nntp: use substr to check for trailing CRLF

Regexps consume more CPU cycles and memory, and aren't
necessary here since we just converted the entire buffer
to CRLF.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/NNTP.pm b/lib/PublicInbox/NNTP.pm
index 8ad7adc1..b223eb07 100644
--- a/lib/PublicInbox/NNTP.pm
+++ b/lib/PublicInbox/NNTP.pm
@@ -502,7 +502,7 @@ sub msg_body_write ($$) {
         # these can momentarily double the memory consumption :<
         $$msg =~ s/^\./../smg;
         $$msg =~ s/(?<!\r)\n/\r\n/sg; # Alpine barfs without this
-        $$msg .= "\r\n" unless $$msg =~ /\r\n\z/s;
+        $$msg .= "\r\n" unless substr($$msg, -2, 2) eq "\r\n";
         $self->msg_more($$msg);
 }