3001
Improving the fast inverse square root (2010)
Remember that famous hack for approximating y = x −1/2 from Quake III? It goes like this:
New
The latest blog posts to take off on Hacker News. 4,389 posts.
3002
An extensive ZFS setup on MacOS
DISCLAIMER: If you are in no way familiar or comfortable with the Terminal, this is not for you.
3003
Walkthrough for Systemd Portable Services
Posts and writings by Lennart Poettering
3004
Testing Memory Allocators: ptmalloc2 vs. tcmalloc vs. hoard vs. jemalloc
Quote: if you DO want to get performance from changing mallocs, make sure to test them with your own app Another Quote: in our humble opinion, overall winner...
3005
Fixing bufferbloat on your home network with OpenBSD 6.2 or newer
My home network (which is also my work network) is a standard-issue Comcast cable hookup. In spite of a tolerable 120 megabits down, my experience of daily Internet use is regularly frustrating. Video streams and video chats drop in quality...
3006
Rules of optimization
Rules of optimization: 1) Design for performance from day 1 2) Profile often 3) Be vigilant on performance regressions 4) Understand the data 5) Understand the HW 6) Help the compiler 7) Verify your assumptions Performance is everyone's responsibility https://t.co/CwwJffnHGz
3007
Pipelines – a guided tour of the new IO API in .NET
Pipelines - a guided tour of the new IO API in .NET, part 1 (part 2 here) About two years ago I blogged about an upcoming experimental IO ...
3008
3009
Making a low level Linux debugger, part 2: C
Last time , we started making a debugger and live editor for (re)creating assembly and C programs.
3010
Anatomy of a DNS Lookup – Part II
and determined that most programs reference /etc/resolv.conf along the way to figuring out which DNS server to look up.
3011
How modern Linux systems boot
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…
3012
X86 assembly doesn’t have to be scary
Assembly programming can be intimidating for people who have never looked into it any deeper than a glance, but giving that it underpins how the computers we use work it can be helpful having context in regards to what is actually being run by the CPU.
3013
GCC 8 Link Time and Interprocedural Optimization
GCC 8.1 was released and Linux distros are starting to pick it up. This week hit the openSUSE Thumbleweed update with full rebuild (thanks t...
3014
Why Skylake CPUs Are Sometimes 50% Slower
I got a call that on newer hardware some performance regression tests have become slower. Not a big deal. Usually it is a bad configuration somewhere in Windows or some BIOS settings were set to no…
3015
Floating-Point Determinism (2013)
Is IEEE floating-point math deterministic? Will you always get the same results from the same inputs? The answer is an unequivocal “yes”. Unfortunately the answer is also an unequivocal “no”. I’m a…
3016
3017
Microsoft’s failed attempt on Debian packaging
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.
3018
3019
JVM Internals (2013)
Explains the internal architecture of the Java Virtual Machine (JVM) in simple terms using showing key components and how memory is updated during execution.
3020
Linus Torvalds on aliasing
See also Dennis Ritchie on aliasing, PLOS article , pointer alias in C and remarks on the purpose of C.
3021
ServiceFabric: a distributed platform for building microservices in the cloud
ServiceFabric: a distributed platform for building microservices in the cloud Kakivaya et al., EuroSys’18 (If you don’t have ACM Digital Library access, the paper can be accessed either by fo…
3022
3023
Depressing and faintly terrifying days for the C standard [pdf]
Chris Lattner, the architect of the Clang/LLVM C compiler explained the effects of the C standard’s “undefined behavior”(UB):
3024
Lobotomizing Gnome
I have pretty basic needs from my desktop. I do 99% of my work using just three programs: a terminal emulator, Emacs, and Firefox. I don't want a lot of bells and whistles in my desktop, and I really just want it to get out of the way so I can do my work.
3025
UTC Is Enough for Everyone, Right?
Programming with dates, times, and timezones is hard. But here's some help.
3026
Parallel Index Scans in PostgreSQL
There is a lot to say about parallelism in PostgreSQL. We have come a long way since I wrote my first post on this topic ( Parallel Sequen...
3027
Apps for which macOS applies compatibillity fixes
What do Photoshop, Matlab, Panic Transmit, and Eclipse have in common? They are among the 299 apps for which macOS applies compatibillity fixes.
3028
Tearing apart printf()
How does printf work behind the scenes
3029
3030
Semantic Compression
An introduction to the idea that code should be approached with a mindset towards compressing it semantically, rather than orienting it around objects.