fdeweerdt

[frevib @hielkedv]

#io_uring vs #epoll: simple echo server. io_uring +99% performance, -45% cpu usage. Wow. @axboe @VincentFree. 🏆io_uring🏆.

Try for yourself:
io_uring: https://t.co/XXmXISgLqX
epoll: https://t.co/iSK68lanfX

[Jens Axboe @axboe]

Added basic link test cases and a cp(2) example using linked read and writes to liburing. Needs a bit of love (short reads, errors), consider it a tech demo.

https://t.co/I31tBWMLdo

[Fastly @fastly]

Learn about QUIC, straight from the experts. Join @mnot, Jana Iyengar, and @kazuho for a lively lunch discussion about QUIC on May 21 in London. RSVP here: https://t.co/xNhtU8RXcS

[fdeweerdt @fdeweerdt]

@josephscott https://t.co/fwhI7xwO70

[apenwarr @apenwarr]

I hereby invent SDD, strace-driven development, where you keep redesigning your program until its strace output as small as possible.

[x0rz @x0rz]

I need this in my life: a terminal user-interface for tshark https://t.co/iDxj1Mz5Kj

[One Devloper Army @OneDevloperArmy]

Six Stages of Debugging

Step 1 : That can’t happen.

Step 2 : That doesn’t happen on my machine.

Step 3 : That shouldn’t happen.

Step 4 : Why does that happen?

Step 5 : Oh, I see.

Step 6 : how did that ever work?

[fdeweerdt @fdeweerdt]

@FiloSottile mprotect(PROT_NONE) would work, it does have the disadvantage of creating a new vma (continuous mappings need to be split if they have different protections)

[fdeweerdt @fdeweerdt]

> we implemented our eBPF-based tracing tool that can sniff Unix domain sockets across an entire Linux host

https://t.co/7LlkePHqAV

[✨ Jean Yang ✨ @jeanqasaur]

These views are based on the strong belief that people avoid strong static typing and structured environments not because they are unenlightened, but because dynamic types and the like are way better for prototyping. (I, personally, love to program in Python like it's OCaml.)

[Yaniv Kaul @YanivKaul]

Very impressive improvements to IOPS and latency reduction coming to @Ceph by the use of the io_uring interface which was added by @axboe to Linux kernel 5.

https://t.co/xwaFTHxuYq

[David Godfather Miller @davem_dokebi]

Facebook PE Summit Seattle keynote slides, you know you want it: https://t.co/wfgt9Gmwjh

[fdeweerdt @fdeweerdt]

> find all sorts of curious
C language features that are rarely seen, like unnamed zero sized bitfields

[Arnaldo Carvalho de Melo @acmel]

pahole 1.13 is out, go check it out: https://t.co/9GNFvAV01C #pahole #bpf #btf #dwarf

[Joseph Scott - https://bsky.app/profile/josephscot @josephscott]

Chrome Delays Requests On Slow Connections, Even With HTTP/2 - https://t.co/IJqkSmfvWk

[fdeweerdt @fdeweerdt]

@pcwalton @axelgneiting > * I deliberately chose not to comment it. You should have at least
> * as much fun trying to understand it, as I had to write it :-).

wat

[fdeweerdt @fdeweerdt]

@Sekurak @robertswiecki h2o has a fuzzer integrated into oss-fuzz https://t.co/Uv1cKXeHE4

[Adrian Colyer @adriancolyer]

One visit to a website, and unbeknownst to you your browser can be enlisted in a botnet and remain under control even when you leave the site... https://t.co/BVR1p9ZDGR

[fdeweerdt @fdeweerdt]

@jedisct1 @bagder It's unclear how the proposed solution (further down): "The simple solution [..] is to introduce a new archive mime-type that can transfer chunks of the website at once, including several HTML pages, images, css" would be simpler than the better framing in HTTP/2

[hanno @hanno]

Maybe this is trivial, but the purpose of DoH/ESNI is largely defeatet if OCSP without stapling is used. (OCSP is plain HTTP and if you look at browser traffic these days it makes up a large amount of the remaining HTTP traffic.)

[fdeweerdt @fdeweerdt]

A nice workaround to deal with the close(listener)/accept() race.

[jkbs @jkbs0]

Ever wondered if you can attach a BPF filter to your TCP listen socket?
https://t.co/5I5yAUOxjY

[apenwarr @apenwarr]

Finally, some friends and I are ready to soft-announce the startup we've been working on: https://t.co/u2CdqSZn2W. We're working on a thesis that most modern tech architecture is "too scalable," and that slows down development of features that actually matter.