From fb7d0067dc55fa8336dab96c07807fc7b28a1b20 Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Fri, 27 Nov 2020 09:52:44 +0000
Subject: [PATCH] nntpd: share {groups} hash with {-by_newsgroup} in Config

There's no need to duplicate a potentially large hash,
but we can keep the inexpensive shortcut to it.  We may
eventually drop the {groups} shortcut if it's no longer
useful.
---
 lib/PublicInbox/Config.pm |  4 +++-
 lib/PublicInbox/NNTPD.pm  | 23 +++++++++++------------
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/lib/PublicInbox/Config.pm b/lib/PublicInbox/Config.pm
index 251008a3..e7aea99b 100644
--- a/lib/PublicInbox/Config.pm
+++ b/lib/PublicInbox/Config.pm
@@ -438,7 +438,9 @@ EOF
 		}
 	}
 	if (my $ng = $ibx->{newsgroup}) {
-		$self->{-by_newsgroup}->{$ng} = $ibx;
+		# PublicInbox::NNTPD does stricter (and more expensive checks),
+		# keep this lean for startup speed
+		$self->{-by_newsgroup}->{$ng} = $ibx unless ref($ng);
 	}
 	$self->{-by_name}->{$name} = $ibx;
 	if ($ibx->{obfuscate}) {
diff --git a/lib/PublicInbox/NNTPD.pm b/lib/PublicInbox/NNTPD.pm
index 6b762d89..13b0f678 100644
--- a/lib/PublicInbox/NNTPD.pm
+++ b/lib/PublicInbox/NNTPD.pm
@@ -36,11 +36,10 @@ sub new {
 sub refresh_groups {
 	my ($self, $sig) = @_;
 	my $pi_config = $sig ? PublicInbox::Config->new : $self->{pi_config};
-	my $new = {};
-	my @list;
+	my $groups = $pi_config->{-by_newsgroup}; # filled during each_inbox
 	$pi_config->each_inbox(sub {
-		my ($ng) = @_;
-		my $ngname = $ng->{newsgroup} or return;
+		my ($ibx) = @_;
+		my $ngname = $ibx->{newsgroup} or return;
 		if (ref $ngname) {
 			warn 'multiple newsgroups not supported: '.
 				join(', ', @$ngname). "\n";
@@ -50,21 +49,21 @@ sub refresh_groups {
 		# '|', '<', '>', ';', '#', '$', '&',
 		} elsif ($ngname =~ m![^A-Za-z0-9/_\.\-\~\@\+\=:]!) {
 			warn "newsgroup name invalid: `$ngname'\n";
-		} elsif ($ng->nntp_usable) {
+			delete $groups->{$ngname};
+		} elsif ($ibx->nntp_usable) {
 			# Only valid if msgmap and search works
-			$new->{$ngname} = $ng;
-			push @list, $ng;
 
 			# preload to avoid fragmentation:
-			$ng->description;
-			$ng->base_url;
+			$ibx->description;
+			$ibx->base_url;
+		} else {
+			delete $groups->{$ngname};
 		}
 	});
-	@list =	sort { $a->{newsgroup} cmp $b->{newsgroup} } @list;
-	$self->{grouplist} = \@list;
+	$self->{grouplist} = [ map { $groups->{$_} } sort(keys %$groups) ];
 	$self->{pi_config} = $pi_config;
 	# this will destroy old groups that got deleted
-	%{$self->{groups}} = %$new;
+	$self->{groups} = $groups;
 }
 
 sub idler_start {
-- 
2.44.0