Re: Emacs design and architecture. How about copy-on-write?

[Dmitry Gutov]

On 22/09/2023 01:21, Stefan Kangas wrote:
> Dmitry Gutov<dmitry@gutov.dev>  writes:
>
> > - People using LSP likely see better performance because of VC Code
> > being able to parse the server's output in a different thread (or web
> > worker? I haven't seen the exact design). LSP-Mode folks wrote a POC
> > branch of Emacs which parallelizes the JSON parsing as well:
> > https://www.reddit.com/r/emacs/comments/ymrkyn/async_nonblocking_jsonrpc_or_lsp_performance/
> > Some work toward mainlining this feature (perhaps after generalizing)
> > could help. Or maybe the "multiple concurrent interpreters" approach
> > could yield similar gains.
> Could someone please contact them and ask if they plan to upstream it?
I think they're too busy and not motivated enough at the moment: 
https://github.com/emacs-lsp/emacs/issues/7
Further, it seems that at least for some users the current solution is 
not working very well: https://github.com/emacs-lsp/emacs/issues/9, but 
that seems macOS specific.
Anyway, I think it might need more work to get into upstreamable shape, 
but it's up for discussion how much it's going to be. Overall, the diff 
is not huge, and the first question would be is how generic we'd want 
this feature to be, or whether a separate JSON-parsing thread is 
more-or-less fine.