www: compile mbox regexp only once

No need for 'x' modifier to span more lines, though

diff --git a/lib/PublicInbox/WWW.pm b/lib/PublicInbox/WWW.pm
index c99c25f827cc79db447044c6a5ca639e29add4d9..278d786d13755242b0edc72b1e0591b3040cc047 100644 (file)
--- a/lib/PublicInbox/WWW.pm
+++ b/lib/PublicInbox/WWW.pm
@@ -51,7 +51,7 @@ sub run {
        } elsif ($path_info =~ m!$LISTNAME_RE/t/(\S+)/\z!o) {
                invalid_list_mid(\%ctx, $1, $2) || get_thread(\%ctx);
 
-       } elsif ($path_info =~ m!$LISTNAME_RE/t/(\S+)/mbox(\.gz)?\z!x) {
+       } elsif ($path_info =~ m!$LISTNAME_RE/t/(\S+)/mbox(\.gz)?\z!o) {
                my $sfx = $3;
                invalid_list_mid(\%ctx, $1, $2) ||
                        get_thread_mbox(\%ctx, $sfx);