From mboxrd@z Thu Jan 1 00:00:00 1970 From: Junio C Hamano Subject: Re: [GSoC] Designing a faster index format - Progress report week 13 Date: Tue, 24 Jul 2012 09:58:08 -0700 Message-ID: <7vy5m9f65b.fsf@alter.siamese.dyndns.org> References: <20120716203300.GA1849@tgummerer.surfnet.iacbox> <7vwr23zb65.fsf@alter.siamese.dyndns.org> <20120717082452.GC1849@tgummerer.surfnet.iacbox> <500C1AA9.4000306@dewire.com> <7vfw8jsk5o.fsf@alter.siamese.dyndns.org> <87629fvaxz.fsf@thomas.inf.ethz.ch> <7vr4s3pkqr.fsf@alter.siamese.dyndns.org> <500DD05D.8030708@dewire.com> <87d33lqsrp.fsf@thomas.inf.ethz.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Robin Rosenberg , Thomas Gummerer , , , , JGit Developers list To: Thomas Rast X-From: git-owner@vger.kernel.org Tue Jul 24 18:58:18 2012 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1StiR7-0001ZG-LT for gcvg-git-2@plane.gmane.org; Tue, 24 Jul 2012 18:58:18 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754366Ab2GXQ6M (ORCPT ); Tue, 24 Jul 2012 12:58:12 -0400 Received: from b-pb-sasl-quonix.pobox.com ([208.72.237.35]:58209 "EHLO smtp.pobox.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753780Ab2GXQ6L (ORCPT ); Tue, 24 Jul 2012 12:58:11 -0400 Received: from smtp.pobox.com (unknown [127.0.0.1]) by b-sasl-quonix.pobox.com (Postfix) with ESMTP id D99216525; Tue, 24 Jul 2012 12:58:10 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=from:to:cc :subject:references:date:in-reply-to:message-id:mime-version :content-type; s=sasl; bh=rJLMBF6O94n0tBMVUR0Lh2ZXuus=; b=i/5fb6 TnzWTftLjjVfx/khMkLKJ/ZuO1slPvu+oZJihAPWXlNjERIrq/tcyOi7oFplNh9i vXYddPySr8VxKF2K7nY8JCsOQ44bRgeWV+Zlg/blXJEZqkkcJ5cCCQW9WW2yoa2I xkq5lsgr+PnlB5bo4bBA0yBEezZrRkbPHTiow= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=from:to:cc :subject:references:date:in-reply-to:message-id:mime-version :content-type; q=dns; s=sasl; b=BFts8hVHKr3udpdax+1ow4RXdCDdx0iH oMqEIFoGlqg8MI756FPLhhKlYpChM4gFIKKOgZ3Mst4yNDb1WQ3lVUj8zSloYssQ 0/Ywp5YdRZBdLedRtxVHDWb5tWJ0P3n0Q5AgZwGsM44TaUz0Dk/OsZz6evtVd3Mt 7yAnWncVUGQ= Received: from b-pb-sasl-quonix.pobox.com (unknown [127.0.0.1]) by b-sasl-quonix.pobox.com (Postfix) with ESMTP id C76736524; Tue, 24 Jul 2012 12:58:10 -0400 (EDT) Received: from pobox.com (unknown [98.234.214.94]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by b-sasl-quonix.pobox.com (Postfix) with ESMTPSA id 3F9856523; Tue, 24 Jul 2012 12:58:10 -0400 (EDT) In-Reply-To: <87d33lqsrp.fsf@thomas.inf.ethz.ch> (Thomas Rast's message of "Tue, 24 Jul 2012 13:54:02 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) X-Pobox-Relay-ID: BF9472FC-D5B0-11E1-BA72-01B42E706CDE-77302942!b-pb-sasl-quonix.pobox.com Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Thomas Rast writes: > Junio's index-v4 was a speed boost mainly because it cuts down on the > size of the index. Do we want to throw that out? That's pretty much orthogonal, isn't it? The index-v4 is merely to show how a stupid prefix compression of pathnames without nothing else would reduce the file size and I/O cost, in order to set the bar for anything more clever than that. I thought that this discussion is about keeping, squishing, or discarding part of the cached stat info, and nobody is suggesting what to do with the prefix compression of pathnames.