pgorczak

9 ms·

31.
by pgorczak 4y ago
Yes ISPs are lobbying hard for a tax like this in Europe (not for fees between businesses, they want the government to collect it for them): https://www.euractiv.com/section/digital/news/commission-to-...
32.
by pgorczak 4y ago
One addition on receiver side amplification: it is done all the time. Each piece of equipment has a noise floor that can be higher than the one in the signal (think weak signals but with a good SNR). A low noise amplifier at the receiver ca
33.
by pgorczak 4y ago
I think GP means it’s “I recur, he/she recurs” rather than “I recurse, he/she recurses”
34.
by pgorczak 4y ago
Oh I didn’t know it was kind of a workaround. I do like the fact that loop is not a function though but an expression like if or case. FWIW I think in Clojure you can use “recur” inside functions too to specifically indicate tail call recur
35.
by pgorczak 4y ago
Clojure’s loop expression hits this spot for me. It sets a recursion point to which you can jump using any logic inside the body you want, as long as it is from tail position. It’s like a while loop turned into an expression. I haven’t enco
36.
by pgorczak 4y ago
An example that really stuck with me is that you can draw an arrow on a blank piece of paper and measure its length and direction without needing to define an x/y coordinate system on the paper. There is something there (the manifold a
37.
by pgorczak 4y ago
Async generators similarly open up different ways to program complex / multi step user interactions. Instead of creating “state machine” objects that mutate on every input, you can have async functions aka coroutines that iterate over
38.
by pgorczak 4y ago
It doesn’t measure packet loss, but since there is one tiny request in flight at a time, it ends up in a single IP packet with packet loss being visible as retransmissions / outliers taking multiples of your average round trip time.
39.
by pgorczak 4y ago
Finding the right abstraction isn’t easy in a network stack. TCP’s is less useful for application logic but it reflects the way the protocol works internally. Bunch of Bytes goes in on one side, Bytes stream out on the other side in chunks
40.
by pgorczak 4y ago
Not trying to argue for the feasibility of space based solar power, but the inverse square law applies in the far field i.e. when the emitter can be approximated as a point source. Depending on the wavelength and the antenna size this is no
41.
by pgorczak 4y ago
The main issue in the article are calls to getaddrinfo() on every send which create a delay, which is not only DNS related. The function does DNS lookups but also translates IP address strings to address data that can be used by the kernel
42.
by pgorczak 4y ago
TCP can survive those interruptions on its own, unless the application sets short timeouts or the IP address changes. MPTCP keeps working when either side of the connection changes addresses.
43.
by pgorczak 4y ago
While a TCP socket needs to be created with specific flags to enable multipath, there is a tool that wraps existing applications and “upgrades” the socket calls on the fly: https://manpages.ubuntu.com/manpages/jammy&#x2
44.
by pgorczak 4y ago
And it’s not only the city-city times being better. I’d happily spend 1-2 hours more on a train ride because I’ll have a more comfortable seat and I’ll be able to read/work/sleep/… more or less uninterrupted the whole time. E
45.
by pgorczak 4y ago
It could also be a very real consequence of feeling that you can’t or shouldn’t change the state and are therefore not responsible for it. The article doesn’t mention consumerism as a cause but I feel like it plays a role when people are mo
46.
by pgorczak 4y ago
I checked the German rates recently and I wish that were still true. The ticket for going between Dusseldorf and Cologne train stations with intercity or regional trains is 175 GBP (146 if you book for the whole year). The one for regional
47.
by pgorczak 4y ago
It’s bad right now. In August only 57% of German long distance trains arrived less than 6 minutes behind schedule. 23% had more than 16 minutes delay. IIRC that’s not even counting canceled stops.
48.
by pgorczak 4y ago
AFAICT it really is different in Germany. The constitutional court can also be called by other courts, by the government or by parliament to check already passed laws.
49.
by pgorczak 4y ago
The process makes sense from a separation of powers perspective. When there’s an especially fine line between what legislative wants and (constitutional) judicative allows, there has to be some rejections. This is probably one of the cases
50.
by pgorczak 4y ago
Maybe you don’t need to completely mitigate those vibrations and they’re just a part of moving through life as a human. A very related image that stuck with me is “run on the engine, not the pistons”.
51.
by pgorczak 4y ago
I guess the second claim is referring to the fact that the square root of 2 is an irrational number, so it can’t be expressed as a ratio of integers anyway.
52.
by pgorczak 4y ago
To add some confusion, the “nth generation” features have been described by the International Telecommunication Union (e.g. IMT-2020 for the 5th gen), while the standards are developed by the 3rd Generation Partnership Project. Previously t
53.
by pgorczak 4y ago
Seconding this, I have lots of Python virtual environments with packages that link to brew libs. It’s a bummer coming back to an env after a while and then realizing auto update has removed linked files due to a minor version bump
54.
by pgorczak 4y ago
… if you’re running a single task at a time. Usually multiple tasks need exclusive access to shared resources. And they might be triggered by external inputs which are non-deterministic, making the number of possible system states you need
55.
by pgorczak 4y ago
Neural nets do use extremely long compositions of nonlinear functions whose gradients need to be computed over and over. I guess because chain rule (automatic differentiation) works so well, most of the libraries in use are only “a little”
56.
by pgorczak 4y ago
Yes and even at 2) some subtleties start. You can set up a connection, send a chunk of bytes, and close it. If you reach a clean connection close, you can be sure that all your bytes have reached the other side. As soon as you start sending
57.
by pgorczak 4y ago
I definitely used to think TCP was more “high-level” than it actually is. Yes it does much more than UDP but still, its job is to get a sequence of bytes from A to B. You can tune it for higher throughput or more sensitive flow control but
58.
by pgorczak 4y ago
They’re a bit of a feature of the connection-oriented nature of TCP as the other reply mentions. If the server process crashes and restarts for example, the client will be told that its previous connection is not valid anymore. Basically TC
59.
by pgorczak 4y ago
It’s probably something more. A recent article said 40% of Mercedes-Benz’ revenue from autonomous driving options will be going to Nvidia, starting 2024. Source in German: https://archive.ph/Gs9UD
60.
by pgorczak 4y ago
I mean, it’s great if crypto makes more people think about these questions, even if it’s not the answer. OTOH we’re also seeing it mess up problems for which perfectly valid solutions already exist. In Germany a couple “digital government”

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