cperciva

60 ms·

961.
by cperciva 4y ago
Euclid's proof constructs a number which is not a multiple of the purported primes, but it does not construct a new prime.
962.
by cperciva 4y ago
The public key needs to be in the CPU. The private key is only needed when Intel needs to sign new microcode.
963.
by cperciva 4y ago
Pretty sure you mean "contracted" TB, but the typo did provide a humourous mental image.
964.
by cperciva 4y ago
FreeBSD uses Relnotes: yes, or text for the release notes in commit messages to note that the commit has significant user-visible effects.
965.
by cperciva 4y ago
Here's an even more trivial fact: For almost all real numbers, the geometric mean of the first N digits of the decimal expansion, as N goes to infinity, approaches zero. (Really really fast!)
966.
by cperciva 4y ago
poking directly at hardware registers Such luxury! I just spent a couple weeks getting FreeBSD booting in the Firecracker VM and most of my debugging was performed by inserting hlt instructions into the FreeBSD kernel and looking at whet
967.
by cperciva 4y ago
In the context of games: There's a lot of space used for high resolution textures which users normally never see... but they can see if they zoom in, put their nose up to a wall, etc.
968.
by cperciva 4y ago
It isn't... now. On a PDP-11 with 40 kW of RAM, on the other hand...
969.
by cperciva 4y ago
Why can't we just write `#!sh` I never understood. It's because #! is handled by the kernel, but the process environment is not parsed by the kernel.
970.
by cperciva 4y ago
If you have a shell: # command -p getconf PATH If you're writing C code of course you just use the library function.
971.
by cperciva 4y ago
Not in any technical sense, but the latest official statement is "We now believe we've narrowed the cause to a network system failure following a maintenance update in our core network, which caused some of our routers to malfunct
972.
by cperciva 4y ago
And 'jerk' has to be kept below a certain threshold for humans to find movement comfortable. It's not strictly a matter of threshold -- people might tolerate a higher jerk if it's for a much shorter duration, for examp
973.
by cperciva 4y ago
Jounce, also known as snap. Which to people of a certain cultural background explains where the names for the 5th and 6th derivatives come from.
974.
by cperciva 4y ago
Sometimes it's DNS...
975.
by cperciva 4y ago
It's one thing to run the full test suite across all supported architectures. It's quite another to run the full test suite across all supported CPUs . The vast majority of x86-64 CPUs do not trigger this bug.
976.
by cperciva 4y ago
I don't know if it's in the default build script, but it doesn't really matter -- most people install precompiled binaries.
977.
by cperciva 4y ago
How do you know who is a genius when they are finishing their PhD? Everyone finishing a PhD at Oxford/MIT/Stanford/etc has a very impressive resume Impressive resumes, sure. But my experience has been that even when studen
978.
by cperciva 4y ago
Yes, if it's in my (fairly narrow) area of expertise. About 90% of the time when someone approaches me with audit work the answer ends up being "I'm not the right person to hire for this".
979.
by cperciva 4y ago
Previously: https://news.ycombinator.com/item?id=24537865
980.
by cperciva 4y ago
Cruise ships aren't affected by the Jones Act. They're covered by the Passenger Vessel Services Act instead (which is basically the same thing, only for passenger vessels rather than cargo vessels).
981.
by cperciva 4y ago
Nope. Hospitals and doctors are free, but prescriptions aren't.
982.
by cperciva 4y ago
Her short-acting insulin, Lispro, costs $70.22 for 1 vial, which lasts her about 30 days. That's not far off from what I pay in Canada, assuming we're talking a standard 1000 U vial. I thought insulin was typically around 5x th
983.
by cperciva 4y ago
It's best not to allow residential use in an industrial zone, because it tends to promote very low quality housing. Presumably nobody wants to live in "low quality housing", and no developer wants to build housing which t
984.
by cperciva 4y ago
They're probably optimizing for consistent throughout rather than latency. Faster vehicles would reduce latency but increases the risk that a breakdown would knock out some of the capacity. (And with an underground network it's
985.
by cperciva 4y ago
I would have said "... is accelerating satellites' orbital decay".
986.
by cperciva 4y ago
Anyways, I'm just here to say, corporate security teams are definitely not OK with you doing a rogue Tailscale install, and that's as it should be. You might be shocked at how often I get "can you deploy a tarsnap server on
987.
by cperciva 4y ago
That seems like the wrong question. My options were "write my own protocol" or "use openSSL" -- writing my own TLS stack was never on the table.
988.
by cperciva 4y ago
It's possible that I could have taken TLS 1.1 and removed all the broken parts, sure. I mean, that's pretty much what TLS 1.3 is. But frankly I trust my ability -- both now and in 2007 -- to use standard cryptographic algorithms
989.
by cperciva 4y ago
TLS 1.3 is definitely better than previous versions. Note however that it wasn't published until 2018; Tarsnap's transport layer has been in use since 2007, before even TLS 1.2 was published. If I had used TLS at the time, it wo
990.
by cperciva 4y ago
Using TLS makes this particular cryptographer twitch.

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