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andy_matuschak's profile
Andy Matuschak
Andy Matuschak
Andy Matuschak
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@andy_matuschak

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Andy MatuschakVerified account

@andy_matuschak

Wonder, blunder, salve, solve! Working on tools that expand what people can think and do. Past: led R&D @KhanAcademy; helped build iOS @Apple.

San Francisco, CA
andymatuschak.org
Joined November 2007

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    1. Rasmus Andersson‏ @rsms Apr 24
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      As a little side project this week I’ve put together a simple playground for learning about input pointer latency in web browsers and experimenting with the idea of using path prediction, as demonstrated in this video. Play here: https://rsms.me/pointer-latency/ …pic.twitter.com/FblsI4YulR

      16 replies 35 retweets 446 likes
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    2. Rasmus Andersson‏ @rsms Apr 24
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      Responsiveness and interface latency is something I’ve been passionate about for decades. The fact that you’re always working on old input data in a web browser—in any windowed app, really—is unfortunate when you want to create something that feels snappy and responsive.

      3 replies 0 retweets 49 likes
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    3. Rasmus Andersson‏ @rsms Apr 24
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      On pointer events in web browsers, I’ve put together this poster that illustrates what happens in Chromium on macOS: https://www.figma.com/c/file/823955832357164761 …pic.twitter.com/jlDCaeTuzp

      3 replies 7 retweets 85 likes
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    4. Ryhan‏ @ryhanhassan Apr 24
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      Replying to @rsms

      Ryhan Retweeted Andy Matuschak

      Neat! Seeing the prediction visualization reminded me of this drawing tools with predicted pathshttps://twitter.com/andy_matuschak/status/955141122677878784?s=21 …

      Ryhan added,

      Andy MatuschakVerified account @andy_matuschak
      (it's very interesting how the "feel" of this pen with realtime predictions is totally different from this pen with 200ms predictions, which is totally different from this pen with 2500ms predictions… it's so fertile making discrete systems continuous!) https://twitter.com/andy_matuschak/status/948763069689114624 …
      Show this thread
      2 replies 0 retweets 1 like
      Andy Matuschak‏Verified account @andy_matuschak Apr 24
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      Replying to @ryhanhassan @rsms

      Ah, thanks for the shout. You can play here: https://andymatuschak.org/scrying-pen/  Fun memory: in ~2013, when I was at Apple, I made all scroll views predict future touches to get a tighter response. We pulled it before shipping—not a big enough diff. There's an API for this now for drawing.

      11:04 AM - 24 Apr 2020
      • 5 Likes
      • Louis Harboe Andy Ngo Mykola Blyk Rasmus Andersson Ryhan
      1 reply 0 retweets 5 likes
        1. New conversation
        2. Rasmus Andersson‏ @rsms Apr 24
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          Replying to @andy_matuschak @ryhanhassan

          iOS does touch prediction I know. Did the scroll code—which sounds very interesting—get ditched because of that perhaps?

          1 reply 0 retweets 0 likes
        3. Andy Matuschak‏Verified account @andy_matuschak Apr 24
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          Replying to @rsms @ryhanhassan

          No, the system-level temporal touch prediction is something you have to op into with a special API, or at least it was as of a couple years ago. Was added for drawing (i.e. Pencil). The scroll view predictive stuff simply didn't "feel" enough better to justify the complexity.

          1 reply 0 retweets 4 likes
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