Since we started indexing the CRLF-adjusted size of messages,
we can take an order-of-magnitude speedup for certain MUAs
which fetch this attribute without needing much else.

Admins are encouraged to --reindex existing inboxes for IMAP
support, anyways.  It won't be fatal if it's not reindexed, but
some client bugs and warnings can be fixed and they'll be able
to support more of IMAP.
---
 lib/PublicInbox/IMAP.pm | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/lib/PublicInbox/IMAP.pm b/lib/PublicInbox/IMAP.pm
index 803ce31ff22..9cdcba693c7 100644
--- a/lib/PublicInbox/IMAP.pm
+++ b/lib/PublicInbox/IMAP.pm
@@ -53,7 +53,7 @@ my %FETCH_NEED = (
        'BODY[]' => [ NEED_BLOB, \&emit_rfc822 ],
        'RFC822.HEADER' => [ NEED_EML, \&emit_rfc822_header ],
        'RFC822.TEXT' => [ NEED_EML, \&emit_rfc822_text ],
-       'RFC822.SIZE' => [ NEED_BLOB, \&emit_rfc822_size ],
+       'RFC822.SIZE' => [ NEED_SMSG, \&emit_rfc822_size ],
        RFC822 => [ NEED_BLOB, \&emit_rfc822 ],
        BODY => [ NEED_EML, \&emit_body ],
        BODYSTRUCTURE => [ NEED_EML, \&emit_bodystructure ],
@@ -500,11 +500,12 @@ sub emit_rfc822 {
        $self->msg_more($$bref);
 }
 
-# Mail::IMAPClient::message_string cares about this by default
-# (->Ignoresizeerrors attribute)
+# Mail::IMAPClient::message_string cares about this by default,
+# (->Ignoresizeerrors attribute).  Admins are encouraged to
+# --reindex for IMAP support, anyways.
 sub emit_rfc822_size {
-       my ($self, $k, undef, $bref) = @_;
-       $self->msg_more(' RFC822.SIZE ' . length($$bref));
+       my ($self, $k, $smsg) = @_;
+       $self->msg_more(' RFC822.SIZE ' . $smsg->{bytes});
 }
 
 sub emit_internaldate {
--
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