cpu.diff

diff --git a/lib/Minion/Backend/File.pm b/lib/Minion/Backend/File.pm
index 067cb69..96a48a6 100644
--- a/lib/Minion/Backend/File.pm
+++ b/lib/Minion/Backend/File.pm
@@ -10,7 +10,7 @@ use Time::HiRes qw(time usleep);
 sub db {
   my $self = shift;
   @$self{qw(db pid)} = (undef, $$) if ($self->{pid} //= $$) ne $$;
-  return $self->{db} ||= DBM::Deep->new(@{$self->{args}});
+  return $self->{db} ||= DBM::Deep->new($self->{file});
 }
 
 sub dequeue {
@@ -70,7 +70,7 @@ sub list_workers {
   return [map { $self->_worker_info($_->{id}) } @workers];
 }
 
-sub new { shift->SUPER::new(args => [@_]) }
+sub new { shift->SUPER::new(file => shift) }
 
 sub register_worker {
   my ($self, $id) = @_;
@@ -185,6 +185,10 @@ sub _jobs { shift->db->{jobs} //= {} }
 sub _try {
   my ($self, $id, $options) = @_;
 
+  my $old = $self->{changes} ||= [0, 0];
+  my $new = $self->{changes} = [(stat $self->{file})[7, 9]];
+  return undef if $new->[0] == $old->[0] && $new->[1] == $old->[1];
+
   my $guard  = $self->_exclusive;
   my @ready  = grep { $_->{state} eq 'inactive' } values %{$self->_jobs};
   my %queues = map { $_ => 1 } @{$options->{queues} || ['default']};