Brendan> Intuitively, given that the processor is much
Brendan> faster than the bus, and you are just waiting for processor to
Brendan> complete an addition or comparison before put the new memory
Brendan> value on the bus...
I think in Python's case the reference count will often be in the
processor's local cache. (Presumably, if the current thread is going to
Py_DECREF the object it's been working with the object's state recently.)
The stuff I read suggested that simply locking the local cache would be
significantly faster than having to lock the memory bus.
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Skip Montanaro - s...@pobox.com - http://smontanaro.dyndns.org/
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