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Faster CRC32 on the Apple M1
CRC32 is a checksum first proposed in 1961, and now used in a wide variety of performance sensitive contexts, from file formats (zip, png, gzip) to filesystems (ext4, btrfs) and protocols (like eth…
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Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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An IRC client in your motherboard
I made a graphical IRC client that runs in UEFI. It’s written in Rust and leverages the GUI toolkit and TrueType renderer that I wrote for axle’s userspace. I was able to develop it thanks to the vmnet network backend that I implemented for QEMU. You can connect to an IRC server, chat and read messages, all from the…
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A Linux sysadmin's introduction to cgroups
So you've heard of this thing called cgroups, and you are interested in finding out more. Perhaps you caught mention of it while listening to a talk abou...
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Maybe people do care about performance and reliability
But they are victims of complex societal factors that are beyond their control
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Zlib-rs is faster than C
We've released version 0.4.2 of zlib-rs , featuring a number of substantial performance improvements. We are now (to our knowledge) the fastest api-compatible zlib implementation for decompression, and beat the competition in the most important compression cases too.
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Gentoo goes Binary
News and information from Gentoo Linux
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Actually Queryable Executables
I was pleasantly surprised and happy to see that my article ‘Your executable is a SQLite database’ resonated with people. It is a format I have been thinking about for a while, and the idea seems to have struck a chord with others.
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Go performance from version 1.2 to 1.18
Shows how much the performance of Go has improved from version 1.2 through to 1.18 -- in its compiler, runtime, and libraries.
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How much faster is Java 17?
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1001
Gentoo Linux 2025 Review
News and information from Gentoo Linux
1002
Making Postgres 300x faster for analytics: batching, operator fusion, and SIMD
Last week we released version 0.2 of pgrust. This release was all about performance. It’s 10x faster than the previous version of pgrust. On OLTP benchmarks, pgrust is 30% faster than Postgres, and on Clickbench, Clickhouse’s benchmark for analytical databases, pgrust is 300x faster than Postgres. It’s even ahead of…
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Linux Pipes Are Slow
Errata: Some significant mistakes were pointed out to me by email by Brendan MacDonell. I have included errata, but the results might not be reliable, so take this with pinch of salt! vmsplice is too fast Some programs use a particular system call “vmsplice” to move data faster through a pipe. Francesco already did a…
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It Can Be Done (2003)
A story about quality from the development of the Multics operating system.
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How PostgreSQL stores rows
poking inside postgres pages
1007
Little Snitch and the deprecation of kernel extensions
You probably came here because your Mac showed a message telling you that software from “Objective Development Software GmbH” (Little Snitch) loaded a system extension that will no longer be compatible with a future version of macOS and that you…
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MySQL is bazillion times faster than MemSQL
I don’t like stupid benchmarks, as they waste my time. I don’t like stupid marketing, as it wastes my time too. Sometimes I succumb to those things, and now in return I want to waste yo…
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How we made editing Wikipedia twice as fast
Over the past six months we deployed a new technology that sped up Wikipedia’s backend application, reducing the median page-saving time for editors from about 7.5 seconds to 2.5 seconds.
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Project Zero: Exploiting the DRAM rowhammer bug to gain kernel privileges
Posted by Mark Seaborn, sandbox builder and breaker, with contributions by Thomas Dullien, revers...
1012
How I tripped over the Debian weak keys vulnerability
Those of you who haven’t been in IT for far, far too long might not know that next month will be the 16th(!) anniversary of the disclosure of what was, at the time, a fairly earth-shattering revelation: that for about 18 months, the Debian OpenSSL package was generating entirely predictable private keys .
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Why does the New menu even exist for creating new empty files?
You have to open the file anyway to make it useful, so why not just open the program directly?
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ThinkPad T480 is my new main laptop which runs FreeBSD
I’ve been using FreeBSD as my primary server OS for quite a long time. But, for unknown reasons, I have never seriously used it on client workstations. Maybe it’s partly because I’m a CUI-oriented person who loves doing things on text terminals as much as possible. Actually, I have been pretty happy with any client OS…
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APFS is not safe to use with names which have Unicode normalisation issues
APFS is not currently safe to use with names which might have Unicode normalisation issues – which means it is only safe with a limited ASCII character set.
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Systems design explains the world: volume 1
"Systems design" is a branch of study that tries to find universal architectural patterns that are valid across disciplines. You might thin...
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