Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id E6462200C4C for ; Tue, 4 Apr 2017 14:26:45 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id E4DAA160B90; Tue, 4 Apr 2017 12:26:45 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id 39CD3160B81 for ; Tue, 4 Apr 2017 14:26:45 +0200 (CEST) Received: (qmail 36635 invoked by uid 500); 4 Apr 2017 12:26:44 -0000 Mailing-List: contact issues-help@commons.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: issues@commons.apache.org Delivered-To: mailing list issues@commons.apache.org Received: (qmail 36624 invoked by uid 99); 4 Apr 2017 12:26:44 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 04 Apr 2017 12:26:44 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id E77F8C210C for ; Tue, 4 Apr 2017 12:26:43 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -100.002 X-Spam-Level: X-Spam-Status: No, score=-100.002 tagged_above=-999 required=6.31 tests=[RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id A483NG-9f8aE for ; Tue, 4 Apr 2017 12:26:43 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id 014725FC90 for ; Tue, 4 Apr 2017 12:26:43 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id 8B742E0A12 for ; Tue, 4 Apr 2017 12:26:42 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id BDC552401A for ; Tue, 4 Apr 2017 12:26:41 +0000 (UTC) Date: Tue, 4 Apr 2017 12:26:41 +0000 (UTC) From: "Michael Borcherds (JIRA)" To: issues@commons.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (MATH-740) Some "FastMath" functions are slow MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Tue, 04 Apr 2017 12:26:46 -0000 [ https://issues.apache.org/jira/browse/MATH-740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15955077#comment-15955077 ] Michael Borcherds commented on MATH-740: ---------------------------------------- Note: as FastMath relies on Math.ulp(), Math.IEEEremainder(), Math.getExponent(), Math.powerOfTwoD() an implementation would be needed for those (with implications for testing), see MATH-1406 Also GWT 2.8 supports Math.doubleToLongBits() (probably very slow) but not Math.doubleToRawLongBits() > Some "FastMath" functions are slow > ---------------------------------- > > Key: MATH-740 > URL: https://issues.apache.org/jira/browse/MATH-740 > Project: Commons Math > Issue Type: Wish > Reporter: Gilles > Priority: Minor > Fix For: 4.0 > > Attachments: jafamatests.zip > > > From the two benchmarks we currently have in "FastMathTestPerfomance", we have that the following functions are much slower in "FastMath" than in either "Math" or "StrictMath" (the performance *loss*, for each of the benchmarks, is given in parentheses): > * log10 (46%, 36%) > * log1p (68%, 112%) > * tan (11%, 61%) > * atan (26%, 125%) > * atan2 (44%, 40%) -- This message was sent by Atlassian JIRA (v6.3.15#6346)