反复与间歇使用GIL

Question

是否对频繁获得/发行GIL与谨慎获得/发行GIL进行过比较？你知道吗

例如，以^{} function defined here为例。如果开发人员想了解可能需要GIL的其他线程，他们可以将其重写为：

static PyObject *
keywdarg_parrot(PyObject *self, PyObject *args, PyObject *keywds)
{
    int voltage;
    char *state = "a stiff";
    char *action = "voom";
    char *type = "Norwegian Blue";

    static char *kwlist[] = {"voltage", "state", "action", "type", NULL};

    if (!PyArg_ParseTupleAndKeywords(args, keywds, "i|sss", kwlist,
                                     &voltage, &state, &action, &type))
        return NULL;

    Py_BEGIN_ALLOW_THREADS

    printf("-- This parrot wouldn't %s if you put %i Volts through it.\n", action, voltage);
    printf("-- Lovely plumage, the %s -- It's %s!\n", type, state);

    Py_END_ALLOW_THREADS

    Py_INCREF(Py_None);    
    return Py_None;
}

毕竟，GIL不需要来使用printf，那么为什么要让keywdarg_parrotbogart呢？现在想象一下这些微型GIL在C-library的其他地方都有。最好的办法是在你得到的任何机会释放GIL，还是越少越好？你知道吗