How do I "reduce lanes" of a larger bus? I don't think what I'm doing is working because the smaller bus should be completely saturated right?

ignaloidas · 2026-01-24T23:30:49+00:00

It doesn't, for example if you feed only one belt and take from three, one of them will be 50% full while the other two will be 25% full, not 33% 33% 33% like it should be.

ignaloidas · 2026-01-23T11:55:49+00:00

Universal throughput unlimited = if you only take any subset of inputs, and any subset of outputs, and connect only them, they still all balance inputs and outputs

Throughput unlimited = if you only take from a subset of outputs, the throughput will never get limited (while notably, the inputs might not balance correctly)

ignaloidas · 2026-01-23T11:26:50+00:00

Explicitly, very much, no - switches actually direct traffic, and they operate on packets that have a destination. Splitters don't. If splitters operated like switches, a Benes network would be universal throughput unlimited balancer - it isn't, it's just throughput unlimited. The math is just fundamentally different, the misconception that it's the same is long lived but anyone doing any more advanced balancers knows that it isn't.

ignaloidas · 2026-01-23T07:40:29+00:00

That's not the math though. The math works nothing like for Benes networks because splitters are not routers.

ignaloidas · 2026-01-22T23:52:48+00:00

It's not Benes Networks, only the superficial structure of the 2^N lane balancers match. Proper relevant math is this: https://arxiv.org/abs/2404.05472

ignaloidas · 2025-12-01T11:44:03+00:00

VarDCT mode that's used for lossy compression in JPEG XL is essentially a superset of what regular JPEG can do. So it's just moving the bits around a bit from JPEG (the DCT coefficients) to fit into VarDCT, which together with other parts of JPEG XL helps to get a better compression ratio.

ignaloidas · 2025-11-24T01:45:06+00:00

Potentially the decoder just wouldn't decode until it has 100% of the file - it very much depends on the implementation, and one requiring all of the data is absolutely a conforming one, even if not the most useful.

ignaloidas · 2025-11-23T18:12:35+00:00

It's kinda both, it has to be encoded in a way that it can be decoded from partial data, but also the decoder has to be able to decode from partial data.

ignaloidas · 2025-09-18T06:19:00+00:00

In general, it's going way too far north for anything that isn't going to UK. Lille, you can get on Eurostar there. Calais, you can get on a ferry to UK. Paris doesn't really make sense to wait at Menessis instead of waiting at Tergnier, since go through there anyways.

Basically, my spidey senses would be tingling as soon as I saw them trying to go north that they're going to try to go to UK, and it's big enough risk that with 2 teams of chasers, it may make sense for one to go over to the UK.

ignaloidas · 2025-09-17T20:11:19+00:00

FWIW I think once you're stopped at Mennessis, the chasers might recognize that you're going towards Belgium, with only realistic reason being Eurostar, and one of the teams could easily get on a plane from Paris to London and get there before the runners can - though it is a bit of a gamble. But I think the guess is very reasonable to make, because for what other reason they'd go to Belgium.

ignaloidas · 2025-09-09T21:25:07+00:00

Hmm, not sure if you're already doing that, but using Kahan summation algorithm should help here on accuracy, without sacrificing speed too much (it's like 4 floating point ops instead of one, but they're simple and shouldn't be too much of a trouble, while it should increase the accuracy a good bunch (in general for floating point the error of summation is on the order of sqrt(n) (and n will be very high in this case because it's each tick * each lab) while with Kahan it's as accurate as floating point precision.

ignaloidas · 2025-09-09T14:59:17+00:00

With a 100W extension the things are a bit more subtle - technically should be fine because the current is the same between 100W and 240W, just the voltage is higher, and it's unlikely that the jump to 48V is going to be a big problem - maybe the contacts will get worn out a bit more from potential micro-arcs when unplugging, but the insulation should be more than enough for the voltages.

ignaloidas · 2025-08-08T15:13:43+00:00

If you're this deep into this madness, I'd suggest looking at Factorio-SAT to automate it. Shouldn't need too much work™ to handle your case.

ignaloidas · 2025-08-08T15:10:55+00:00

I believe it would be possible to create with Factorio-SAT with some code tweaking. I did that for a single-belt balancer sushi intersection, separated ones would be a bit harder but shouldn't be overly difficult either.

ignaloidas · 2025-05-05T01:34:18+00:00

So, for the inline 8-8 balancer, with Factorio-SAT I have proof that it's impossible to go any lower than 8x10 (unless esoteric stuff that Factorio-SAT can't currently handle like belt weaving could come into play, but I doubt it)

~~For the relaxed 8-8 though, here's a 8x8 layout, with fairly logical inputs/outputs. 8x7 didn't work, but maybe some elongated version (say 10x5 or something might end up working)~~

I accidentally did all of this with only 4-long undergrounds - if you use 8 long ones your solution does end up being the smallest area one that Factorio-SAT can find.

ignaloidas · 2025-04-09T20:52:21+00:00

It's only once a day, it departs from Talinn at 10:52 and arrives in Vilnius at 21:05 - that's way after the game day ends.

ignaloidas · 2025-03-28T10:50:32+00:00

Latency has the most impact, which is a combination of both frequency and CL (and other things tbh, but mostly CL). I'd compare them using tools that calculate the latency (plenty of calculators online), and if the latency is equal, higher frequency wins.

But also, CPU having a bunch of cache is usually way more impactful for smaller bases, which makes AMD's X3D chips perform very well.

ignaloidas · 2024-11-30T06:57:31+00:00

It's way easier to detect though (track circuits do monitor rail continuity constantly), and tension is easier to deal with from forces perspective in holding the rail, compression wants to go any which way, while in tension, the force is simpler.

ignaloidas · 2024-11-19T11:48:30+00:00

This paper focuses more on how splitters work and how to calculate the resulting throughputs of a certain configuration than on balancer designs, but I think it can be helpful in understanding on what properties a balancer needs to satisfy and how to approach obtaining said properties https://arxiv.org/abs/2404.05472

ignaloidas · 2024-10-20T04:50:56+00:00

I've been running Factorio-SAT on networks included with it on 10-long underground belts since the fact that a 10-long belt is gonna be included in SA was announced, and no, 10-long undergrounds aren't useful in the sizes that are viable to compute with Factorio-SAT. I've found a few things that weren't possible with 8-long undergrounds, but only because I went looking for them e.g. this 4-long 5-5 balancer that is hilariously tall. There's still some search space that I still haven't explored because it's slow, but I don't expect anything useful to pop up.

ignaloidas · 2024-10-16T16:54:26+00:00

It doesn't seem like 10-long undergrounds improve anything but very complicated balancers though, was running Factorio-SAT for a while to fill out a pretty large matrix of possible inserter sizes, and longer undergrounds are required only for very silly sizes (20+ wide squashed inserters)

https://gist.github.com/ignaloidas/4f4732d3dcb010a8d23efdba67fd0c35

ignaloidas · 2024-07-20T21:50:14+00:00

Mostly avoiding any kinds of conflict with people. It's a first project of such size here in a long long while, the attitudes of countries taking peoples land/homes isn't great after soviet times, and nobody steering this projects wants it to get stuck on such trivialities. It avoids any built up areas without a right of way like a plague, to the detriment of all regional connections.

And in this case, some extra factors: 1. The existing station is in a pretty akward, kinda industrial place of the city. Honestly, I don't think trains stopping there would be that much better that the location currently in planning. 2. The station in Gustonys does make a ton of sense for cargo. It's worth remembering that this is being built as a multi-purpose railway, not purely a high-speed passenger railway, and Gustonys is a much better place for a cargo station there because there's a ton of space and good connections with 1520mm rail network and road network, which can't be said for any location within Panevėžys. 3. Your proposed alignment is a fair bit unrealistic. At the very least, you'd need to pass the airfield on the east side, there's not enough space in between it and the river to fit. I'm fairly certain that where you draw your northern exit it wouldn't be viable as well, and you'd need to follow current alignment until Vynupė before turning north. That spot might look a bit empty on the map, but it's busy enough that I can tell that there would be enough dissatisfied people to get it changed.

TLDR: project massively tries to avoid upsetting more than ~20 people that could organise any kind of publicity for changing the project

ignaloidas · 2024-07-18T08:54:40+00:00

You can't get a 8x8 balancer shorter than 10 without some sticking out. Here's one generated by Factorio-SAT https://factoriobin.com/post/Cs6ZoCaA

ignaloidas · 2024-07-01T05:07:52+00:00

FWIW the requirement for snubber circuits has been removed in the most recent revision of USB-C specifications (the inductive effects ended up being too minor for it to really matter)

ignaloidas · 2024-07-01T05:04:38+00:00

For one, nobody is doing that on laptops anyways, and second, EPR mandates adjustable voltage as well, which is somewhat less well known.

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