From 21fcd8a37c82c1ef654d402cf592f0c9d803aa26 Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Sat, 23 Jul 2022 06:13:07 +0000
Subject: [PATCH] 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.
---
 lib/PublicInbox/NNTP.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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);
 }
 
-- 
2.44.0