public inbox for glibc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug math/17211] New: tan function is very slow compared to tanf function
@ 2014-07-29 9:36 d.thibaud at systemique dot fr
2015-02-13 21:59 ` [Bug math/17211] " jsm28 at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: d.thibaud at systemique dot fr @ 2014-07-29 9:36 UTC (permalink / raw)
To: glibc-bugs
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.
--
You are receiving this mail because:
You are on the CC list for the bug.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug math/17211] tan function is very slow compared to tanf function
2014-07-29 9:36 [Bug math/17211] New: tan function is very slow compared to tanf function d.thibaud at systemique dot fr
@ 2015-02-13 21:59 ` jsm28 at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2015-02-13 21:59 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17211
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
--
You are receiving this mail because:
You are on the CC list for the bug.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2015-02-13 21:59 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-07-29 9:36 [Bug math/17211] New: tan function is very slow compared to tanf function d.thibaud at systemique dot fr
2015-02-13 21:59 ` [Bug math/17211] " jsm28 at gcc dot gnu.org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).