[Python-Dev] Intricacies of calling __eq__
Hrvoje Niksic
hrvoje.niksic at avl.com
Wed Mar 19 14:08:13 CET 2014
On 03/18/2014 10:19 PM, Paul Moore wrote:
> Surely in the presence of threads the optimisation is invalid anyway
Why? As written, the code uses no synchronization primitives to ensure
that the modifications to the dict are propagated at a particular point.
As a consequence, it cannot rely on the modification done at a time that
coincides with execution at HERE to be immediately propagated to all
threads.
The optimization is as valid as a C compiler rearranging variable
assignments, which also "breaks" unsychronized threaded code.
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