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From: Orgad Shaneh <orgads AT gmail DOT com>
Date: Fri, 18 Mar 2022 15:04:31 +0200
Message-ID: <CAGHpTBKiEi_XC8oXhYcS=9hPW=9Gd2Ep=aTdLwbxsBp4zDmqqQ@mail.gmail.com>
Subject: Re: Typed characters are mis-ordered when CPU usage is high
To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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On Fri, Mar 18, 2022 at 2:15 PM Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp> wrote:
>
> On Fri, 18 Mar 2022 13:21:00 +0200
> Orgad Shaneh wrote:
> > > Git for Windows
> >
> > Were you able to reproduce?
> >
> > I found an easier way to reproduce, which works almost every time.
> >
> > It still happens only on Git Bash, and not on MSYS2 MINGW64, although
> > I use the same dll in both. I have no idea why there's a difference.
> > :/
> >
> > I run Windows Terminal, but it reproduces also in cmd, as you tried.
> >
> > 1. In Control Panel -> Keyboard, set Repeat delay to shortest and
> > Repeat rate to fastest.
> > 2. In msys2-runtime run git fetch
> > 3. Type git and press and hold q
>
> Thanks. I can reproduce the issue. I think I found the cause.
> The two unexpected things happen.
>
> (1) wVirtualKeyCode and wVirtualScanCode of readback key event may
>     be null'ed even if they are not zero on WriteConsoleInputW().
>     Therefore, memcmp() report the event is not equal.
> (2) WriteConsoleInputW() may not be atomic. The event sequence which
>     is written by WriteConsoleInputW() may be inserted by key input
>     in the middle of the sequence.
>
> A patch for these issues is attached. Could you please test?
>
> --
> Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

Awesome, looks good now. Thank you very much!

Hope this is the last bit :)

- Orgad

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