updating our apps: “Geez, your downloads are really slow!”
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Windows Server 2019 Includes OpenSSH
The OpenSSH client and server are now available as a supported Feature-on-Demand in Windows Server 2019 and Windows 10 1809! The Win32 port of OpenSSH was first included in the Windows 10 Fall Creators Update and Windows Server 1709 as a pre-release feature. In the Windows 10 1803 release, OpenSSH was released as a…
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Amazon Aurora Backtrack
We’ve all been there! You need to make a quick, seemingly simple fix to an important production database. You compose the query, give it a once-over, and let it run. Seconds later you realize that you forgot the WHERE clause, dropped the wrong table, or made another serious mistake, and interrupt the query, but the […]
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LoJax: First UEFI rootkit found in the wild, courtesy of the Sednit group
ESET researchers have discovered the first in-the-wild UEFI rootkit. Dubbed LoJax, the research team has shown that the Sednit operators used different components of the LoJax malware to target a few government organizations in the Balkans as well as in Central and Eastern Europe.
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CockroachDB 2.0 Performance Makes Significant Strides
Learn which performance metrics matter, why to demand benchmark TPC-C results under serializable isolation, and how CockroachDB 2.0’s performance compares to 1.1.
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Bing.com now runs on .NET Core
Bing.com is a cloud service that runs on thousands of servers spanning many datacenters across the globe. Bing servers handle thousands of users’ queries every second from consumers around the world doing searches through their browsers, from our partners using the Microsoft Cognitive Services APIs, and from the…
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Java’s new garbage collector promises low pause times on multi-terabyte heaps
Java 11 features a new Garbage Collector, the Z Garbage Collector (ZGC), which is designed for very low pause times on huge multi-terabyte heaps. In this article we'll cover the motivation for a new GC, a technical overview and some of the really exciting possibilities ZGC opens up.
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Firecracker – Lightweight Virtualization for Serverless Computing
One of my favorite Amazon Leadership Principles is Customer Obsession. When we launched AWS Lambda, we focused on giving developers a secure serverless experience so that they could avoid managing infrastructure. In order to attain the desired level of isolation we used dedicated EC2 instances for each customer. This…
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How we scaled Nginx
10 million websites, apps and APIs use Cloudflare to give their users a speed boost. At peak we serve more than 10 million requests a second across our 151 data centers. Over the years we’ve made many modifications to our version of NGINX to handle our growth. This is blog post is about one of them.
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PostgreSQL 11 Partitioning Improvements
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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Understanding L1 Terminal Fault aka Foreshadow: What You Need to Know
L1 Terminal Fault/Foreshadow explained in ~three minutesFor a more detailed technical view of L1 Terminal Fault, please see this deeper dive with Jon Masters.How we got here: a brief history of modern microprocessor cachesModern computer microprocessors are complex machines, filled with many optimizations designed to…
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