$group = 'inbox.test.perf.nntpd';
my $ibx = { inboxdir => $pi_dir, newsgroup => $group };
$ibx = PublicInbox::Inbox->new($ibx);
$group = 'inbox.test.perf.nntpd';
my $ibx = { inboxdir => $pi_dir, newsgroup => $group };
$ibx = PublicInbox::Inbox->new($ibx);