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Keeping a Postgres Queue Healthy
Dead tuples from high-churn job queues can silently degrade your Postgres database when vacuum falls behind—especially alongside competing workloads. Traffic Control keeps cleanup on track.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 2,560 posts.
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Jepsen: MariaDB Galera Cluster 12.1.2
MariaDB is a popular open source SQL database which began as a fork of MySQL . MariaDB Galera Cluster is an active-active replication system for MariaDB which allows reads and writes on every node. In 2015 this author analyzed MariaDB with Galera Cluster and found that although Galera claimed to offer Snapshot…
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High-performance computing, with much less code
The “Exo 2” language allows programmers to write “schedules” that explicitly control how the compiler generates code. This allows performance engineers to transform simple programs into complex programs that do the same thing as the specification, but faster.
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Improving Performance in Firefox and Across the Web with Speedometer 3
Today’s Speedometer release is more open and challenging than before and is the best tool for driving browser performance improvements.
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How Turborepo is porting from Go to Rust
Our strategy for making updates and maintaining stability while we migrate languages.
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Gap between asm.js and native gets narrower with float32 optimizations
asm.js is a simple subset of JavaScript that is very easy to optimize, suitable for use as a compiler target from languages like C and C++. Earlier this year Firefox ...
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Extending the context length to 1M tokens
API Documentation (Chinese) HuggingFace Demo ModelScope Demo Introduction After the release of Qwen2.5, we heard the community’s demand for processing longer contexts. In recent months, we have made many optimizations for the model capabilities and inference performance of extremely long context. Today, we are proud…
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A rant about some of the nice things in the NT kernel
A blog titled Shipping Seven has gotten a lot of traffic recently for their article about Windows 7 and the MinWin kernel – namely, how they’re actually one and the same. The argument o…
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We reduced 502 errors by caring about PID 1 in Kubernetes
For every deploy, scale down event, or pod termination, users of GitLab's Pages service were experiencing 502 errors. This explains how we found the root cause and rolled out a fix for it.
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Playing with a Raspberry Pi 4 64-bit
Lightweight virtualization is a natural fit for low power devices and, so, seeing that the extremely popular Raspberry Pi line got an upgrade, we were very keen on trying the newly released Raspberry Pi 4 model B. Getting the board up and running with a 64bit kernel (and a 64bit userland) proved to be kind of a…
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Real-time Ubuntu is now generally available
Real-time Ubuntu brings end-to-end security and reliability to the time-bound workloads of modern enterprises. With support for real-time compute, Canonical furthers its commitment to providing a best-in-class experience for open-source software consumption. 14 February 2023, London: Canonical today announced the…
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Building blocks of Amazon ECS
So, what’s Amazon Elastic Container Service (ECS)? ECS is a managed service for running containers on AWS, designed to make it easy to run applications in the cloud without worrying about configuring the environment for your code to run in. Using ECS, you can easily deploy containers to host a simple website or run…
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Inference Optimization for MiMo v2.5: Pushing Hybrid SWA Efficiency to the Limit
An end-to-end engineering practice for the MiMo-V2.5 series inference system, covering KVCache management, tiered caching, SWA-aware prefix cache trees, scheduling, Prefill/Decode pipelines, and multimodal optimizations.
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Android emulator abused to introduce malware onto PCs
Attackers have compromised the software distribution system of BigNox, developer of a popular Android emulator for PCs and Macs.
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How removing caching improved mobile performance by 25%
and how we found out.
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The Great DOM Fuzz-Off of 2017
Posted by Ivan Fratric, Project ZeroIntroductionHistorically, DOM engines have been one of the la...
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Software sandboxing: The basics (2025)
Diving into the territory of software sandboxing is diving into mostly uncharted territory. The necessary pieces to implement good sandboxing in your software are scattered all-around and the pioneers haven’t yet gathered enough knowledge into an unified mappa mundi that can guide new sailors through some well…
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Breaking Out of Docker via RunC
Unit 42 brings together world-renowned threat researchers, incident responders and security consultants to create an intelligence-driven, response-ready organization that's passionate about helping you proactively manage cyber risk.
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What happens when a GPU reads memory
Following an LDG.E SASS instruction through the hardware units in an RTX 4090.
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Pruning and Polishing: Keeping OpenBSD Modern
Owing to its historic roots as a derivative of the original Berkeley Systems Distribution (BSD), OpenBSD includes a great deal of old code. Many files bear copyright notices from the year 1980, and in some cases, even older. Although not explicitly stated as a project goal, keeping OpenBSD modern is an important part…
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Building Your Own Efficient uint128 in C++
A practical walk-through of a fixed-width uint128 implementation in modern C++.
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Linker, can you spare a meg? (2021)
Tailscale on iOS runs as a special kind of app, a Network Extension. This lets us run in the background, so we can secure traffic from all of your applications, without them having to change anything. But with this power comes a memory straightjacket. Normal iOS apps can use 5GB or so of memory before iOS kills them…
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Jepsen: YugaByte DB 1.1.9
2019-04-10: The long fork test used in this analysis contained a bug which caused it to (in many cases) fail to identify long fork anomalies. We have re-checked YugaByte DB 1.1.15.0-b16 with a corrected checker, and its long fork tests still pass.