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How to DOS a developer
So you think your favourite FOSS project is moving too fast? Easy, just DOS the developers. Here's a few tips on how to achieve this: On IR...
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,943 posts.
5102
On the joy of podman and auto-updates (2022)
podman provides an integrated auto-update mechanism, which I recently applied to all of my containers running on feldspaten. The mechanism is nice, but at first appears a bit counter-intuitive. In this post ’m trying to explain how you can use the mechanism and what to watch out for. I’ll start with the trap I think…
5103
4000x Speedup in Reinforcement Learning with Jax
Web publication for "PureJaxRL"
5104
Reducing Tailscale’s binary size on macOS
Tailscale v1.36 for macOS features a significantly reduced binary size (going from 92MB to 56MB). The effort started out with a chance observation about a surprisingly large executable, and ended up involving some creative approaches using dlopen.
5105
IPv4 route lookup on Linux
Linux uses an LPC-trie for looking up routes. It provides good performance with low memory use even with millions of routes.
5106
Optimizing ClickHouse: Tactics that worked for us
At LaunchDarkly, we ingest nearly 100 terabytes of observability data from our customers every month.
5107
Distributed systems for fun and profit
git , Single page HTML , Kindle .mobi , PDF , .epub , HTML for printing , book cover .
5108
Why is my tcp not reliable? (2009)
This post is about an obscure corner of TCP network programming, a corner where almost everybody doesn’t quite get what is going on. I used to think I understood it, but found out last week that I didn’t.
5109
Fast Lossless Color Image Compression
In the research field of compression, the usual goal is to achieve the best possible compression rate. The best known algorithms, however, are very slow, and sometimes impractical for real-world ap…
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Adventures in JIT compilation: Part 1 – an interpreter
This is the first post in a series about JIT compilers. The plan is to take a simple input language and develop some interpreters and JITs for it, in roughtly increasing degree of complexity. It's my hope that by the end of the series readers will have a good understanding of what it takes to develop a JIT compiler…
5112
Optimizing Nginx TLS Time To First Byte
TLS is not slow, it's unoptimized. A hands-on tour of optimizing nginx to deliver one-RTT Time To First Byte (TTFB) with TLS.
5113
Write hybrid CPU/GPU programs in Haskell
What’s better than programming a GPU with a high-level, Haskell-embedded DSL (domain-specific-language)? Well, perhaps writing portab...
5114
RenderingNG: An architecture that makes and keeps Chrome fast for the long term
Our continual investments in the performance of Chrome have led to significant improvements in battery life, memory, and the speed of the we...
5115
Why ZFS is not good at growing and reshaping pools, or shrinking them
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…
5116
A detailed look at the S-300P anti-aircraft missile system
Technical Report APA-TR-2006-1201; Title: Almaz S-300P/PT/PS/PMU/PMU1/PMU2 / Almaz-Antey S-400 Triumf / SA-10/20/21 Grumble/Gargoyle ; Abstract: Introductory technical analysis and development history of the Almaz-Antey S-300P family of Surface to Air Missile systems. Includes diagrams, imagery and variant tables…
5117
File transfers via the parallel port on DOS using LapLink
Fun with LapLink 5 and parallel port file transfers under FreeDOS
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Monzo Stand-In
Our customers reasonably expect to be able to spend on their card, make bank transfers and pay their bills 24 hours a day, 365 days a year. Their lives don’t have downtime for maintenance so nor should we. We dedicate a lot of our engineering effort to minimise the risk of downtime during technical migrations and…
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5122
The compiler flag that time forgot
I’m often surprised how long software can keep trying to use compatibility features ages after their best-by date. Now that GCC 4.8 builds on Tige...
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Let the callers of your API control allocations
This is a post about performance. Most of the time when worrying about the performance of a piece of code the overwhelming advice should be (with apologies to Brendan Gregg) don’t worry about it, yet. However there is one area where I counsel developers to think about the performance implications of a design, and that…
5126
Redundancy vs. dependencies: which is worse? (2008)
I think that all other considerations are of the extrinsic real-world kind – domain modeling, usability, schedules, platforms, etc. I also think that I can show how any "good" programming practice is mainly aimed at minimizing redundancy, dependencies, or both. I even think that you can tell a "good" programmer from a…
5127
A Story Of realloc (And Laziness)
A Story Of realloc (And Laziness) 05 April 2014 A Simple Macro It...
5128
Why Xen Wasn't Hit by RETBleed on Intel CPUs
An article explaining why Xen wasn't affected by the recent RETBleed security issue on Intel CPUs.
5129
OpenBSD 6.2 and CDE
If you've noticed a disruption in the time-space continuum recently, it is likely because I have finally been able to compile and install ...
5130
Serializable, Lockless, Distributed: Isolation in CockroachDB
To protect concurrent transactions from anomalies that can break the consistency of CockroachDB, we require an Isolation guarantee...