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danluu's profile
Dan Luu
Dan Luu
Dan Luu
@danluu

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Dan Luu

@danluu

https://patreon.com/danluu 

danluu.com
Joined December 2008

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    1. Dan Luu‏ @danluu 24 Sep 2017
      • Report Tweet

      I've started measuring keypress -> USB latency with a logic analyzer and I'm seeing some measurements in the 20ms to 30ms rangepic.twitter.com/nzUPYMS2rn

      8 replies 1 retweet 37 likes
      Show this thread
    2. Dan Luu‏ @danluu 24 Sep 2017
      • Report Tweet

      Is this plausible? 20ms to 30ms for a keypress seems absurd. OTOH, it's consistent this person's experimenthttp://forums.blurbusters.com/viewtopic.php?f=10&t=1836&sid=080b1b6a517ed1eb6988627c48da080c&start=10 …

      5 replies 0 retweets 9 likes
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    3. Dan Luu‏ @danluu 24 Sep 2017
      • Report Tweet

      They start measuring from internal switch activation and I start when the key moves, so that could explain the 10ms difference.

      4 replies 0 retweets 2 likes
      Show this thread
    4. Dan Luu‏ @danluu 26 Sep 2017
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      Also, does anyone in the NYC area have an "interesting" keyboard I can borrow to test?

      6 replies 1 retweet 2 likes
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    5. Dan Luu‏ @danluu 26 Sep 2017
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      So far, I've tested a couple gaming keyboards and a bunch of other "normal" keyboards. The gaming keyboards haven't been faster.

      7 replies 1 retweet 12 likes
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    6. Kate Murphy‏ @kategeek 2 Oct 2017
      • Report Tweet
      Replying to @danluu

      Have you tested a @keyboardio? There is one @recursecenter.

      1 reply 0 retweets 1 like
    7. keyboardio‏Verified account @keyboardio 2 Oct 2017
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      Replying to @kategeek @danluu @recursecenter

      That latency wouldn't surprise us a whole lot. You ~need at least 5ms for debounce. With housekeeping & overhead, it's easy to get to 20ms.

      1 reply 0 retweets 1 like
    8. keyboardio‏Verified account @keyboardio 2 Oct 2017
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      Replying to @keyboardio @kategeek and

      There's a lot one can do to get well below 20ms, but, in our opinion, not a ton of utility in it for _most_ applications.

      1 reply 0 retweets 1 like
    9. keyboardio‏Verified account @keyboardio 2 Oct 2017
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      Replying to @keyboardio @kategeek and

      If you do play with a Model 01, we have some keys wired to exposed headers inside the enclosure, which should make measurement easier.

      1 reply 0 retweets 1 like
    10. keyboardio‏Verified account @keyboardio 2 Oct 2017
      • Report Tweet
      Replying to @keyboardio @kategeek and

      (We're happy to chat methodology and optimization. Since we don't have 280 yet, email to jesse@keyboard.io may be easiest ;)

      2 replies 0 retweets 2 likes
      Dan Luu‏ @danluu 3 Oct 2017
      • Report Tweet
      Replying to @keyboardio @kategeek @recursecenter

      Let me send you an email when I have something written up! I would love to hear about why I'm wrong about latency mattering :-).

      12:27 PM - 3 Oct 2017
      • 1 Like
      • Arlo James Barnes
      1 reply 0 retweets 1 like
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        1. keyboardio‏Verified account @keyboardio 3 Oct 2017
          • Report Tweet
          Replying to @danluu @kategeek @recursecenter

          Oh, to be clear, we don't think you're _wrong_. Just that below a threshold it's not the most important consideration for many situations.

          1 reply 0 retweets 1 like
        2. Dan Luu‏ @danluu 3 Oct 2017
          • Report Tweet
          Replying to @keyboardio @kategeek @recursecenter

          I agree that it's sometimes (often?) not important, but IMO it matters more often than people think, for reasons too long for twitter 🙂

          1 reply 0 retweets 1 like
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