--- Comment #19 from bartoldeman at users dot sourceforge dot net
2009-06-04 04:03 ---
Thanks for all the work -- another text processing program which changes some
headers in big ASCII files (which is what inspired this bug) went from around
real0m2.026s
user0m1.764s
sys
--- Comment #17 from jvdelisle at gcc dot gnu dot org 2009-05-27 01:22
---
Subject: Bug 37754
Author: jvdelisle
Date: Wed May 27 01:21:22 2009
New Revision: 147887
URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=147887
Log:
2009-05-23 Jerry DeLisle jvdeli...@gcc.gnu.org
--- Comment #18 from jvdelisle at gcc dot gnu dot org 2009-05-27 01:47
---
Fixed on 4.4, closing
--
jvdelisle at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #16 from jvdelisle at gcc dot gnu dot org 2009-05-20 00:16
---
Subject: Bug 37754
Author: jvdelisle
Date: Wed May 20 00:16:38 2009
New Revision: 147725
URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=147725
Log:
2009-05-19 Jerry DeLisle jvdeli...@gcc.gnu.org
--
jakub at gcc dot gnu dot org changed:
What|Removed |Added
Target Milestone|4.4.0 |4.4.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37754
--- Comment #15 from jvdelisle at gcc dot gnu dot org 2009-04-05 22:35
---
Fixed on 4.5, good for 4.4 after some main line testing/exercise.
--
jvdelisle at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #12 from jvdelisle at gcc dot gnu dot org 2009-01-09 05:34
---
With Janne's patch and some minor tweaks.
countlines.f
gfortran 4.4 patched: 2.2 seconds
gfortran 4.3: 3.5 seconds
g77 : 2.7 seconds
ifort : 1.1 seconds
--
--- Comment #11 from jb at gcc dot gnu dot org 2009-01-05 22:14 ---
Patch that improves countlines.f test (and a bunch of other things):
http://gcc.gnu.org/ml/gcc-patches/2009-01/msg00222.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37754
--- Comment #10 from jvdelisle at gcc dot gnu dot org 2008-11-26 03:59
---
Un assigning myself since I think Janne is working on this and I would hate to
duplicate effort. If I need to pick back up on this, let me know.
--
jvdelisle at gcc dot gnu dot org changed:
What
--- Comment #9 from jvdelisle at gcc dot gnu dot org 2008-11-22 05:34
---
*** Bug 38199 has been marked as a duplicate of this bug. ***
--
jvdelisle at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #7 from jvdelisle at gcc dot gnu dot org 2008-11-21 05:23
---
From some experiments I have done, we can make substantial improvement by
streamlining next_char. What I have in mind is reading a whole or partial
block of a file and returning a pointer. Then advancing
--- Comment #8 from jb at gcc dot gnu dot org 2008-11-21 07:43 ---
(In reply to comment #7)
From some experiments I have done, we can make substantial improvement by
streamlining next_char. What I have in mind is reading a whole or partial
block of a file and returning a pointer.
--- Comment #4 from jvdelisle at gcc dot gnu dot org 2008-10-25 23:56
---
Created an attachment (id=16547)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16547action=view)
Experimental patch
With this patch, I see some improvement with a more realistic test case. Here
are test
--- Comment #5 from jvdelisle at gcc dot gnu dot org 2008-10-25 23:58
---
Created an attachment (id=16548)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16548action=view)
The test program used above.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37754
--- Comment #6 from jvdelisle at gcc dot gnu dot org 2008-10-25 23:59
---
Created an attachment (id=16549)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16549action=view)
Program to generate simple test file used above.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37754
--
jakub at gcc dot gnu dot org changed:
What|Removed |Added
Priority|P3 |P4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37754
--
pinskia at gcc dot gnu dot org changed:
What|Removed |Added
Summary|READ I/O Performance|[4.4 Regression] READ I/O
|regression from 4.3 to
--- Comment #1 from jvdelisle at gcc dot gnu dot org 2008-10-07 02:55
---
I am a bit stacked up, but I will explore this one a bit.
--
jvdelisle at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #2 from jvdelisle at gcc dot gnu dot org 2008-10-07 03:58
---
strace shows no difference in number of system calles between 4.3 and 4.4.
gprof has some interesting things to see.
With 4.4:
% cumulative self self total
time seconds
--- Comment #3 from jvdelisle at gcc dot gnu dot org 2008-10-07 04:25
---
With the following test program I created a file to read useing a write in
place of the read.
program testio
implicit none
integer :: i, k
real :: x
real(kind=8) :: y
complex :: c
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