Viewing profile — oconnor663

If the problem is that the temperature is too low for the cut, you can just use a higher temp?

Several air launch systems have been tried, with limited but non-zero commercial success. The altitude and speed you get from the plane is very small compared to the total work the…

You can see a similar effect after the explosion at the end of last week's Starship test flight. If you look at where the flames are coming out after the first fireball clears, it …

The vehicle is designed to hold all that fuel, plus whatever payload it carries on top, but it's not designed to have heavy loads attached to it in any other way. Rockets are so in…

https://web.archive.org/web/20120503175355/https://www.nasa.... > The percent propellant has huge implications on the ease of fabrication and robustness in achieving the engineerin…

I don't know anything about this particular launch, but one reason static fires sometimes load more fuel than you'd think is that the hold-down clamps aren't rated for the total th…

Bear in mind that a lot of what's happening to the tiles now is deliberate experiments to see how much weight they can shave off and how many failed tiles they can survive. Given t…

Scott Manley pointed out that it seemed to flip in the wrong direction, with one of the grid fins passing through the plume and inducing a roll. Will be interesting to hear more ab…

Some weird nils don't compare equal to other nils. It's surprisingly easy to construct the weird kind by accident, because the conversion is automatic and invisible.

> The trap is that get_user_by_name ends up loading shared libraries from the new root filesystem to resolve the username. That's kind of horrifying. Is there a reliable list somew…

> async/await introduced entirely new categories of bugs that threads don’t have. O’Connor documents a class of async Rust deadlocks he calls “futurelocks” I didn't coin that term,…

Update: Having watched the whole mission, I've changed my mind about this. It was cool as hell.

I question the choice of the phrase "to the Moon". I get it, it's technically true, but ~100% of normal people hear that and assume it means boots on the ground. Every single time …

It feels to me like Rust has been pretty big on HN ever since the 1.0 release in 2015...

I wouldn't read too much into pre-1.0 versions. Folks take SemVer pretty seriously, and that makes some folks reluctant to declare v1.0 even when a crate has been in use and "mostl…

I had a similar first reaction. It seemed like the AI used some particular buzzwords and forced the initial response to be deferential: - "kindly ask you to reconsider your positio…

On the other hand, it's normal to have heroes, and to need to have them.

Infant mortality was also 1.5x higher in the US than it is today. (Depending on who we mean by "we", this difference can be much larger.) Cystic fibrosis was a death sentence. "Lat…

It's mixed. You get something in the neighborhood of a 3-4x speedup with SHA-NI, but the algorithm is fundamentally serial. Fully parallel algorithms like BLAKE3 and K12, which can…

As far as I know, most CDC schemes requires a single-threaded pass over the whole file to find the chunk boundaries? (You can try to "jump to the middle", but usually there's an up…

It's important to think about the exact procedure you want to use for verifying something. Running with your thought experiment, let's say we publish "the root hash of the whole wo…

Another important parameter with BLAKE3 is "Do you want to use threads?" There's no one-size-fits-all answer to that question, but it's also a parameter that ~no other hash functio…

> Despite benefits, I don't actually think the memory safety really plays a role in the usage rate of parallelism. I can see what you mean with explicit things like thread::spawn, …

> They aren't useful outside of "financial engineering." Without disagreeing with your overall point in 99% of cases, we did actually have a good use for pinning things in the Bitc…