From: "Herman, Géza" <geza.herman@gmail.com>
To: "Mattias Engdegård" <mattias.engdegard@gmail.com>
Cc: "Herman, Géza" <geza.herman@gmail.com>,
"Gerd Möllmann" <gerd.moellmann@gmail.com>,
"Eli Zaretskii" <eliz@gnu.org>,
"Philip Kaludercic" <philipk@posteo.net>,
wellons@nullprogram.com, emacs-devel@gnu.org
Subject: Re: I created a faster JSON parser
Date: Tue, 19 Mar 2024 20:05:23 +0100 [thread overview]
Message-ID: <878r2erq4u.fsf@gmail.com> (raw)
In-Reply-To: <05E839F0-736C-42C0-8344-1C8945E90289@gmail.com>
Mattias Engdegård <mattias.engdegard@gmail.com> writes:
> 15 mars 2024 kl. 14.35 skrev Herman, Géza
> <geza.herman@gmail.com>:
>
>> I implemented this idea, here is the latest version (now,
>> object_workspace is a Lisp_Object):
>
> That's considerably slower than before, especially for small
> inputs, so it's probably a no-go.
Have you benchmarked it? I really doubt that there is a
significant performance difference. Maybe it's possible to find
some case, where this modification matters a bit, but for most
cases, the difference should be negligible. The amount of
allocations done is the same in both cases, which is for large
files, only 20-30 allocations. Compared to the thousands of
allocations for storing the actual Lisp objects.
> Here are some remaining tasks:
>
> 2. Don't allocate any temporary storage before you know that
> it's actually necessary.
Except for the very-very trivial cases, memory allocation is
always necessary. I can lower the allocation sizes, but I don't
think it's worth it. We're only talking about sizes of the KB
range.
> 3. Stop using the object_workspace when not required, which is
> everywhere except possibly when reading arrays into Lisp
> vectors.
object_workspace is necessary whenever a JSON contains an object
or array. So basically always.
next prev parent reply other threads:[~2024-03-19 19:05 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-08 10:27 I created a faster JSON parser Herman, Géza
2024-03-08 11:41 ` Philip Kaludercic
2024-03-08 12:34 ` Herman, Géza
2024-03-08 12:03 ` Eli Zaretskii
2024-03-08 12:38 ` Herman, Géza
2024-03-08 12:59 ` Eli Zaretskii
2024-03-08 13:12 ` Herman, Géza
2024-03-08 14:10 ` Eli Zaretskii
2024-03-08 14:24 ` Collin Funk
2024-03-08 15:20 ` Herman, Géza
2024-03-08 16:22 ` Eli Zaretskii
2024-03-08 18:34 ` Herman, Géza
2024-03-08 19:57 ` Eli Zaretskii
2024-03-08 20:22 ` Herman, Géza
2024-03-09 6:52 ` Eli Zaretskii
2024-03-09 11:08 ` Herman, Géza
2024-03-09 12:23 ` Lynn Winebarger
2024-03-09 12:58 ` Po Lu
2024-03-09 13:13 ` Eli Zaretskii
2024-03-09 14:00 ` Herman, Géza
2024-03-09 14:21 ` Eli Zaretskii
2024-03-08 13:28 ` Po Lu
2024-03-08 16:14 ` Herman, Géza
2024-03-09 1:55 ` Po Lu
2024-03-09 20:37 ` Christopher Wellons
2024-03-10 6:31 ` Eli Zaretskii
2024-03-10 21:39 ` Philip Kaludercic
2024-03-11 13:29 ` Eli Zaretskii
2024-03-11 14:05 ` Mattias Engdegård
2024-03-11 14:35 ` Herman, Géza
2024-03-12 9:26 ` Mattias Engdegård
2024-03-12 10:20 ` Gerd Möllmann
2024-03-12 11:14 ` Mattias Engdegård
2024-03-12 11:33 ` Gerd Möllmann
2024-03-15 13:35 ` Herman, Géza
2024-03-15 14:56 ` Gerd Möllmann
2024-03-19 18:49 ` Mattias Engdegård
2024-03-19 19:05 ` Herman, Géza [this message]
2024-03-19 19:18 ` Gerd Möllmann
2024-03-19 19:13 ` Gerd Möllmann
2024-03-12 10:58 ` Herman, Géza
2024-03-12 13:11 ` Mattias Engdegård
2024-03-12 13:42 ` Mattias Engdegård
2024-03-12 15:23 ` Herman, Géza
2024-03-12 15:39 ` Gerd Möllmann
2024-03-10 6:58 ` Herman, Géza
2024-03-10 16:54 ` Christopher Wellons
2024-03-10 20:41 ` Herman, Géza
2024-03-10 23:22 ` Christopher Wellons
2024-03-11 9:34 ` Herman, Géza
2024-03-11 13:47 ` Christopher Wellons
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