On Thu, Jun 2, 2016 at 1:06 PM, Jeroen Demeyer wrote:
> On 2016-06-02 21:12, Robert Bradshaw wrote:
>>>
>>> "if isinstance(x, (int,long))", which is parsed as "if PyInt_Check(x) or
>>> PyLong_Check(x)" is slightly slower than "if PyInt_Check(x) ||
>>> PyLong_Check(x)".
>>
>> That is very surprisin
On 2016-06-02 21:12, Robert Bradshaw wrote:
"if isinstance(x, (int,long))", which is parsed as "if PyInt_Check(x) or
PyLong_Check(x)" is slightly slower than "if PyInt_Check(x) ||
PyLong_Check(x)".
That is very surprising. How much slower?
With GCC 4.9.3, roughly 4% for a simple loop like
fo
On Thu, Jun 2, 2016 at 12:57 AM, Jeroen Demeyer wrote:
> On 2016-06-02 05:43, Robert Bradshaw wrote:
>>>
>>> 2. "x || y" because Cython's "x or y" generates complicated code which
>>> isn't
>>> optimized as well as "x || y".
>>
>> I just tried using gcc -O3 and the resulting assembly is identical.
On 2016-06-02 05:43, Robert Bradshaw wrote:
2. "x || y" because Cython's "x or y" generates complicated code which isn't
optimized as well as "x || y".
I just tried using gcc -O3 and the resulting assembly is identical.
Well, that would depend on what x and y are.
A very concrete example:
"
On 2016-06-02 05:43, Robert Bradshaw wrote:
You can always define your own macro #define ASSIGN(a, b) (a = b).
That's basically my whole point. This ASSIGN should be called
cython.operator.assign.
___
cython-devel mailing list
cython-devel@python.or
On Wed, Jun 1, 2016 at 1:56 PM, Jeroen Demeyer wrote:
> On 2016-05-31 20:35, Robert Bradshaw wrote:
>>
>> I can't think of any fundamental reason these couldn't be implemented
>> in C, but there's really no need to do so as they can't be overridden
>> in C.
>
>
> Well, for the comma operator there
On 2016-05-31 20:35, Robert Bradshaw wrote:
I can't think of any fundamental reason these couldn't be implemented
in C, but there's really no need to do so as they can't be overridden
in C.
Well, for the comma operator there might be no reason. However, it would
be nice if one could generate a
I can't think of any fundamental reason these couldn't be implemented
in C, but there's really no need to do so as they can't be overridden
in C.
On Tue, May 31, 2016 at 3:28 AM, Jeroen Demeyer wrote:
> The following code
>
> cimport cython.operator
> cdef long foo(long x, long y):
> return c
The following code
cimport cython.operator
cdef long foo(long x, long y):
return cython.operator.comma(x, y)
gives AttributeError: 'CBinopNode' object has no attribute
'analyse_c_operation'
Is there any fundamental reason why such operators are only implemented
for C++ and not pure C? Wh
