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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Casey Muratori‏ @cmuratori Oct 10
      Replying to @TimSweeneyEpic

      The reason is because the only point of proof of work _is_ to keep latency high. You don't actually need it for anything else. The entire point of PoW is just to have there be a single value you can check before validating a transaction block. It's DDoS protection.

      7 replies 2 retweets 48 likes
    2. Casey Muratori‏ @cmuratori Oct 10
      Replying to @cmuratori @TimSweeneyEpic

      This is (but one) of the reasons "blockchain" is not a particularly good idea. People want low-latency, high-volume transactions, but the designs of these systems preclude that possibility entirely. They are, by design, not able to do the thing you wanted them to do.

      5 replies 0 retweets 34 likes
    3. Max‏ @moistgibs Oct 10
      Replying to @cmuratori @TimSweeneyEpic

      Throughput isn't a problem if block size scales (on BTC, notably, it does not). Latency remains, but various chains have addressed it with e.g. opt-in 0-confirmation transactions, where the payee accepts the double-spend risk.

      1 reply 0 retweets 0 likes
    4. Casey Muratori‏ @cmuratori Oct 10
      Replying to @moistgibs @TimSweeneyEpic

      It's unclear what "block size scales" means here, though. Block sizes can't be scaled arbitrarily because they are universally replicated state. The VISA volume would crush most nodes on the BitCoin network, etc., just for storage.

      2 replies 0 retweets 2 likes
    5. Max‏ @moistgibs Oct 10
      Replying to @cmuratori @TimSweeneyEpic

      For example, BTC blocks are limited to 1MB. BCH 32MB. BSV blocks are variable and uncapped, and blocks >1GB have been mined. Throughput scales proportionally. This has storage implications for nodes of course - large block advocates contend that storage is cheap.

      1 reply 0 retweets 0 likes
    6. Casey Muratori‏ @cmuratori Oct 10
      Replying to @moistgibs @TimSweeneyEpic

      That is kind of obviously false, as is well-covered in the original Lightning Network paper.pic.twitter.com/LYRhULDJqS

      3 replies 0 retweets 2 likes
    7. Tim Sweeney‏ @TimSweeneyEpic Oct 10
      Replying to @cmuratori @moistgibs

      Those are rookie numbers. We’ve got to pump those numbers up. 15M PCU * 30Hz = at least 450M transactions per second required to support a live Fortnite event.

      2 replies 0 retweets 14 likes
    8. Chris Eberly‏ @chriseberly Oct 10
      Replying to @TimSweeneyEpic @cmuratori @moistgibs

      is this true? The 450m / sec number? Not because I give a shit about the original topic but because that’s an interesting number to benchmark against

      1 reply 0 retweets 0 likes
    9. Tim Sweeney‏ @TimSweeneyEpic Oct 10
      Replying to @chriseberly @cmuratori @moistgibs

      Well, it doesn’t work that way now - today in that scenario there would be 150,000 servers handling 100 players each at 30Hz without communication among servers, and then databases handling at most several transactions per player per minute for globally persistent data.

      1 reply 0 retweets 2 likes
    10. Tim Sweeney‏ @TimSweeneyEpic Oct 10
      Replying to @TimSweeneyEpic @chriseberly and

      But if we want a single metaverse in a shared world, with an open world programming model that’s not a mess, on the scale of a modern social network, then you need something like 250M PCU * 30 Hz = 7.5G transactions per second.

      2 replies 0 retweets 4 likes
      Casey Muratori‏ @cmuratori Oct 10
      Replying to @TimSweeneyEpic @chriseberly @moistgibs

      I don't know that it'd be that hard to build such a network, but it definitely wouldn't involve a blockchain, since they are very inefficient, and get worse as they go.

      5:21 PM - 10 Oct 2021
      • 7 Likes
      • Radoslaw Jurga Ivan Braidi David Deutsch Chris Eberly Marcelo Serres Erik Robson
      2 replies 0 retweets 7 likes
        1. Chris Eberly‏ @chriseberly Oct 10
          Replying to @cmuratori @TimSweeneyEpic @moistgibs

          ya the number seems pretty realistic. I like having reference points like this for designing things. Good luck with the rest of the thread!

          0 replies 0 retweets 0 likes
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