Re: macOS metal rendering engine in mac port

[Alan Third]

On Sat, May 29, 2021 at 12:21:48PM +0300, Eli Zaretskii wrote:
> > From: Aaron Jensen <aaronjensen@gmail.com>
> > Date: Sat, 29 May 2021 02:06:18 -0700
> > Cc: Alan Third <alan@idiocy.org>, emacs-devel@gnu.org
> > 
> > Oh, and even with my config, with line numbers, in a ruby file, I'm
> > seeing 60-80ms latency with my measuring app.
> 
> Compared to what latency without line numbers?  60-80ms is quite a lot
> for redisplay, but I don't really have a clear picture of how that
> works on NS.

FWIW, on my Mac I put some timings into the display code and from the
moment we receive a keyDown notification to the moment we hand off the
drawn buffer to the system for display takes around 3-6ms, so unless
Aaron's system is very different from mine, most of that time is spent
in places we can't do much about.
-- 
Alan Third