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bpo-29735: Optimize partial_call(): avoid tuple (#516)

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* Add _PyObject_HasFastCall()
* partial_call() now avoids temporary tuple to pass positional
  arguments if the callable supports the FASTCALL calling convention
  for positional arguments.
* Fix also a performance regression in partial_call() if the callable
  doesn't support FASTCALL.
This commit is contained in:
Victor Stinner 2017-03-14 21:37:20 +01:00 • committed by GitHub
parent d4914e9041
commit 0f7b0b397e
3 changed files with 105 additions and 40 deletions
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4
Include/abstract.h
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@ -209,6 +209,10 @@ PyAPI_FUNC(int) _PyStack_UnpackDict(
40 bytes on the stack. */
#define _PY_FASTCALL_SMALL_STACK 5
/* Return 1 if callable supports FASTCALL calling convention for positional
arguments: see _PyObject_FastCallDict() and _PyObject_FastCallKeywords() */
PyAPI_FUNC(int) _PyObject_HasFastCall(PyObject *callable);
/* Call the callable object 'callable' with the "fast call" calling convention:
args is a C array for positional arguments (nargs is the number of
positional arguments), kwargs is a dictionary for keyword arguments.