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微软修复了一个导致 Firefox 高 CPU 占用的 Windows Defender bug

2023-04-11 18:24:00 by 艾米七号

微软释出了更新，修复了一个导致 Firefox 运行时高 CPU 占用的 Windows Defender bug。该 bug 最早是在五年前报告的，在 Firefox 运行时 Windows 10 内置的安全软件 Windows Defender MsMpEng.exe 的组件 Antimalware Service Executable 会表现出异常行为，导致了高 CPU 占用浏览器运行缓慢。上个月开发者终于找到了问题根源，MsMpEng.exe 在跟踪事件时高频呼叫了操作系统内核的 VirtualProtect 功能。Firefox 在生成大量事件的同时 MsMpEng.exe 执行了大量无用的计算，两者的组合导致了高 CPU 占用，Moziila 和微软合作解决了这个问题，补丁于 4 月 4 日释出，Firefox 的 CPU 占用减少了四分之三。微软同时向 Windows 7 和 Windows 8.1 推送了更新，Firefox 将一直支持这两个操作系统到 2024 年。

https://bugzilla.mozilla.org/show_bug.cgi?id=1441918
https://www.techspot.com/news/98255-five-year-old-windows-defender-bug-killing-firefox.html

#Bug

123 viewsMeow-meow 🍓, 13:31

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Forwarded from ✨【HZR】星咲®ラジオα (老天川)

https://fxtwitter.com/kirishima_eamon/status/1645619435456299010

130 viewsMeow-meow 🍓, 14:32

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Forwarded from Hacker News (yahnc_bot)

Nolibc: A minimal C-library replacement shipped with the kernel https://lwn.net/Articles/920158/

LWN.net

Nolibc: a minimal C-library replacement shipped with the kernel

The kernel project does not host much user-space code in its repository, but there are exceptio [...]

105 viewsMeow-meow 🍓, 21:12

Score: 77+Comments: 15+

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Forwarded from Hacker News (yahnc_bot)

Real-time quantum error correction beyond break-even https://www.nature.com/articles/s41586-023-05782-6

Nature

Real-time quantum error correction beyond break-even

Nature - A study demonstrates the extension of a lifetime of a quantum memory using active quantum error correction and reinforcement learning.

142 viewsMeow-meow 🍓, 21:18

Score: 75+Comments: 8+

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Forwarded from Hacker News (yahnc_bot)

GPT-4 gets a B on my quantum computing final exam https://scottaaronson.blog/?p=7209

Shtetl-Optimized

GPT-4 gets a B on my quantum computing final exam!

Update (April 14): On the suggestion of my TA Justin Yirka, I gave GPT-4 problem 2 from the final exam, along with its own answers and my and Justin’s grading comments, and asked it whether i…

138 viewsMeow-meow 🍓, 21:23

Score: 162+ 🔥Comments: 147+ 🔥

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Forwarded from Hacker News (yahnc_bot)

Virtual Threads Arrive in JDK 21, Ushering a New Era of Concurrency https://www.infoq.com/news/2023/04/virtual-threads-arrives-jdk21/

InfoQ

JEP 444: Virtual Threads Arrive in JDK 21, Ushering a New Era of Concurrency

JEP 444, Virtual Threads, was promoted from Candidate to Proposed to Target status for JDK 21. This feature offers a lightweight threading model to simplify the creation, management, and monitoring of high-throughput concurrent Java applications, allowing…

130 viewsMeow-meow 🍓, 11:56

Score: 157+ 🔥Comments: 291+ 🔥

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Celeste 优化和控制实在是太好了
我苏菲连个围棋都带不动，但是 Celeste 可以 60，拿那个垃圾键盘手感还很好

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196 viewsMeow-meow 🍓, 15:23

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Forwarded from Lancern's Treasure Chest

https://leanpub.com/cppinitbook

有人写了一本书教你如何在 C++ 中初始化一个对象😁

Leanpub

C++ Initialization Story

142 viewsMeow-meow 🍓, 15:27

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Forwarded from Lobste.rs

introducing io_uring support in libuv

Someone openend a PR for io_uring support in libuv, this should help a lot of projects including node to speed up a lot of IO workComments

via vi_mi@users.lobste.rs (vi_mi)

GitHub

linux: introduce io_uring support by bnoordhuis · Pull Request #3952 · libuv/libuv

Add io_uring support for several asynchronous file operations:

read, write
fsync, fdatasync
stat, fstat, lstat

io_uring is used when the kernel is new enough, otherwise libuv simply
falls back to...

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129 viewsMeow-meow 🍓, 06:51

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Forwarded from Hacker News (yahnc_bot)

A Cryptographic Near Miss https://words.filippo.io/dispatches/near-miss/

Filippo Valsorda

A Cryptographic Near Miss

A recent issue in scalar multiplication makes for a good case study of how unsafe interfaces, undocumented assumptions, and time lead to vulnerabilities.

153 viewsMeow-meow 🍓, 07:49