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e5bdccc77b
Optimization of str.format() for cases with str, unicode, int, long, and float arguments. This gives about 30% speed improvement for the simplest (but most common) cases. This patch skips the __format__ dispatch, and also avoids creating an object to hold the format_spec. Unfortunately there's a complication in 2.6 with int, long, and float because they always expect str format_specs. So in the unicode version of this optimization, just check for unicode objects. int, float, long, and str can be added later, if needed.
bits shared by the stringobject and unicodeobject implementations (and
possibly other modules, in a not too distant future).
the stuff in here is included into relevant places; see the individual
source files for details.
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the following defines used by the different modules:
STRINGLIB_CHAR
the type used to hold a character (char or Py_UNICODE)
STRINGLIB_EMPTY
a PyObject representing the empty string
int STRINGLIB_CMP(STRINGLIB_CHAR*, STRINGLIB_CHAR*, Py_ssize_t)
compares two strings. returns 0 if they match, and non-zero if not.
Py_ssize_t STRINGLIB_LEN(PyObject*)
returns the length of the given string object (which must be of the
right type)
PyObject* STRINGLIB_NEW(STRINGLIB_CHAR*, Py_ssize_t)
creates a new string object
STRINGLIB_CHAR* STRINGLIB_STR(PyObject*)
returns the pointer to the character data for the given string
object (which must be of the right type)