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Re: CC Mode -> Tree sitter challenge

From: Theodor Thornhill
Subject: Re: CC Mode -> Tree sitter challenge
Date: Sat, 05 Nov 2022 14:42:50 +0100

On 5 November 2022 14:31:44 CET, Eli Zaretskii <eliz@gnu.org> wrote:
>> From: Theodor Thornhill <theo@thornhill.no>
>> Cc: emacs-devel@gnu.org, casouri@gmail.com, monnier@iro.umontreal.ca
>> Date: Sat, 05 Nov 2022 14:12:14 +0100
>> So this is the code with results thus far.  It is immediately apparent
>> how much faster this is, IMO.  Every test is run from a fresh `emacs
>> -Q`.  I just eval the files, enable the modes and run the tests.
>> What do you think?
>Looks very promising, thanks.
>> Is there anything clearly wrong with the benchmarks?
>I hope not ;-)
>> In many of the cases tree-sitter is an order of magnitude faster.
>Only in the "go-to-EOB" one, it looks like?  in the others it is 3
>times faster on the average, or what did I miss?

You're right, but I counted number of gcs as well when making that statement. 

>How about benchmarking indentation?  E.g., how long does it take to
>re-indent a large enough function when you add, say, 'if {' at the
>beginning and '}' at the end?

Sure - or even better, how about just knocking every line of xdisp to col 0, 
C-x h C-i?

I'll do both.


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