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When "idle" isn't idle: how a Linux kernel optimization became a QUIC bug
🐧 Quick UDP Internet Connections (QUIC) Bug Fix
QUIC, a transport layer protocol designed to improve the performance of web traffic, was recently found to have a critical bug stemming from a Linux kernel optimization, highlighting the complex interplay between different system components. This issue, known as the "death spiral," could cause significant performance degradation. Cloudflare's response to and resolution of this bug underscores the importance of thorough testing and collaboration across different technology stacks to ensure robust and efficient online services.
2:05 am, May 13, 2026
guid
https://news.ycombinator.com/item?id=48116064
source_url
https://blog.cloudflare.com/quic-death-spiral-fix/
author_name
sbulaev
id: 2745
uid: 72zxf
insdate: 2026-05-13 02:05:08
title: When "idle" isn't idle: how a Linux kernel optimization became a QUIC bug
additional:
QUIC, a transport layer protocol designed to improve the performance of web traffic, was recently found to have a critical bug stemming from a Linux kernel optimization, highlighting the complex interplay between different system components. This issue, known as the "death spiral," could cause significant performance degradation. Cloudflare's response to and resolution of this bug underscores the importance of thorough testing and collaboration across different technology stacks to ensure robust and efficient online services.
category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=48116064
source_url: https://blog.cloudflare.com/quic-death-spiral-fix/
updated:
image:
author_name: sbulaev
author_link:
uid: 72zxf
insdate: 2026-05-13 02:05:08
title: When "idle" isn't idle: how a Linux kernel optimization became a QUIC bug
additional:
🐧 Quick UDP Internet Connections (QUIC) Bug Fix
QUIC, a transport layer protocol designed to improve the performance of web traffic, was recently found to have a critical bug stemming from a Linux kernel optimization, highlighting the complex interplay between different system components. This issue, known as the "death spiral," could cause significant performance degradation. Cloudflare's response to and resolution of this bug underscores the importance of thorough testing and collaboration across different technology stacks to ensure robust and efficient online services.
category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=48116064
source_url: https://blog.cloudflare.com/quic-death-spiral-fix/
updated:
image:
author_name: sbulaev
author_link:
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- Ask HN: Academic study on AI's impact on software development – want to join?
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- Ask HN: How are you all staying sane?
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- Ask HN: How to Be Alone?
- Ask HN: How to be SOC2 Type 2 compliant as a solo-entreprenuer?
- Ask HN: Is "no source code was copied" still a sufficient copyright defense?
- Ask HN: Is GitHub preparing to go behind a login wall?
- Ask HN: Is anyone experimenting with different ways of using LLMs for coding?
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- Ask HN: Is it just me, or is software buggier across the board?
- Ask HN: My ISP is telling my neighbors their slow internet is because of me
- Ask HN: Please restrict new accounts from posting
- Ask HN: Remember Fidonet?
- Ask HN: Share your productive usage of OpenClaw
- Ask HN: So what happened to Facebook "localhost" tracking?
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- Ask HN: Why hasn't there been a real competitor to Ticketmaster yet?
- Ask HN: Why is the HN crowd so anti-AI?
- Ask HN: Will programmers write more efficient code during the memory shortage?
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- Astronomers find the edge of the Milky Way
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- Can't Stop the Signal. Poison It
- Canada is looking to build up to 10 new nuclear reactors over the next 15 years
- Canada plans 'nuclear renaissance' with up to 10 reactors built by 2040
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- Cancel ChatGPT AI boycott surges after OpenAI pentagon military deal
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