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Quantum Up Close: What is a browser engine?
A web browser is a piece of software that loads remote files and displays them locally, allowing for user interaction. Quantum is the code name for an project we’ve undertaken ...
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The latest blog posts to take off on Hacker News. 6,949 posts.
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The Configuration Complexity Clock
When I was a young coder, just starting out in the big scary world of enterprise software, an older, far more experienced chap gave me a ste...
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BBR, the new kid on the TCP block
A look at Google's delay-controlled TCP flow control algorithm, called BBR.
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Zip Files All the Way Down (2010)
A well-known scientist (some say it was Bertrand Russell) once gave a public lecture on astronomy. He described how the earth orbits around the sun and how the sun, in turn, orbits around the center of a vast collection of stars called our galaxy. At the end of the lecture, a little old lady at the back of the room…
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Bringing up 802.11ac on FreeBSD
I've been chipping away at bringing up 802.11ac on FreeBSD. I've been meaning to write this post for a while, but you know, life got in the ...
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I Broke Rust's Package Manager for Windows Users
Last weekend I was playing around with a way to represent null-terminated UTF8 strings in Rust. Rather than just toying with it forever, I decided ...
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Rediscovering the Intel AMT Vulnerability
On May 1, 2017 Intel disclosed the AMT vulnerability (INTEL-SA-00075), but details of that vulnerability were not made public. However, Tenable researchers were able to overcome this challenge and make Tenable the first to deliver Intel AMT vulnerability detection capabilities to customers, just minutes after Intel’s…
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Truly Seamless Reloads with HAProxy
What users often call a “seamless” or “hitless” reload is a configuration update or a service upgrade performed with no impact on user experience.
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Storage engine design
In time-series databases the querying pattern differs from the write pattern. We usually write data in time order by updating many series every second. But querying is a different story. We usually want to read only a handful of series leaving most of the data behind. Here lies the biggest problem, which is we don’t…
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How Many X86-64 Instructions Are There Anyway?
Personal website of Stefan Heule
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Building a QNX 7 Desktop
Describes the process of building a QNX 7 x86_64 machine from (almost) scratch.
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Formal Methods in Practice: Using TLA+ at ESpark
Using TLA+ at eSpark Learning
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A bug in GCC that may cause memory leaks in valid C++ programs
This post is to inform you about a bug in GCC that may cause memory (or other resource) leaks in your valid C++ programs.
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Should I buy ECC memory? (2015)
Jeff Atwood, perhaps the most widely read programming blogger, has a post that makes a case against using ECC memory . My read is that his major points are:
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High-performance .NET by example: Filtering bot traffic
Mistakes and lessons from a real-world feature performance optimizations: from API usage to advanced data structures, from bit hacks to CPU-friendlier code.
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A faster BBC News front page
Web performance is something I care deeply about both as a developer whose work affects millions of people around the world, and as a user who often accesses the web on slow & unreliable connections. I have regularly and loudly complained that...
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Reproducing Go binaries byte by byte
Fully reproducible builds are important because they bridge the gap between auditable open source and convenient binary artifacts. Technologies like TUF and Binary Transparency provide accountability for what binaries are shipped to users, but that’s of limited utility if there is no way (short of reverse engineering)…
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Fewer mallocs in curl
Today I landed yet another small change to libcurl internals that further reduces the number of small mallocs we do. This time the generic linked list functions got converted to become malloc-less (the way linked list functions should behave, really). Instrument mallocs I started out my quest a few weeks ago by…
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Debian port for RISC-V 64-bit
This is a post describing my involvement with the Debian GNU/Linux port for RISC-V (unofficial and not endorsed by Debian at the moment) and announcing the availability of the repository (still very much WIP) with packages built for this architecture. If not interested in the story but you want to check the…
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Raw Linux Threads via System Calls (2015)
Linux has an elegant and beautiful design when it comes to threads: threads are nothing more than processes that share a virtual address space and file descriptor table. Threads spawned by a process are additional child processes of the main “thread’s” parent process. They’re manipulated through the same process…
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Ubuntu on AWS Gets Serious Performance Boost with AWS-Tuned Kernel
Canonical and Amazon Web Services have been working closely together to create the best experience of the world’s most popular cloud OS, on the world’s most popular public cloud. Official Ubuntu guest images have been available on AWS for years, and underlie the majority of workloads on the service—whether you use the…
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Redshift Spectrum – Exabyte-Scale In-Place Queries of S3 Data
Now that we can launch cloud-based compute and storage resources with a couple of clicks, the challenge is to use these resources to go from raw data to actionable results as quickly and efficiently as possible. Amazon Redshift allows AWS customers to build petabyte-scale data warehouses that unify data from a variety…
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File System Improvements to the Windows Subsystem for Linux
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