From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail
From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: MPS codegen
Date: Fri, 14 Jun 2024 09:37:06 +0300
Message-ID: <86zfroxc6l.fsf@gnu.org>
References: <m234pkex30.fsf@pro2.fritz.box> <87le3b43qi.fsf@gmail.com>
 <m21q52u5v1.fsf@pro2.fritz.box> <86r0d21tqj.fsf@gnu.org>
 <m2frtir3nq.fsf@pro2.fritz.box> <877cetgqiz.fsf_-_@gmail.com>
 <m21q513tv3.fsf@pro2.fritz.box> <87wmmsg2e4.fsf@gmail.com>
 <m234pg1z0o.fsf@pro2.fritz.box> <87plskg035.fsf@gmail.com>
 <m2y178vfl9.fsf@pro2.fritz.box> <87ed90fyd3.fsf@gmail.com>
 <m2tthwvdkq.fsf@pro2.fritz.box>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit
Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214";
	logging-data="3536"; mail-complaints-to="usenet@ciao.gmane.io"
Cc: eller.helmut@gmail.com, emacs-devel@gnu.org
To: Gerd =?iso-8859-1?Q?M=F6llmann?= <gerd.moellmann@gmail.com>
Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Jun 14 08:37:58 2024
Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>
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 <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>)
	id 1sI0ZS-0000hR-1M
	for ged-emacs-devel@m.gmane-mx.org; Fri, 14 Jun 2024 08:37:58 +0200
Original-Received: from localhost ([::1] helo=lists1p.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.90_1)
	(envelope-from <emacs-devel-bounces@gnu.org>)
	id 1sI0Yi-0002qG-5W; Fri, 14 Jun 2024 02:37:12 -0400
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 <eliz@gnu.org>) id 1sI0Yg-0002pZ-55
 for emacs-devel@gnu.org; Fri, 14 Jun 2024 02:37:10 -0400
Original-Received: from fencepost.gnu.org ([2001:470:142:3::e])
 by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <eliz@gnu.org>)
 id 1sI0Yf-0005R9-GO; Fri, 14 Jun 2024 02:37:09 -0400
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org;
 s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From:
 Date; bh=CDuMozZZ3TCiUroHnrcKNu7OTm9Ep5JZg1oFR9fTod8=; b=CJ6ejrwbNPtXmnSneNho
 /uxkEfbHSRooVLb4YW2b2Z2zD4wJO18pnDS2NILVdqMJxa2EwzECTaLrLn1UQneIu58c7KE9MrOr2
 9f2jC2diVq11G9qRiWBW1LH25fmWUNdpgB/Hjpl57eHaNEvjJc3bYTNpqAtqtRJNu2l8tTaHN87Be
 qxl4xyj7x09dK7enzVDlMu14i4D2kBJliL49veCtVG851DUAFK7nwK9VIsBdmVUv9vzRBxwMKPDLs
 jDjVSFi2O69rmC+c/NTSuN1zbEiKiLG11TF3G5PIlYbg8ES83ukdW/iwNY0cYsMwqed+do9N20oVn
 fgfyCjTXADCwAw==;
In-Reply-To: <m2tthwvdkq.fsf@pro2.fritz.box> (message from Gerd
 =?iso-8859-1?Q?M=F6llmann?= on Thu, 13 Jun 2024 21:37:41 +0200)
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Emacs development discussions." <emacs-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-devel>,
 <mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/emacs-devel>
List-Post: <mailto:emacs-devel@gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-devel>,
 <mailto:emacs-devel-request@gnu.org?subject=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:320050
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/320050>

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,  emacs-devel@gnu.org
> Date: Thu, 13 Jun 2024 21:37:41 +0200
> 
> Maybe one could reserve + commit a suitable block upfront, maybe as one
> big IGC_OBJ_PAD, and use read(2) or so to read the .pdmp into that
> block.

Wouldn't that slow down startup?  pdumper uses memory-mapped files to
make that as fast as possible, and for a good reason: at the time
pdumper was introduced people objected to have startup slow down even
by a few hundreds of milliseconds.