[pypy-issue] [issue1121] [cpyext] speed up some macros

[Stefan Behnel]

Stefan Behnel <stefan_ml at behnel.de> added the comment:

For the ref-counting macros, here is a "stupid micro benchmark" in Cython:

def bench(x):
    cdef int i
    for i in xrange(10000):
        a = x
        b = x
        c = x
        d = x
        e = x
        f = x
        g = x

When always calling into Py_IncRef() and Py_DecRef(), I get this

$ pypy -m timeit -s 'from refcountbench import bench' 'bench(10)'
1000 loops, best of 3: 683 usec per loop

With the new macros for Py_INCREF() and Py_DECREF(), I get this:

$ pypy -m timeit -s 'from refcountbench import bench' 'bench(10)'
1000 loops, best of 3: 385 usec per loop

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status: unread -> chatting

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