Thread priorities

[Hal Murray]

Matthew.Selsky at twosigma.com said:
> I sounds like we would want a release out before we start mucking with
> threads given that your review of the code shows a lot of potential
> complexity. 

It's not so much the complexity as the time.  We've been talking about a 
release for a long time.  How much longer do we want to wait?


> - Are we OK with dropping python 2.6 support if needed for the waf upgrade?

A while ago, I suggested dropping support for 2.6 and got a lot of 
pushback.

Can we keep 2 copies of waf around?  Default to the new one but publish a 
recipe for how to switch to the old one if you don't have Python3?  Do we 
have to change any of our wscript or wafhelpers code?


-- 
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