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Joined 1 year ago
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Cake day: July 24th, 2023

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  • Short answer:
    It gave us compiler explorer, now that it has served its purpose we should stop doing it.

    Long answer:

    Why does hft even exist?

    Hft can exist because most stock markets react to requests as fast as possible and have no noticable fees for certain use cases. This means algorithms that do simple trades like if goggle goes up, buy other tech companies or buy any stock that goes up in europe on the NY market can make small profits if they are faster than everyone else.

    Does it have any value?

    There is one exchange that imposes a delay on every request, effectively inhibiting hft, and its opening actually improved market conditions on all exchanges. This implies it has negative value.
    They also spend millions on hardware, tools and developers to skim small sums of many transaction on the stock market. They are effectively a (very inefficient) tax on the stock market that goes to improving C++ compilers and funding hardware startups.












  • What does defederation imply? Feeds aren’t aggregated, or users are not allowed from the other instance?

    Iirc no activity from one instance is available on the other. No posts in their communities, no posts/comments from their users.

    Also one other major question. I thought lemmy was its own thing, but I guess it’s part of the Fediverse? The Fediverse is just a set of protocols? What is lemmy then?

    The fediverse is a group of social media platforms that use the active pub protocol to pass along user interactions between instances (servers run by different people).

    Lemmy is the reddit of the fediverse, meaning posts in communities and comment in a trees structure.

    Kbin is also the reddit of the fediverse, but with some less features (manly on the moderation side). Because they both use active pub in a reddit style they can easily interoperate.

    Mastodon is the twitter of the fediverse meaning their content (mircoblogging) doesn’t fit the lemmy format but you will only sometimes see some posts like ‘If you can read this I have managed to post from mastodon to lemmy’.