[llvm] r299775 - [lit] Try using process pools by default again

[Reid Kleckner via llvm-commits]

On Fri, Apr 7, 2017 at 3:44 PM, Rafael Espíndola <rafael.espindola at gmail.com
> wrote:

> For what it is worth, I got exactly the same failures on freebsd
> before and after this.
>

Good to hear, I guess. Too bad there's still failures. :)

I think we should let this bake for a while longer and then remove the old
implementation.

If anyone wants to try speeding this up more, I think we spend a fair
amount of time pickling Test and lit_config objects. Anything we can do to
remove common shared data from those objects will speed up job scheduling
and improve CPU utilization.
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