61
An eBPF loophole: Using XDP for egress traffic
XDP only works for ingress. We found a loophole that lets it work for egress. Here's how we did the impossible.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 163 posts.
62
Jepsen: TigerBeetle 0.16.11
TigerBeetle is an Online Transactional Processing (OLTP) database built for double-entry accounting with a strong emphasis on safety and speed. It builds on the Viewstamped Replication (VR) consensus protocol to offer Strong Serializable consistency. Unlike general-purpose databases, TigerBeetle stores only accounts…
63
A race condition in Aurora RDS
See how we diagnosed and confirmed an AWS Aurora RDS race condition impacting failovers.
64
Look Ma, No Bubbles: Designing a Low-Latency Megakernel for Llama-1B
Benjamin Spector* , Jordan Juravsky* , Stuart Sul , Owen Dugan , Dylan Lim , Dan Fu , Simran Arora , Chris Ré
65
AI models need a virtual machine
Neural networks are more useful when placed in a suitable, specialized environment.
66
A Higgs-Bugson in the Linux Kernel
We recently ran across a strange higgs-bugson that manifested itself in a critical system that stores and distributes the firm’s trading activity data, calle...
67
Every System is a Log: Avoiding coordination in distributed applications
Distributed coordination makes application complex and brittle. Because all systems eventually build on logs, we can use a shared-log approach to eliminate most coordination. We discuss this conceptually and show how this is practically implemented in the open source project Restate.
68
Extensible WASM Applications with Go
Go 1.24 enhances WebAssembly capabilities with function export and reactor mode
69
Hacking the Postgres wire protocol
Inside PgDog's wire protocol handling: parsing simple and extended messages, using pg_query for AST inspection, and routing queries via the Postgres hash partition function.
70
Making Postgres scale
A war story of manually sharding Postgres across 6 databases under load, and the case for automating the process with a proxy instead of weeks of engineering effort.
71
Corrosion
Corrosion is distributed service discovery based on Rust, SQLite, and CRDTs.
72
ESP32 Undocumented Bluetooth Commands: Clearing the Air
The developer resources in just one place!
73
Optimizing ClickHouse for Intel's ultra-high core count processors
Intel's latest processor generations are pushing the number of cores in a server to unprecedented levels. For analytical databases like ClickHouse, ultra-high core counts represent a huge opportunity and a complex challenge.
74
A sharded DuckDB on 63 nodes runs 1T row aggregation challenge in 5 sec
What happens when you give a distributed SQL engine a trillion-row dataset? GizmoEdge crushed the Coiled challenge with a 1,000-worker cluster on Azure.
75
UA 1093
On Thursday, 16 October, Foreign Object Debris (FOD) struck the windshield of UA1093, a 737 MAX aircraft, at approximately 36,000 ft. WindBorne began investigating…
76
Cross-Platform P2P Wi-Fi: How the EU Killed AWDL
This post investigates how we got from Wi-Fi Direct to AWDL to Wi-Fi Aware, what makes Wi-Fi Aware technically superior, and why this shift unlocks true cross-platform peer-to-peer connectivity for developers.
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Building a Linux Container Runtime from Scratch
We're open sourcing our programmatic low-level container runtime, Styrolite
79
Does showing seconds in the system tray actually use more power?
Welcome to LTT Labs - your go-to destination for all things tech. Explore comprehensive test results, insightful commentary, and the latest analysis in hardware.
80
How We Found 7 TiB of Memory Just Sitting Around
How we saved 7 TiB of memory across our Kubernetes clusters by disabling namespace listwatching in Vector, reducing daemonset overhead and API server load at scale.
81
The state of binary compatibility on Linux and how to address it
Learn why Linux binary compatibility breaks when shipping software and what developers can do to fix real-world build and deployment issues.
82
Oniux: Kernel-level Tor isolation for any Linux app
Introducing oniux: Kernel-level Tor isolation for any Linux app. This torsocks alternative uses namespaces to isolate Linux applications over the Tor network and eliminate data leaks.
83
AdapTive-LeArning Speculator System (ATLAS): Faster LLM inference
LLM inference that gets faster as you use it. Our runtime-learning accelerator adapts continuously to your workload, delivering 500 TPS on DeepSeek-V3.1, a 4x speedup over baseline performance without manual tuning.
84
The hidden complexity of scaling WebSockets
WebSockets are at the very core of Compose. Learn how we scaled them to support 1000s of concurrent users.
85
Immutable Software Deploys Using ZFS Jails on FreeBSD
An article demonstrating immutable software deployments using ZFS snapshots and FreeBSD jails, with Caddy as a health‑checked reverse proxy for zero‑downtime upgrades.
86
Fedora 42 Beta
Discover Fedora 42 Beta: New AI-focused features for modern application development
87
Performance Improvements in .NET 10
Take a tour through hundreds of performance improvements in .NET 10.
88
Is Postgres read heavy or write heavy?
A query to find out if Postgres is read heavy or write heavy and tips for optimizing Postgres for both read and write workloads.
89
How we tracked down a Go 1.24 memory regression
We rolled out Go 1.24 and saw a memory regression. Here’s how we dug into system metrics, uncovered a bug in the runtime allocator, and worked with the Go team to help fix it.
90
Windows BitLocker – Screwed Without a Screwdriver
Breaking up-to-date Windows 11 BitLocker encryption -- on-device but software-only