Re: jit-lock-antiblink-grace

[Eli Zaretskii]

> From: João Távora <address@hidden>
> Date: Tue, 15 Oct 2019 00:29:51 +0100
> Cc: emacs-devel <address@hidden>, Stefan Monnier <address@hidden>
> 
> So I tried this with and without the hook. I removed it (forcibly) with
> 
>  (remove-hook 'post-command-hook
>                'jit-lock--antiblink-post-command t)
> and re-added it with
> 
>  (add-hook 'post-command-hook
>            'jit-lock--antiblink-post-command nil t)
> 
> before beginning the test.
> 
> I confirmed that without the hook the feature is crippled and fails, and
> with the hook it works fine.  This was easier then launching separate
> emacsen with jit-lock-antiblink-grace customized differently.
> 
> 60 second-long C-n in src/xdisp.c,
>   without antiblink: line 706, avg load 4%
>   with antiblink: line 717, avg load 4%
> 30 second-long C-n in lisp/minibuffer.el,
>   with antiblink: line 366, avg load 4%
>   without antiblink: line 361, avg load 4%
> 
> Time to end of buffer with C-v in lisp/minibuffer.el:
>   with antiblink: 10 seconds, avg load 6%
>   without antiblink: 10 seconds, avg load 6%
> 
> Time to end of buffer with C-v in src/xdisp.c:
>   without antiblink: 90 seconds, avg load 8%
>   with antiblink: 91 seconds, avg load 8%

This is encouraging, but please try C-n near the end of xdisp.c, so
that it includes syms_of_xdisp.  The first 350 lines of xdisp.c is one
large comment, and there's a very small number of strings after that.

Thanks.