Re: Measuring water quality of the CPAN river

> On 11 May 2015, at 01:47, Kent Fredric <[email protected]> wrote:
> So the quality of a dist could be measured indirectly by the failure rate of its dependents.

This was kind of the basis of the “River Smoker” idea that Tux and and I discussed late on the last day of the QAH:

	http://neilb.org/2015/04/24/cpan-downstream-testing.html

> Or as an analogy, we have 2 sampling points in the river 100m apart.
> 
> If we sample at point 1, we can't sense the fecal matter because it enters the river downstream of the sampling point.
> 
> But the fecal matter is sampled at point 2, so by conjecture, either point 2 created it, or it entered between points 1 and 2.
> 
> Sampling across the river at point 2 helps infer where the probable fecal matter is.

Sort of a cpan bisest, or rather a cpan testers bisect: look at 2 or more CPAN Testers fails where the only difference is an upriver version number.

Neil