> From: Theodor Thornhill <theo@thornhill.no>
> Cc: Eli Zaretskii <eliz@gnu.org>, casouri@gmail.com, Stefan Monnier
> <monnier@iro.umontreal.ca>
> Date: Fri, 04 Nov 2022 21:34:18 +0100
>
>
> Hi Eli and others!
>
> So you challenged me to add some more modes that are supported in CC
> Mode, but not using CC Mode. I finally got some free hours, so here's
> my first follow-up to your "show me the code".
>
> In this repo[0] you will find support for the following modes:
>
> - javascript (this is already in tree-sitter branch - but adding
> without cc mode here)
> - c
> - c++
> - java
> - css
> - JSON
> - TypeScript (left out, as it is in tree-sitter branch already)
Thanks.
> 2. I've focused mostly on indentation and font locking. Indentation is
> using xdisp code style and the gnu style in general.
We should ideally support all the indentation styles supported by CC
Mode.
> When scrolling through xdisp with this variant of C support it is
> noticeably faster on my system. However, I'd like some guidance on how
> to provide some benchmarks to prove my guess.
We usually use something like the below:
(defun scroll-up-benchmark ()
(interactive)
(let ((oldgc gcs-done)
(oldtime (float-time)))
(condition-case nil (while t (scroll-up) (redisplay))
(error (message "GCs: %d Elapsed time: %f seconds"
(- gcs-done oldgc) (- (float-time) oldtime))))))
(defun scroll-up-by-40-benchmark ()
(interactive)
(let ((oldgc gcs-done)
(oldtime (float-time)))
(condition-case nil (while t (scroll-up 40) (redisplay))
(error (message "GCs: %d Elapsed time: %f seconds"
(- gcs-done oldgc) (- (float-time) oldtime))))))
The instructions are: visit xdisp.c and immediately invoke one of
these two functions; then record the time it took to scroll through
the entire file. Compare to CC Mode.
I think we also want to see the above modified to make some change to
the buffer once in a while. For example, once in 100 lines insert a
quote ", or a /* followed by */ after several lines, and see how that
affects the scroll times with both modes.
> Loading said file and immediately going to EOB is instant, but in CC
> Mode takes a little less than a second.
Timing this with benchmark-run and presenting the numbers is also
interesting.
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