nwallin

18 ms·

181.
by nwallin 3y ago
There are lots of different ways floating point determinism can get lost. The obvious one, as you mentioned, is the 80 bit x87 unit. Lots of 32 bit compilers will compile to doing floating point math on the x87, which is slow, but the same
182.
by nwallin 3y ago
From my understanding, that was OP's point. This project isn't a research project, this project is a one size fits all coding project that purports to solve problems that you need a research project on a single domain in order to
183.
by nwallin 3y ago
> The "Web Mercator is racist" meme is just lazy. It is lazy, but here's a good reason to not use Web Mercator: Unlike regular Mercator, Web Mercator is not conformal. Mercator preserves shape locally, but Web Mercator dis
184.
by nwallin 3y ago
Are you perhaps referring to FTPS, which is FTP with SSL/TLS added? SFTP is very, very different from FTP. Note that SFTP is not a protocol for security transport / authentication. It doesn't do that. It assumes that you&#x
185.
by nwallin 3y ago
It will not use AVX-512 if you have CFLAGS="-march=tigerlake -O2". You will, at the very least, need CFLAGS="-march=tigerlake -O3" to get it to actually use AVX2, and tigerlake's AVX512 implementation is so poor (cl
186.
by nwallin 3y ago
Does any know any more details about this? It's a fun tidbit that gets a link/article on social media every few weeks, but it's never anything more than a tidbit. "The US needed titanium for the SR-71. The only supplie
187.
by nwallin 3y ago
There's a pre-print (ie, not peer reviewed yet) study that, if correct, shows that the best-fit model for Betelgeuse's brightness oscillations over the past 30 years is that Betelgeuse is near the end of its carbon burning cycle.
188.
by nwallin 3y ago
You can only roll the die once. Alice and Bob have a dozen dice. They agree that if they roll a 4, that's the signal for "attack at dawn" and Alice has decided that she wants Bob to attack at dawn. Alice rolls the 12 dice, an
189.
by nwallin 3y ago
Quantum entanglement is like two dice that "agree" with each other to always roll the same number. If Alice and Bob shake their dice in their hands, and roll it on the table, they'll always roll the same number. It does not
190.
by nwallin 3y ago
> I doubt SETI could detect even our own signals, This is true. The signals we communicate with amongst ourselves would be too weak to detect using present equipment at any distance. > when it’s encrypted digital data. I mean it’s jus
191.
by nwallin 3y ago
> [re:matrix multiplication] However, an O(n^3) algorithm will always loose out to an O(n^2*log(n)) algorithm, when the input gets big enough. You have to be very careful about what 'big enough' means. In practice, Strassen mul
192.
by nwallin 3y ago
A dedicated absolute value instruction would save exactly one instruction every time you do absolute value, and both of the instructions for naive absolute value are already pretty fast. Dedicated L/TZCNT instructions save a dozen or s
193.
by nwallin 3y ago
I bought a B&W half duplex Brother printer circa 2011 and have no problems with it. Besides the fact that it was half duplex. I've bought a generic brand toner cartridge twice since then; neither have had problems. Earlier this mon
194.
by nwallin 3y ago
That wouldn't work either. It would heavily favor distros that require major upgrades every six months or whatever over rolling release distros. With Gentoo, the ISO doesn't matter. You can use any bootable linux distro. I general
195.
by nwallin 3y ago
I played a full-ish playthrough (no more quest triggers on the map at completion) at version 1.60 and didn't ever crash once. I got a freeze that I need to tab to a different window and `kill -9` it, which required restarting from the
196.
by nwallin 3y ago
Lomuto partitioning has one major advantage over Hoare: Lomuto can be implemented in such that the inner loop is branchless, while the inner loops in Hoare are branchy and wreck the branch predictor. Lomuto typically fixes the Dutch Nationa
197.
by nwallin 4y ago
This isn't true. Sonic booms are quite loud, even at altitude. The Concorde was audible at its cruising altitude of 60,000ft.
198.
by nwallin 4y ago
We do not have carbon taxes, we have carbon credits. Carbon credits are at best green political theater. At worst they're an effective means for the carbon economy (coal, oil, gas) to deflect efforts to get a carbon tax on the table,
199.
by nwallin 4y ago
The person I'm replying to is arguing that their source code itself is the secrets they're trying to protect.
200.
by nwallin 4y ago
SSH uses ephemeral keys. It's not enough to have the private key and listen to the bytes on the wire, you have to actively MITM the connection. A github employee who has access to the private key and enough network admin privileges to
201.
by nwallin 4y ago
If a good cop doesn't stop the bad cops from doing bad things, they are, by definition, a bad cop. > How many times have you ratted someone out in an environment with oversized peer pressure? Why has this culture of oversized peer p
202.
by nwallin 4y ago
Databases used to very much prefer records with fixed sizes. (they still do, but they used to, too) And storage was very, very expensive so these fixed sizes were often the smallest they could conceivably get away with. So there'd be a
203.
by nwallin 4y ago
The Wii's GPU did indeed have a fixed function pipeline, but that fixed function pipeline did support normal mapping. ("dot3 bump mapping" as was the style at the time.) However, the Wii's GPU only had 1MB of texture cac
204.
by nwallin 4y ago
That's not the Linux distribution, it's the source code. Straight from Google. https://commondatastorage.googleapis.com/chromium-browser-of... The compiled binary is much smaller: ~ $ du -h /usr/l
205.
by nwallin 4y ago
> what the hell exactly goes into the Chromium's PDB file that it barely fits on a DVD-ROM? Debug symbols in general tend to be very big. You need to be able to map each instruction in the binary to a line of code. You can expect a
206.
by nwallin 4y ago
It won't change anything about the population sim, just traffic. There exist other mods that change the population sim; I'm not familiar with them. C:S mods ... well there's a ton of them. It's a pretty deep rabbit hole.
207.
by nwallin 4y ago
> The issue being that the traffic and population simulation engine in CS isnt very good. IMHO C:S is only playable if you use the TM:PE mod. (Traffic Manager:Presidential Edition) It gives you the tools to completely solve the traffic p
208.
by nwallin 4y ago
Endianness isn't relevant to any of the stuff discussed in the article. It is equally applicable to both big endian and little endian architectures.
209.
by nwallin 4y ago
> You wouldn't cheat at tic tac toe despite the inherently low stakes of the game so it doesn't seem any different in any other video game. It takes a minimal amount of study, training, effort to be a perfect tic tac toe player
210.
by nwallin 4y ago
If the point is just to muddy the waters, you don't need a story that's airtight, it just needs to be convincing enough to spark peoples' biases. If it's a crank, well, it's a crank. When I was in the Air Force, and

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