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From: "d.thibaud at systemique dot fr" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/17211] New: tan function is very slow compared to tanf function
Date: Tue, 29 Jul 2014 09:36:00 -0000 [thread overview]
Message-ID: <bug-17211-131@http.sourceware.org/bugzilla/> (raw)
https://sourceware.org/bugzilla/show_bug.cgi?id=17211
Bug ID: 17211
Summary: tan function is very slow compared to tanf function
Product: glibc
Version: 2.18
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: d.thibaud at systemique dot fr
Created attachment 7729
--> https://sourceware.org/bugzilla/attachment.cgi?id=7729&action=edit
source code used to verify tan slowdown
Why tan function from 2.18 (fedora 20) is very slow compared to same function
in 2.12 (cents 6.5) or tanf from 2.18 ?
code provided with tanf function runs in 125ms. Same code with tan function
takes 3.2s.
This is a huge slowdown in code using tan instead of tanf.
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next reply other threads:[~2014-07-29 9:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-29 9:36 d.thibaud at systemique dot fr [this message]
2015-02-13 21:59 ` [Bug math/17211] " jsm28 at gcc dot gnu.org
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