[LyX/master] Defer construction of temporary cursor.

[Scott Kostyshak]

On Tue, Apr 16, 2024 at 04:18:33PM GMT, Richard Kimberly Heck wrote:
> commit 4e8aa89eb96cd73e6630deea6fd6b9d3039aab6c
> Author: Richard Kimberly Heck <rikiheck at lyx.org>
> Date:   Tue Apr 16 12:15:50 2024 -0400
> 
>     Defer construction of temporary cursor.
>     
>     We were doing this on every mouse movement. I.e., for every single
>     pixel the mouse traverses. It can be expensive if there are a lot
>     of math insets.
> ---

Nice! I'm curious, how did you come across this? Were you profiling or
just happened to be looking at that code?

Scott
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