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[24.61.240.80]) by smtp.googlemail.com with ESMTPSA id a3sm3733078qtx.56.2021.07.20.11.05.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 20 Jul 2021 11:05:38 -0700 (PDT) In-Reply-To: Content-Language: en-GB Received-SPF: pass client-ip=2607:f8b0:4864:20::f2b; envelope-from=cpitclaudel@gmail.com; helo=mail-qv1-xf2b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:271387 Archived-At: On 7/20/21 1:36 PM, Stefan Monnier wrote: >>> If we copy the buffer's content to a freshly malloc area before passing >>> that to TS, then there should be no problem running TS in a separate >>> concurrent thread, indeed. >> Except that the results will not be useful, since they won't apply to >> the original buffer if it is changed. > > Not true: we just have to keep track of the list of changes (as Yuan's > patch does), then pass it to tree-sitter to get a tree up-to-date w.r.t > the current content of the buffer. > >> And if the original buffer is not changed, then we do not need to run >> the parser asynchronously. > > We do: > - because we want to do other things in the mean time > - because we want to take advantage of the many CPU cores sitting idle. Ah, sorry, I didn't see your message, so I sent an answer that's approximately equivalent. But note that I'm not even sure we need to copy the buffer. Of course, I agree that it makes a lot of things a lot simpler.