From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Philip Kaludercic Newsgroups: gmane.emacs.devel Subject: Re: I created a faster JSON parser Date: Fri, 08 Mar 2024 11:41:40 +0000 Message-ID: <8734t154sr.fsf@posteo.net> References: <87a5n96mb5.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29561"; mail-complaints-to="usenet@ciao.gmane.io" Cc: "emacs-devel@gnu.org" To: =?utf-8?Q?Herman=2C_G=C3=A9za?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Mar 08 12:42:41 2024 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1riYcb-0007UH-HL for ged-emacs-devel@m.gmane-mx.org; Fri, 08 Mar 2024 12:42:41 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1riYbn-0004qS-0X; Fri, 08 Mar 2024 06:41:51 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1riYbi-0004qD-UO for emacs-devel@gnu.org; Fri, 08 Mar 2024 06:41:46 -0500 Original-Received: from mout02.posteo.de ([185.67.36.66]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1riYbg-0002r0-Ss for emacs-devel@gnu.org; Fri, 08 Mar 2024 06:41:46 -0500 Original-Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 7BC43240103 for ; Fri, 8 Mar 2024 12:41:41 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1709898101; bh=Atv/PDFzMJKTpwAw3JJOFjm/ayzKLzVqV9OKASOmy00=; h=From:To:Cc:Subject:OpenPGP:Date:Message-ID:MIME-Version: Content-Type:Content-Transfer-Encoding:From; b=abRiQpzq/HAZWRX6k8JRtBm/gaUCaN2Y+hDXZWpgfvopW6l8pQwGNwIfBnap7Enaz 2Wq4hBEzhPzHPVzfYCeevoYUVjmdXzG3YU6k780rvUEk3vGwVNrx7IqyckCYOVlO+8 sGkqdBaKH/oMG70EI2GG/ROzQoq3+UBqJ5XEqUBk6xJL95grMah3/Dc683EEjG88Iv mCp9w2IKpNWFZeRwRDSLnE4tsJOP3HLUSDlLZ5rpEjBYk1prTf31ykdIHYKvopyCTA 6rzmD6627hy5i+LYp+SCwNaepZuwh0aWsMALIhlBeciq2EOwU0JO2UjLxC6CAeCgDA gMdBjLq4cQpVA== Original-Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4Trkln014hz9rxD; Fri, 8 Mar 2024 12:41:40 +0100 (CET) In-Reply-To: <87a5n96mb5.fsf@gmail.com> ("Herman, =?utf-8?Q?G=C3=A9za=22's?= message of "Fri, 08 Mar 2024 11:27:16 +0100") OpenPGP: id=7126E1DE2F0CE35C770BED01F2C3CC513DB89F66; url="https://keys.openpgp.org/vks/v1/by-fingerprint/7126E1DE2F0CE35C770BED01F2C3CC513DB89F66"; preference=signencrypt Received-SPF: pass client-ip=185.67.36.66; envelope-from=philipk@posteo.net; helo=mout02.posteo.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:316898 Archived-At: "Herman, G=C3=A9za" writes: > Hi, > > I created a faster JSON parser for emacs, you can check it out here: > > https://github.com/geza-herman/emacs/tree/faster-json-parsing For convenience, this is a URL to the patch: https://github.com/geza-herman/emacs/commit/d76feeeac3ce397f15aebdde8b9deae= 676b0bf1e.patch > > It replaces json-parse-string and json-parse-buffer functions. The > behavior should be the same as before, with the only exception that > objects with duplicated keys are not detected if :object-type is not > 'hash-table. Is that a problem? > This parser runs 8-9x faster than the jansson based parser on my > machine (tested on clangd language server messages). An additional > tiny benefit is that large integers are parsed, instead of having an > "out of range" error. That sounds interesting, but I am reminded of this article: https://seriot.ch/projects/parsing_json.html. There seem to be plenty of difficult edge-cases when dealing with JSON input, that should probably be tested if Emacs has it's own custom parser built-in. > What do you think? > > Geza --=20 Philip Kaludercic on peregrine