lei pmdir: fix nproc for <= 4 CPUs

I forgot my FreeBSD VM has 8 cores, actually, and tweaked the
nproc detection on that machine before finalizing commit
10b523eb017162240b1ac3647f8dcbbf2be348a7
("lei import: speed up repeated Maildir imports")

Fixes: 10b523eb01716224 ("lei import: speed up repeated Maildir imports")

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/PublicInbox/LeiPmdir.pm b/lib/PublicInbox/LeiPmdir.pm
index 5efb012e..b71efe70 100644
--- a/lib/PublicInbox/LeiPmdir.pm
+++ b/lib/PublicInbox/LeiPmdir.pm
@@ -13,14 +13,14 @@ use parent qw(PublicInbox::IPC);
 sub new {
         my ($cls, $lei, $ipt) = @_;
         my $self = bless { -wq_ident => 'lei Maildir worker' }, $cls;
-        my $jobs = $lei->{opt}->{jobs};
+        my $jobs = $lei->{opt}->{jobs} // '';
         $jobs =~ /\A[0-9]+,([0-9]+)\z/ and $jobs = $1;
-        my $nproc = $jobs // do {
-                # untested with >=4 CPUs, though I suspect I/O latency
+        my $nproc = $jobs || do {
+                # barely tested with >=4 CPUs, though I suspect I/O latency
                 # of SATA SSD storage will make >=4 processes unnecessary,
                 # here.  NVMe users may wish to use '-j'
                 my $n = $self->detect_nproc;
-                $n = 4 if $n > 4;
+                $n = $n > 4 ? 4 : $n;
         };
         my ($op_c, $ops) = $lei->workers_start($self, $nproc,
                 undef, { ipt => $ipt }); # LeiInput subclass