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From: "Clément Pit-Claudel" <cpitclaudel@gmail.com>
To: emacs-devel@gnu.org
Subject: Re: prior work on non-backtracking regex engine?
Date: Wed, 17 Apr 2024 16:23:41 +0200	[thread overview]
Message-ID: <1a8ae194-92d7-407e-b9c0-200279c30bff@gmail.com> (raw)
In-Reply-To: <3a9IKoS2YLqJYosdfpFVdq8ashG0LPPJdB-ugdUgJEqM6-O3RWFeCu01FUPYBsp87xchkX-z1PRlNqJQm8ge_h3v0ziCWcME2fx-6PW-UP4=@hypnicjerk.ai>

On 3/10/24 16:41, Danny McClanahan wrote:
> (3) Have there been prior investigations of non-backtracking regex engines in emacs, or trying to use an external regex engine in general? What was the outcome, and does it seem like a useful research direction?

Here is a relevant thread:

  https://lists.gnu.org/archive/html/emacs-devel/2016-12/msg00622.html

The gap is indeed a significant issue.

If you wanted linear-time support, my guess is your best bets today would be RE2, rust-regex, or the linear engine in Chromium/V8.  All of them would require sizable changes, and none would replace the existing engine because they don't support backreferences.  The one in Chromium is fairly small and simple.

Clément.



      parent reply	other threads:[~2024-04-17 14:23 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-10 15:41 prior work on non-backtracking regex engine? Danny McClanahan
2024-03-12 23:45 ` Danny McClanahan
2024-03-13 13:23   ` Ihor Radchenko
2024-04-07  4:42     ` Danny McClanahan
2024-04-07 14:15       ` Ihor Radchenko
2024-04-08 12:19       ` Helmut Eller
2024-04-08 13:13         ` Eli Zaretskii
2024-04-08 14:00       ` Po Lu
2024-04-08 14:23         ` Eli Zaretskii
2024-04-12  0:12           ` Danny McClanahan
2024-04-17 14:23 ` Clément Pit-Claudel [this message]

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