Updated to run *all* the policies at once (thereby only processing each file via PPI once), but still break out the test reports by policy.
Runtime for comparable tests now at 1m15s, down from 16m8s, ~13 times speedup. Memory usage stayed under 50M the whole time (using Perl::Critic 1.03) Stripping of languages/ files (RT#41231), we're down to 41s. (~24 times speedup) Please test on windows and close ticket if it works there.