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Re: cc-mode fontification feels random
From: |
Philipp |
Subject: |
Re: cc-mode fontification feels random |
Date: |
Fri, 4 Jun 2021 12:59:45 +0200 |
> Am 04.06.2021 um 12:39 schrieb Eli Zaretskii <eliz@gnu.org>:
>
>> From: João Távora <joaotavora@gmail.com>
>> Cc: Eli Zaretskii <eliz@gnu.org>, Daniel Colascione <dancol@dancol.org>,
>> emacs-devel@gnu.org, ubolonton@gmail.com
>> Date: Fri, 04 Jun 2021 11:08:48 +0100
>>
>> - However, LSP support for fontification seems like it's potentially
>> _less_ efficient than integrating something like tree-sitter as a C
>> module in Emacs. That's because the contents of the buffer and
>> fontification results are continually transmitted back and forth via
>> pipes and JSON format.
>
> The communication of buffer contents to these agents/servers is indeed
> one aspect of the existing packages (those I had time to look at) that
> I personally am unhappy about. Sending the whole buffer or its large
> chunks down the wire as buffer-substring (which requires encoding to
> be correct) is non-scalable, especially if it also requires conversion
> to JSON.
How bad is is actually; are there good numbers on this?
A while ago, I tested this hypothesis by transferring the `buffer-string' of
xdisp.c to a Go module. This goes through a full UTF-8 encoding and makes
three copies (first, to create the string object; then, to copy it to the
module interface; lastly, to make a Go string out of it), and it still only
took a few milliseconds.
Modern CPUs are very good at copying memory, so maybe we're optimizing the
wrong thing here. We definitely should have good benchmarks and profiling data
before deciding what to optimize.
- cc-mode fontification feels random, Daniel Colascione, 2021/06/03
- Re: cc-mode fontification feels random, Eli Zaretskii, 2021/06/04
- Re: cc-mode fontification feels random, Theodor Thornhill, 2021/06/04
- Re: cc-mode fontification feels random, João Távora, 2021/06/04
- Re: cc-mode fontification feels random, Eli Zaretskii, 2021/06/04
- Re: cc-mode fontification feels random,
Philipp <=
- Re: cc-mode fontification feels random, João Távora, 2021/06/04
- Re: cc-mode fontification feels random, Eli Zaretskii, 2021/06/04
- Re: cc-mode fontification feels random, Dmitry Gutov, 2021/06/04
- Re: cc-mode fontification feels random, João Távora, 2021/06/04
- Re: cc-mode fontification feels random, Eli Zaretskii, 2021/06/04
- Re: cc-mode fontification feels random, Eli Zaretskii, 2021/06/04
- Re: cc-mode fontification feels random, Jim Porter, 2021/06/04
- Message not available
- Re: cc-mode fontification feels random, Jim Porter, 2021/06/04
- Re: cc-mode fontification feels random, Eli Zaretskii, 2021/06/04
- Re: cc-mode fontification feels random, Jim Porter, 2021/06/04