On 1/27/2011 12:26 PM, James Y Knight wrote:
On Jan 27, 2011, at 2:06 PM, Stefan Behnel wrote:
"Martin v. Löwis", 24.01.2011 21:17:
The Py_UNICODE type is still supported but deprecated. It is always
defined as a typedef for wchar_t, so the wstr representation can double
as Py_UNICODE representation.
It's too bad this isn't initialised by default, though. Py_UNICODE is the only
representation that can be used efficiently from C code and Cython relies on it
for fast text processing. This proposal will therefore likely have a pretty
negative performance impact on extensions written in Cython as the compiler
could no longer expect this representation to be available instantaneously.
But the whole point of the exercise is so that it doesn't have to store a
4byte-per-char representation when a 1byte-per-char rep would do. If cython
wants to work most efficiently with this proposal, it should learn to deal with
the three possible raw representations.
C was doing fast text processing on char long before Py_UNICODE existed,
or wchar_t.
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