On Aug 14, 2019, at 6:12 PM, Joel Gross <jag...@gmail.com> wrote: > I have a multi-threaded application that receives a large number of messages > (COM objects) in sudden bursts. During this time, I've noticed that if my > other thread attempts to create a new COM object via the Dispatch call, that > call seems to hang until the messages have been processed. This can take more > than a minute sometimes. > I am wondering if this is because the win32 side of things is still trying to > churn through all the messages? Is there a way to preempt this behavior to > ensure that the object I'm trying to create gets created immediately? > This is a complicated topic. Are you calling CoInitialize? By default, that will create a “single-threaded apartment”, where actions get handled by a single thread. You can try calling CoInitializeEx with COINIT_MULTITHREADED and see if that helps.
But even then, you bang up against the Python interpreter lock, which only allows the interpreter to handle one thread at a time. I wouldn’t think you’d have to wait for the whole set of object requests to drain, but threading in Python is always tricky. — Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc.
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