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Optimising for Concurrency: Comparing the BEAM and JVM virtual machines
Explore the internals of the BEAM VM in comparison to the JVM, highlighting the significance of understanding these components.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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Fedora 30
It seems like it was just six months ago that we announced Fedora 29, and here we are again. Today, we announce our next operating system release. Even though it went so quickly, a lot has happened in the last half year, and you’ll see the results in Fedora 30. If you’re impatient, go to […]
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SQLite improves performance with memory-mapped I/O
A complete list of SQLite releases in a single page and a chronology are both also available. A detailed history of every check-in is available at SQLite version control site .
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Rustgo: Calling Rust from Go with near-zero overhead (2017)
Go has good support for calling into assembly, and a lot of the fast cryptographic code in the stdlib is carefully optimized assembly, bringing speedups of over 20 times.
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An adventure in trying to optimize math.Atan2 with Go assembly
This is a recount of an adventure where I experimented with some Go assembly coding in trying to optimize the math.Atan2 function.
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FoundationDB 6.0 released, featuring multi-region support
FoundationDB 6.0.15, our first major release since open sourcing FoundationDB in April, is now officially available!
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Designing a Lock-free, Wait-free Hash Map
Wait-free algorithms attract vast interest and are an area of intense research, the motivation being that true lock-free algorithms and data structures provide great …
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Improved vacuum in PostgreSQL 13
Vacuum is one of the sub-systems in PostgreSQL which gets improved with each release. I have checked past five releases and each has qu...
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The July Galileo Outage: What happened and why
By bert hubert / bert@hubertnet.nl This post is an excerpt of a far longer post on Galileo, its structures and the cause of the outage. Here we’ll only focus on the outage - the potential underlying reasons behind it are described in the full article. Since the week-long outage in July I’ve been fascinated by Galileo…
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Lost Generation: The Relay Computers
Our previous installment described the rise of automatic telephone switches, and of the complex relay circuits to control them. Now we shall see how scientists and engineers developed such relay c…
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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...
3134
I wrote a display server, a desktop environment, and a debugging/reversing tool
This post is to consolidate some information about the project and sub-projects in an attempt to disseminate what I have been spending way too much time on. Arcan – When a Game Engine meets a…
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The Intel 8088 processor's instruction prefetch circuitry: a look inside
In 1979, Intel introduced the 8088 microprocessor, a variant of the 16-bit 8086 processor. IBM's decision to use the 8088 processor in the I...
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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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Running FreeBSD on OS X using xhyve, a port of bhyve
xhyve is port of bhyve to OS X. It is built on top of Hypervisor.framework in OS X 10.10 Yosemite and higher, runs entirely in userspace, and has no other dependencies.
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Io_uring By Example: cat, cp and a web server with io_uring
io_uring is a clever new, high-performance interface for asynchronous I/O for Linux without the drawbacks of the aio set of APIs. In this 3-part article series, we look at how to use io_uring to ge…
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An x86 Assembler in 256 LOC (2017)
For the first “real” post in this blog, we’ll build an x86 assembler in less than 256 lines of C code. Obviously, it won’t implement every x86 instruction, but it will implement a surprisingly useful subset: data movement, control flow, integer arithmetic, bitwise operations, and function calls. We won’t be able to…
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How to scale your model: A systems view of LLMs on TPUs
Training LLMs often feels like alchemy, but understanding and optimizing the performance of your models doesn't have to. This book aims to demystify the science of scaling language models: how TPUs (and GPUs) work and how they communicate with each other, how LLMs run on real hardware, and how to parallelize your…
3142
PostgreSQL 9.0 - Hot Standby, Streaming Replication
The BIG feature. The feature that made PostgreSQL leap from 8.4 to 9.0. Patch was written by Fujii Masao, and committed by Heikki Linnakangas on 15th of January 2010:
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Why don't we have Wayland on Raspberry Pi yet? (2018)
I have long wanted to create my own desktop operating system targeting the Raspberry Pi. I believe we should have a hackable desktop environment that is both powerful and lightweight, similar to BeOS and the Amiga. To build this desktop we really need full control over how apps draw to the screen, but still have…
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A new speed milestone for Chrome
Everyday, billions of people around the world turn to Chrome to get things done quickly on their devices, whether shopping for a new pair o...
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Context Control in Go
Best practices for handling context plumbing in Go
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POSIX close(2) is broken
There's just one small problem: The way POSIX has defined close(2) is completely and utterly broken.
3147
RISC in 2022
You are seeing this because the administrator of this website has set up Anubis to protect the server against the scourge of AI companies aggressively scraping websites . This can and does cause downtime for the websites, which makes their resources inaccessible for everyone.
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Benchmarking Postgres 17 vs. 18
Postgres 18 brings a significant improvement to read performance via async I/O and I/O worker threads. Here we compare its performance to Postgres 17.
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