reduce copies by passing string refs to Email::MIME

This should reduce data copies and memory usage, according
to Email::Simple documentation.

1 files changed, 2 insertions, 2 deletions

diff --git a/public-inbox-mda b/public-inbox-mda
index 096421bb..522eeff7 100755
--- a/public-inbox-mda
+++ b/public-inbox-mda
@@ -34,14 +34,14 @@ my $filtered; # string dest
 if (PublicInbox::MDA->precheck($filter, $dst->{address}) &&
     do_spamc($filter->simple, \$filtered)) {
         # update our message with SA headers (in case our filter rejects it)
-        my $msg = Email::Simple->new($filtered);
+        my $msg = Email::MIME->new(\$filtered);
         $filtered = undef;
         $filter->simple($msg);
 
         if (PublicInbox::Filter->run($msg)) {
                 # run spamc again on the HTML-free message
                 if (do_spamc($msg, \$filtered)) {
-                        $msg = Email::MIME->new($filtered);
+                        $msg = Email::MIME->new(\$filtered);
                         PublicInbox::MDA->set_list_headers($msg, $dst);
                         $filter->simple($msg);