From 213e03e1f9624faa4a3a9813f1eac5035c1eb62a Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Wed, 3 Aug 2022 20:03:55 +0000
Subject: miscidx: index inbox min/max article numbers

This will be used to speed up NNTP group listings and IMAP startup
with thousands of inboxes.
---
 lib/PublicInbox/Inbox.pm | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'lib/PublicInbox/Inbox.pm')

diff --git a/lib/PublicInbox/Inbox.pm b/lib/PublicInbox/Inbox.pm
index 0ad68810..3f70e69d 100644
--- a/lib/PublicInbox/Inbox.pm
+++ b/lib/PublicInbox/Inbox.pm
@@ -409,6 +409,16 @@ sub uidvalidity { $_[0]->{uidvalidity} //= eval { $_[0]->mm->created_at } }
 
 sub eidx_key { $_[0]->{newsgroup} // $_[0]->{inboxdir} }
 
+# only used by NNTP, so we need ->mm anyways
+sub art_min { $_[0]->{-art_min} //= eval { $_[0]->mm(1)->min } }
+
+# used by IMAP, too, which tries to avoid ->mm (but ->{mm} is likely
+# faster since it's smaller iff available)
+sub art_max {
+	$_[0]->{-art_max} //= eval { $_[0]->{mm}->max } //
+				eval { $_[0]->over(1)->max };
+}
+
 sub mailboxid { # rfc 8474, 8620, 8621
 	my ($self, $imap_slice) = @_;
 	my $pfx = defined($imap_slice) ? $self->{newsgroup} : $self->{name};
-- 
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