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How CircleCI Processes 4.5M Builds per Month
Discover the tech stack used by CircleCI. Explore 34 tools across 4 categories.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 2,560 posts.
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Let's Build a Modern Hadoop
Not just another Hadoop rant — I promise
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A look at VDO, the new Linux compression layer
Use Red Hat Enterprise Linux 7.5's VDO for storage optimization - save space, boost performance
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Invoke Win32 applications with Bash on Windows
Learn about the considerations and interop commands available when working across Windows and Linux file systems with WSL.
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How we made data aggregation on PostgreSQL better and faster
They’re so fast we can’t catch up! Check out our benchmarks with two datasets to learn how we used continuous aggregates to make queries up to 44,000x faster.
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FreeBSD 14.5-Release
The FreeBSD Release Engineering Team is pleased to announce the availability of FreeBSD 14.5-RELEASE. This is the sixth release of the stable/14 branch.
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Z Garbage Collector: The Next Generation
The Z Garbage Collector (ZGC)—a scalable, low-latency garbage collector providing sub-millisecond max pause times—continues to evolve. This session will review the design goals behind ZGC and provide a look into the impact of the upcoming support for multiple generations. It will also present general guidance on…
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WebOS OSE 2.10
We’re pleased to announce the release of webOS Open Source Edition (OSE) 2.10.0. The highlights of this release are as follows: Storage access framework Enabling cookie encryption of Blink Peripheral Manager service ACG enhancements For more details on this release, see the release notes. Storage Access framework…
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Gnome Wayland porting – the endgame
Its been a while since I mentioned Wayland in this space - of course that doesn't mean that work on GNOME Wayland support has stopped. Quite the opposite, in fact. The GNOME 3.15.4 release that is due this week will close a number of the remaining gaps: libinput 0.8 has been released, with most of...
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Speculative Decoding in vLLM on AMD GPUs
A practical guide to speculative decoding in vLLM on AMD GPUs, covering draft-and-verify mechanics, MTP, EAGLE-3, DFlash, DSpark, configuration, tuning, and ben
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MemoryDB: A fast and durable memory-first cloud database
Amazon MemoryDB for Redis is a database service designed for 11 9s of durability with in-memory performance. In this paper, we describe the architecture of MemoryDB and how we leverage open-source Redis, a popular data structure store, to build an enterprise-grade cloud database. MemoryDB offloads…
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HermiTux: A Binary-Compatible Unikernel
A binary-compatible unikernel
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NT OS Kernel Information Disclosure Vulnerability
Bidding farewell to one of the last kernel address leaks, CVE-2025-53136. Even patches can open new doors for exploitation.
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Hooking Go from Rust
How did we hook Go functions from Rust to work with mirrord? A quick dive into the Go Runtime and switching from the Go stack to the system stack.
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Filtering millions of packets per second on commodity NICs
In a previous post we discussed the performance limitations of the Linux kernel network stack. We detailed the available kernel bypass techniques allowing user space programs to receive packets with high throughput.
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Libreboot 20230319 Released
Libreboot – Libreboot 20230319 released!
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Sharding Pinterest: How we scaled our MySQL fleet
Building the platform where people around the world come to search, save and shop
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The HDFS Juggernaut
There's been much focus on MongoDB, Elastic and Redis in terms of data exposure on the Internet due to their general popularity in the developer community. However, in terms of data volume it turns out that HDFS is the real juggernaut. To give you a better idea here's a quick
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Keeping Time with Amazon Time Sync Service
Today we’re launching Amazon Time Sync Service, a time synchronization service delivered over Network Time Protocol (NTP) which uses a fleet of redundant satellite-connected and atomic clocks in each region to deliver a highly accurate reference clock. This service is provided at no additional charge and is…
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21 years and counting of 'eight fallacies of distributed computing' (2025)
Eight long held and common beliefs about the network have been shown, time after time, to be false. What are they, and what do they mean?
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Broken packets: IP fragmentation is flawed
As opposed to the public telephone network, the internet has a Packet Switched design. But just how big can these packets be?