Index: Python/pystate.c
===================================================================
--- Python/pystate.c	(révision 77891)
+++ Python/pystate.c	(copie de travail)
@@ -154,8 +154,8 @@
 	return self->frame;
 }
 
-PyThreadState *
-PyThreadState_New(PyInterpreterState *interp)
+static PyThreadState *
+new_threadstate(PyInterpreterState *interp, int init)
 {
 	PyThreadState *tstate = (PyThreadState *)malloc(sizeof(PyThreadState));
 
@@ -193,9 +193,8 @@
 		tstate->c_profileobj = NULL;
 		tstate->c_traceobj = NULL;
 
-#ifdef WITH_THREAD
-		_PyGILState_NoteThreadState(tstate);
-#endif
+		if (init)
+			_PyThreadState_Init(tstate);
 
 		HEAD_LOCK();
 		tstate->next = interp->tstate_head;
@@ -206,6 +205,25 @@
 	return tstate;
 }
 
+PyThreadState *
+PyThreadState_New(PyInterpreterState *interp)
+{
+	return new_threadstate(interp, 1);
+}
+
+PyThreadState *
+_PyThreadState_Prealloc(PyInterpreterState *interp)
+{
+	return new_threadstate(interp, 0);
+}
+
+void
+_PyThreadState_Init(PyThreadState *tstate)
+{
+#ifdef WITH_THREAD
+	_PyGILState_NoteThreadState(tstate);
+#endif
+}
 
 void
 PyThreadState_Clear(PyThreadState *tstate)
Index: Include/pystate.h
===================================================================
--- Include/pystate.h	(révision 77891)
+++ Include/pystate.h	(copie de travail)
@@ -105,6 +105,8 @@
 PyAPI_FUNC(void) PyInterpreterState_Delete(PyInterpreterState *);
 
 PyAPI_FUNC(PyThreadState *) PyThreadState_New(PyInterpreterState *);
+PyAPI_FUNC(PyThreadState *) _PyThreadState_Prealloc(PyInterpreterState *);
+PyAPI_FUNC(void) _PyThreadState_Init(PyThreadState *);
 PyAPI_FUNC(void) PyThreadState_Clear(PyThreadState *);
 PyAPI_FUNC(void) PyThreadState_Delete(PyThreadState *);
 #ifdef WITH_THREAD
Index: Modules/threadmodule.c
===================================================================
--- Modules/threadmodule.c	(révision 77891)
+++ Modules/threadmodule.c	(copie de travail)
@@ -427,6 +427,7 @@
 	PyObject *func;
 	PyObject *args;
 	PyObject *keyw;
+	PyThreadState *tstate;
 };
 
 static void
@@ -436,8 +437,9 @@
 	PyThreadState *tstate;
 	PyObject *res;
 
-	tstate = PyThreadState_New(boot->interp);
-
+	tstate = boot->tstate;
+	tstate->thread_id = PyThread_get_thread_ident();
+	_PyThreadState_Init(tstate);
 	PyEval_AcquireThread(tstate);
 	nb_threads++;
 	res = PyEval_CallObjectWithKeywords(
@@ -502,6 +504,11 @@
 	boot->func = func;
 	boot->args = args;
 	boot->keyw = keyw;
+	boot->tstate = _PyThreadState_Prealloc(boot->interp);
+	if (boot->tstate == NULL) {
+		PyMem_DEL(boot);
+		return PyErr_NoMemory();
+	}
 	Py_INCREF(func);
 	Py_INCREF(args);
 	Py_XINCREF(keyw);
@@ -512,6 +519,7 @@
 		Py_DECREF(func);
 		Py_DECREF(args);
 		Py_XDECREF(keyw);
+		PyThreadState_Clear(boot->tstate);
 		PyMem_DEL(boot);
 		return NULL;
 	}