Improve performance by skipping redundant ENABLE commands

Aleksander Machniak

2012-06-26 7ab9c1775243217f3f6cb0717b1894a98303d04e

 program/include/rcube_imap_cache.php

@@ -917,18 +917,17 @@
            return;
        }

        // NOTE: make sure the mailbox isn't selected, before
        // enabling QRESYNC and invoking SELECT
        if ($this->imap->conn->selected !== null) {
            $this->imap->conn->close();
        }

        // Enable QRESYNC
        $res = $this->imap->conn->enable($qresync ? 'QRESYNC' : 'CONDSTORE');
        if (!is_array($res)) {
        if ($res === false) {
            return;
        }

        // Close mailbox if already selected to get most recent data
        if ($this->imap->conn->selected == $mailbox) {
            $this->imap->conn->close();
        }

        // Get mailbox data (UIDVALIDITY, HIGHESTMODSEQ, counters, etc.)
        $mbox_data = $this->imap->folder_data($mailbox);