From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-4.2 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 9E3002013A for ; Wed, 15 Feb 2017 16:44:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751430AbdBOQoU (ORCPT ); Wed, 15 Feb 2017 11:44:20 -0500 Received: from cloud.peff.net ([104.130.231.41]:55867 "EHLO cloud.peff.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751210AbdBOQoT (ORCPT ); Wed, 15 Feb 2017 11:44:19 -0500 Received: (qmail 3472 invoked by uid 109); 15 Feb 2017 16:44:19 -0000 Received: from Unknown (HELO peff.net) (10.0.1.2) by cloud.peff.net (qpsmtpd/0.84) with SMTP; Wed, 15 Feb 2017 16:44:19 +0000 Received: (qmail 15585 invoked by uid 111); 15 Feb 2017 16:44:19 -0000 Received: from sigill.intra.peff.net (HELO sigill.intra.peff.net) (10.0.0.7) by peff.net (qpsmtpd/0.84) with SMTP; Wed, 15 Feb 2017 11:44:19 -0500 Received: by sigill.intra.peff.net (sSMTP sendmail emulation); Wed, 15 Feb 2017 11:44:16 -0500 Date: Wed, 15 Feb 2017 11:44:16 -0500 From: Jeff King To: Jeff Hostetler Cc: Johannes Schindelin , git@vger.kernel.org, Junio C Hamano , Jeff Hostetler Subject: Re: [PATCH 0/5] A series of performance enhancements in the memihash and name-cache area Message-ID: <20170215164416.tekykkzhm6qlj2h2@sigill.intra.peff.net> References: <20170214220332.753i4tgclm62er4f@sigill.intra.peff.net> <16b1259c-4cdc-8f4d-db47-d724386a3d2b@jeffhostetler.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <16b1259c-4cdc-8f4d-db47-d724386a3d2b@jeffhostetler.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On Wed, Feb 15, 2017 at 09:27:53AM -0500, Jeff Hostetler wrote: > I have some informal numbers in a spreadsheet. I was seeing > a 8-9% speed up on a status on my gigantic repo. > > I'll try to put together a before/after perf-test to better > demonstrate this. Thanks. What I'm mostly curious about is how much each individual step buys. Sometimes when doing a long optimization series, I find that some of the optimizations make other ones somewhat redundant (e.g., if patch 2 causes us to call the optimized code from patch 3 less often). -Peff