From: Yuan Fu <casouri@gmail.com>
Date: Thu, 28 Sep 2023 06:42:32 +0000 (-0700)
Subject: ; * admin/notes/tree-sitter/performance (Experiments): Update.
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=5ad8db88df8e80e2e00dfb16fa592c793735ff61;p=emacs.git

; * admin/notes/tree-sitter/performance (Experiments): Update.
---

diff --git a/admin/notes/tree-sitter/performance b/admin/notes/tree-sitter/performance
index 315a550be34..23f84743ced 100644
--- a/admin/notes/tree-sitter/performance
+++ b/admin/notes/tree-sitter/performance
@@ -13,3 +13,13 @@ range, so you have to update the ranges every time before
 parsing. Fortunately, changing ranges doesn’t invalidate incremental
 parsing, so there isn’t any performance lost in update ranges
 frequently.
+
+* Experiments
+
+Using regexp by default in treesit-simple-indent-rules seems wasteful,
+so I tried replacing all string-match-p to equal in
+treesit-simple-indent-presets, and indent xdisp.c for a comparison.
+Turns out using regexp by default is faster: regexp-based indent took
+45s and equal-based indent took 75s.
+
+I could be missing something, further experiments are welcome.