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[Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is e
From: |
Rik |
Subject: |
[Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow |
Date: |
Mon, 23 Jul 2018 19:04:57 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0 |
Update of bug #54100 (project octave):
Status: Confirmed => In Progress
_______________________________________________________
Follow-up Comment #16:
I think this is a good start. The improvements in speed are impressive. For
testing, try
cd test
test io.tst
In this case, at least one of the tests is failing because while the
block_size is correct, it doesn't read N_blocks.
block_size: 2
N_block: 262144
***** test
[id, msg] = tmpfile ();
if (id < 0)
__printf_assert__ ("tmpfile failed: %s\n", msg);
else
unwind_protect
fwrite (id, char (0:15));
frewind (id);
[data, count] = fread (id, inf, "2*uint8", 2);
assert (data, [0; 1; 4; 5; 8; 9; 12; 13]);
assert (count, 8);
unwind_protect_cleanup
fclose (id);
end_unwind_protect
endif
!!!!! test failed
ASSERT errors for: assert (data,[0; 1; 4; 5; 8; 9; 12; 13])
Location | Observed | Expected | Reason
. O(4x1) E(8x1) Dimensions don't match
octave:7> [id, msg] = tmpfile ();
octave:8> fwrite (id, char (0:15));
octave:9> frewind (id);
octave:10> [data, count] = fread (id, inf, "2*uint8", 2);
while
block_size: 2
N_block: 262144
octave:11> count
count = 4
octave:12> data
data =
0
1
4
5
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?54100>
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- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Rik, 2018/07/20
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Dan Sebald, 2018/07/20
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Rik, 2018/07/22
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Rik, 2018/07/23
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Dan Sebald, 2018/07/23
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Dan Sebald, 2018/07/23
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow,
Rik <=
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Dan Sebald, 2018/07/24
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Rik, 2018/07/24
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Dan Sebald, 2018/07/29
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Rik, 2018/07/29
- [Octave-bug-tracker] [bug #54100] fread using SKIP larger than zero is extremely slow, Dan Sebald, 2018/07/29