bug#38727: 27.0.50; The frame refreshes when pressing 'C-h k'

[Alan Third]

On Tue, Dec 24, 2019 at 12:00:01PM +0800, HaiJun Zhang wrote:
> In GNU Emacs 27.0.50 (build 1, x86_64-apple-darwin17.7.0, NS appkit-1561.61 
> Version 10.13.6 (Build 17G10021))
>  of 2019-12-23 built on jundeMac
> Repository revision: 3ee8ee8476fef2a5e8159f7597e36e0953295ce2
> Repository branch: build-emacs-mod
> Windowing system distributor ‘Apple', version 10.3.1561
> System Description: Mac OS X 10.13.6
> 
> There is noticeable refresh of the emacs frame when pressing ‘C-h k’.
> No refresh for ‘C-h f’ and ‘C-h a’.

Hi, I can’t replicate this. I suspect it’s something in your config
slowing redisplay enough for bug#32932 to appear.

Can you try the branch scratch/ns/draw-to-bitmap and see if the same
issue occurs there?

-- 
Alan Third