imap: require ".$UID_MIN-$UID_END" suffix

Finish up the IMAP-only portion of iterative config reloading,
which allows us to create all sub-ranges of an inbox up front.
The InboxIdler still uses ->each_inbox which will struggle with
100K inboxes.

Having messages in the top-level newsgroup name of an inbox will
still waste bandwidth for clients which want to do full syncs
once there's a rollover to a new 50K range.  So instead, make
every inbox accessible exclusively via 50K slices in the form of
"$NEWSGROUP.$UID_MIN-$UID_END".

This introduces the DummyInbox, which makes $NEWSGROUP
and every parent component a selectable, empty inbox.
This aids navigation with mutt and possibly other MUAs.

Finally, the xt/perf-imap-list maintainer test is broken, now,
so remove it.  The grep perlfunc is already proven effective,
and we'll have separate tests for mocking out ~100k inboxes.

3 files changed, 8 insertions, 44 deletions

diff --git a/xt/imapd-mbsync-oimap.t b/xt/imapd-mbsync-oimap.t
index d2237a24..b2cb8737 100644
--- a/xt/imapd-mbsync-oimap.t
+++ b/xt/imapd-mbsync-oimap.t
@@ -13,12 +13,13 @@ my $inboxdir = $ENV{GIANT_INBOX_DIR};
 plan skip_all => "bad characters in $inboxdir" if $inboxdir =~ m![^\w\.\-/]!;
 my ($tmpdir, $for_destroy) = tmpdir();
 my $cfg = "$tmpdir/cfg";
-my $mailbox = 'inbox.test';
+my $newsgroup = 'inbox.test';
+my $mailbox = "$newsgroup.1-50000";
 {
         open my $fh, '>', $cfg or BAIL_OUT "open: $!";
         print $fh <<EOF or BAIL_OUT "print: $!";
 [publicinbox "test"]
-        newsgroup = $mailbox
+        newsgroup = $newsgroup
         address = oimap\@example.com
         inboxdir = $inboxdir
 EOF
diff --git a/xt/imapd-validate.t b/xt/imapd-validate.t
index f96ec879..b7b66d05 100644
--- a/xt/imapd-validate.t
+++ b/xt/imapd-validate.t
@@ -30,7 +30,7 @@ if ($test_tls && !-r $key || !-r $cert) {
 }
 my ($tmpdir, $for_destroy) = tmpdir();
 my %OPT = qw(User u Password p);
-my (%STARTTLS_OPT, %IMAPS_OPT, $td, $mailbox, $make_local_server);
+my (%STARTTLS_OPT, %IMAPS_OPT, $td, $newsgroup, $mailbox, $make_local_server);
 if (($ENV{IMAP_TEST_URL} // '') =~ m!\Aimap://([^/]+)/(.+)\z!) {
         ($OPT{Server}, $mailbox) = ($1, $2);
         $OPT{Server} =~ s/:([0-9]+)\z// and $OPT{Port} = $1 + 0;
@@ -39,6 +39,7 @@ if (($ENV{IMAP_TEST_URL} // '') =~ m!\Aimap://([^/]+)/(.+)\z!) {
 } else {
         require_mods(qw(DBD::SQLite));
         $make_local_server->();
+        $mailbox = "$newsgroup.1-50000";
 }
 
 my %opts = (imap => \%OPT, 'imap+compress' => { %OPT, Compress => 1 });
@@ -124,15 +125,15 @@ BEGIN {
 
 $make_local_server = sub {
         require PublicInbox::Inbox;
-        $mailbox = 'inbox.test';
-        my $ibx = { inboxdir => $inbox_dir, newsgroup => $mailbox };
+        $newsgroup = 'inbox.test';
+        my $ibx = { inboxdir => $inbox_dir, newsgroup => $newsgroup };
         $ibx = PublicInbox::Inbox->new($ibx);
         my $pi_config = "$tmpdir/config";
         {
                 open my $fh, '>', $pi_config or die "open($pi_config): $!";
                 print $fh <<"" or die "print $pi_config: $!";
 [publicinbox "test"]
-        newsgroup = $mailbox
+        newsgroup = $newsgroup
         inboxdir = $inbox_dir
         address = test\@example.com
 
diff --git a/xt/perf-imap-list.t b/xt/perf-imap-list.t
deleted file mode 100644
index 0f00f487..00000000
--- a/xt/perf-imap-list.t
+++ /dev/null
@@ -1,38 +0,0 @@
-#!perl -w
-# Copyright (C) 2020 all contributors <meta@public-inbox.org>
-# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
-use Test::More;
-use_ok 'PublicInbox::IMAP';
-use_ok 'PublicInbox::IMAPD';
-use PublicInbox::DS;
-use Benchmark qw(:all);
-my @n = map { { newsgroup => "inbox.comp.foo.bar.$_" } } (0..50000);
-push @n, map { { newsgroup => "xobni.womp.foo.bar.$_" } } (0..50000);
-my $self = { imapd => { grouplist => \@n } };
-my $n = scalar @n;
-my $t = timeit(1, sub {
-        PublicInbox::IMAPD::refresh_inboxlist($self->{imapd});
-});
-diag timestr($t). "refresh $n inboxes";
-
-open my $null, '>', '/dev/null' or BAIL_OUT "open: $!";
-my $ds = { sock => $null };
-my $nr = 200;
-diag "starting benchmark...";
-my $cmd_list = \&PublicInbox::IMAP::cmd_list;
-$t = timeit(1, sub {
-        for (0..$nr) {
-                my $res = $cmd_list->($self, 'tag', '', '*');
-                PublicInbox::DS::write($ds, $res);
-        }
-});
-diag timestr($t). "list all for $n inboxes $nr times";
-$nr = 20;
-$t = timeit(1, sub {
-        for (0..$nr) {
-                my $res = $cmd_list->($self, 'tag', 'inbox.', '%');
-                PublicInbox::DS::write($ds, $res);
-        }
-});
-diag timestr($t). "list partial for $n inboxes $nr times";
-done_testing;