symfony/symfony — comment on commit 9a0aefd1921351f6eb2655440900ec7345928b53
File: src/Symfony/Bundle/SwiftmailerBundle/EventListener/EmailSenderListener.php line 47
By vicb:

this currently adds overhead for every request as the transport always gets started, fix is in swiftmailer @ https://github.com/swiftmailer/swiftmailer/pull/152