Hi,
I have not followed closely the changes that happen in 1.9.1, but was
surprised by the following:
x = np.zeros(12, d)
assert x.flags.aligned # fails
This is running numpy 1.9.1 built on windows with VS 2008. Is it expected
that zeros may return a non-aligned array ?
David
On Tue, Nov 18, 2014 at 11:20 AM, David Cournapeau courn...@gmail.com
wrote:
Hi,
I have not followed closely the changes that happen in 1.9.1, but was
surprised by the following:
x = np.zeros(12, d)
assert x.flags.aligned # fails
This is running numpy 1.9.1 built on windows with VS 2008.
On 18.11.2014 19:20, David Cournapeau wrote:
Hi,
I have not followed closely the changes that happen in 1.9.1, but was
surprised by the following:
x = np.zeros(12, d)
assert x.flags.aligned # fails
This is running numpy 1.9.1 built on windows with VS 2008. Is it
expected that zeros
It is on windows 32 bits, but I would need to make this work for complex
(pair of double) as well.
Is this a bug (I assumed array creation methods would always create
aligned arrays for their type) ? Seems like quite a bit of code out there
would assume this (scipy itself does for example).
Additional point: it seems to always return aligned data on 1.8.1 (same
platform/compiler/everything).
On Tue, Nov 18, 2014 at 6:35 PM, David Cournapeau courn...@gmail.com
wrote:
It is on windows 32 bits, but I would need to make this work for complex
(pair of double) as well.
Is this a bug
1.9 lies about alignment it doesn't actually check for new arrays.
is the array aligned?
On 18.11.2014 19:37, David Cournapeau wrote:
Additional point: it seems to always return aligned data on 1.8.1 (same
platform/compiler/everything).
On Tue, Nov 18, 2014 at 6:35 PM, David Cournapeau
On Tue, Nov 18, 2014 at 6:40 PM, Julian Taylor
jtaylor.deb...@googlemail.com wrote:
1.9 lies about alignment it doesn't actually check for new arrays.
When I do the following on 1.8.1 with win 32 bits:
x = np.zeros(12, D)
print x.aligned.flags == (x.__array_interface__[data][0] % 16 == 0)
32 bit windows should not provide 16 byte alignment, at least it doesn't
for me. That is typically a property of 64 bit OS.
But that does not explain why normal double is not aligned for you, that
only needs 4 bytes on i386 which even 32 bit OS should provide.
I though I tested scipy on 32 bit
18.11.2014, 21:44, David Cournapeau kirjoitti:
On Tue, Nov 18, 2014 at 7:05 PM, Julian Taylor
jtaylor.deb...@googlemail.com wrote:
32 bit windows should not provide 16 byte alignment, at least it doesn't
for me. That is typically a property of 64 bit OS.
But that does not explain why
