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Comment by jacooper | Hacker News Reader

Look like the latency isn't great from the Gif.

This might be why, it's using TCP instead of UDP?

    sudo ufw allow 1701/tcp
    sudo ufw allow 9001/tcp

https://github.com/H-M-H/Weylus#running

I’m guessing because it’s wireless instead of plugged in. I bet a wired USB TCP connection would be much faster.

Also, if you notice, the laptop response is much faster. To me, this suggests that the drawing on the tablet might require a round trip back to the server. If so, it could probably be sped up by drawing locally/async.

First thing I noticed. Modern Pro tablets advertise latency in the 20ms range, this looks like a few hundred ms.

Creator here: The last time I did measurements for the latency of mirroring the screen I got about 60ms (over WIFI). The Gif is from way back before I did any optimizations at all.

Thanks for the reply! Good to hear, thanks!

Thanks for commenting.

Respectful suggestion that you have no obligation to follow up on, but it might be a good idea to replace that gif with a more recent capture, or even to just remove it? I ran into your project a while ago, before it got featured on here, and that specific gif is the sole reason I never looked into it any further; my immediate reaction was just, "oh, never mind, it looks like the latency is too high to be useful."

Seeing your comment here is actually a happy surprise since I remember thinking at the time that it would be a really cool project if only the latency was even just a bit better :)

60ms is still probably too high for most drawing (of course to be fair, WIFI I'm sure is a big part of that), but it's usable enough that I don't think I would have dismissed the project outright if I had known that the gif wasn't representative.

Either way though, cool project, and I appreciate the clarification.

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