return 1 unless want_request_timer();
my $now = $self->get_request_time;
- my $diff = int((($now - ($self->{previous_log_time} // 0)) * 10_000 + 5) / 10);
+
+ return 1 unless $now;
+
+ my $diff = $self->{previous_log_time} ? int((($now - ($self->{previous_log_time} // 0)) * 10_000 + 5) / 10) : $now * 10_0000 + 5;
$self->{previous_log_time} = $now;
$self->_write("time", "${now}s Δ ${diff}ms" . (@slurp ? " (@slurp)" : ''));