[654] Integrated parallel testing into Test::Harness.

[Michael G Schwern]

Andy Armstrong wrote:
> On 1 Oct 2007, at 17:31, andy at hexten.net wrote:
>> Integrated parallel testing into Test::Harness.
>> Good news: it works
>> Bad news: it's not very fast on CPU intensive tests
> 
> Specifically prove -rb -Q for Regexp::Common takes 27 seconds  
> normally and 33 seconds in -j 9 mode. I choose to find solace in  
> Schwern's observation that Regexp::Common isn't typical. Can anyone  
> recommend some nice I/O intensive tests to make us look good? :)

DBI went from 65 wallclock to 31 with -j9.  Of course lots of stuff failed
because the tests aren't parallel safe.


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