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> On Nov 23, 2014, at 8:23 PM, Donald Stufft <donald at stufft.io> wrote:
> 
> I don’t really take performance issues that seriously for CPython. If you care about performance you should be using PyPy. I like that argument though because the same argument is used against the GCs which you like to use as an example too.
> 
> The verbosity isn’t really pointless, you have to be verbose in either situation, either explicit locks or explicit context switches. If you don’t have explicit locks you just have buggy software instead.

Funny thing is that relational databases will lock on things whether or not the calling code is using an async system.  Locks are a necessary thing in many cases.  That lock-based concurrency code can’t be mathematically proven bug free doesn’t detract from its vast usefulness in situations that are not aeronautics or medical devices.