Sesse__

3 ms·

31.
by Sesse__ 3mo ago
> There's no way around it: a non-IPng-having node will have to go through a translation box of some kind. Yes. Note that it doesn't need to be someone else's relay; anyone with IPv4 connectivity could easily route 2002::&
32.
by Sesse__ 3mo ago
> Actually, we tried that I'm always fascinated by how many people think IPv6 adoption would have gone lightning-fast if we just used This One Weird Trick, where said trick has actually been tried and didn't help. They usually
33.
by Sesse__ 3mo ago
> The current design was implementable by zillions of cheap humans running cheap hardware. Yes and no. The current internet arguably does not work without a browser and a TLS stack anyway, neither of which is easily implementable (e.g. n
34.
by Sesse__ 3mo ago
I was at a talk where he brought up exactly this (I also once did a talk alongside him, but that's a different story). He said there would be two changes: 1. It would have 128-bit addresses. 2. It would have end-to-end encryption (or w
35.
by Sesse__ 3mo ago
So, in your example, each request needs 0.1 core-seconds of PoW. Is that right? Or, since you're saying 10000 hashes across the entire machine and 1000 needed, then on a typical 96-core server you need 9.6 core-seconds of PoW? The form
36.
by Sesse__ 3mo ago
I don't have a book, but my best recommendation would be: Learn how to measure. Whatever language you are using should have a profiler. Learn how to use it and look at how your code holds up. Look for surprises; those are optimization
37.
by Sesse__ 3mo ago
This is called “installing a cryptominer on your web page” and is generally considered illegitimate.
38.
by Sesse__ 3mo ago
That's a completely different question, your claim was about parallelism.
39.
by Sesse__ 3mo ago
Uh, is it resistant to parallelization across multiple sites? Because that's the situation for the scrapers. They're not trying to solve a single PoW challenge across many cores.
40.
by Sesse__ 3mo ago
The sad part is that most employers don't care particularly about performance optimization skills (the economics don't work out, they can often just fix the problem cheaper with more hardware—and even if they can't, they most
41.
by Sesse__ 3mo ago
I once measured a 80s-communally-built event space with a laser meter (it was useful to have digital floor maps for event planning). No measurement was a perfectly round number. No angle was perfectly right. Nothing really lined up. Except…
42.
by Sesse__ 3mo ago
> Also to your point, this is why compliant peak meters use a mandatory 4x upsampling at 48k. This isn't due to latency, it's because the true peak (in the analog waveform) could be between samples.
43.
by Sesse__ 3mo ago
It's behind a flag, if you want to play with it. (The easiest way is usually just to test in Canary.)
44.
by Sesse__ 3mo ago
Did you actually test? I did it and it worked fine (and zooming in confirmed that the RGB bars are nicely preserved). Be sure to put your subsampling at 4:4:4.
45.
by Sesse__ 4mo ago
Why do you think it wouldn't work for a JPEG? I just made one like that, and it worked just fine.
46.
by Sesse__ 4mo ago
Just remove the A record, and nearly all the scrapers disappear. :-) (And then you get one email per month or so that “your host does not resolve in DNS”.)
47.
by Sesse__ 4mo ago
Are you maybe confusing “downstream” with “mainstream”? Being “downstream” of a product means that you are a derivative of that product (your upstream), taking in basically all of their code and adding your own on top.
48.
by Sesse__ 4mo ago
> And while they've recently announced more of this stuff will move to FOSS soon, at the same time their response rate to new bug reports has become worse than ever before, which is deeply worrying. A huge chunk[1] of the MySQL deve
49.
by Sesse__ 4mo ago
MySQL has never been downstream of MariaDB.
50.
by Sesse__ 4mo ago
They are using a fork, although nobody _really_ knows how up-to-date it is.
51.
by Sesse__ 4mo ago
It's the one that nags you to upload all your IMAP passwords and email to Microsoft's cloud.
52.
by Sesse__ 4mo ago
FFmpeg has its own native H.264, HEVC, MP3, Speex and AAC decoders. It's true that they don't have an H.264 or HEVC _encoder_ without calling out to external libraries, but they have a pretty good AAC encoder now, and TBH most use
53.
by Sesse__ 4mo ago
> due to FFmpeg back then lacking any framework for code sharing between components and codecs Funny, I remember this being completely different; FFmpeg bundled ffserver, which transcoded to a bunch of codecs at the same time (sharing mo
54.
by Sesse__ 4mo ago
The idea of having two arguments to fread() is presumably to be able to do something else than all-or-nothing when there's a short read.
55.
by Sesse__ 4mo ago
> ffmpeg and other media frameworks (Windows Media Foundation, Apple’s AVFramwork) only support static pipelines. FFmpeg doesn't do “pipelines”. It's a library, not a framework.
56.
by Sesse__ 4mo ago
It's a signal. It's not a strong signal, and you certainly should not base your entire perf on it, but if the number is unusually high or low, it's a signal that could warrant further investigation. (I once worked with an eng
57.
by Sesse__ 4mo ago
Also, performance is generally pretty low; I've been on projects where we rewrote OpenCV code into more-or-less obvious hand-rolled code and won 5x perf. The abstractions are generally a bit too thick and oriented around single pixels
58.
by Sesse__ 4mo ago
Useful, then, that you can start several vectorized floating-point muls each cycle. (E.g., most modern x86 are 3/0.5 cycles for vmulps. No 20 cycles in sight.)
59.
by Sesse__ 4mo ago
You should multiply by 255.0, optionally add a dither (triangular is okay), and then let the FPU round using its default IEEE 754 round-to-nearest-ties-to-nearest-even mode. None of this crazy 0.5 stuff. :-)
60.
by Sesse__ 5mo ago
Thank you, that is an interesting tidbit!

More ›