I just tweaked roundcube for performance. The test results are promising it feels lighter. I’ll let you know how it goes this week.
These are my new settings.
/etc/roundcube/config.inc.php
82: $rcmail_config[‘imap_auth_type’] = LOGIN;
185: $rcmail_config[‘smtp_auth_type’] = ‘LOGIN’;
239: $rcmail_config[‘session_lifetime’] = 10;
388: $rcmail_config[‘message_sort_col’] = ‘’;
456: $rcmail_config[‘enable_spellcheck’] = false;
490: $rcmail_config[‘max_pagesize’] = 50;
494: $rcmail_config[‘min_keep_alive’] = 120;
504: $rcmail_config[‘undo_timeout’] = 0;
691: $rcmail_config[‘mail_pagesize’] = 50;
728: $rcmail_config[‘draft_autosave’] = 120;
731: $rcmail_config[‘preview_pane’] = true;
738: $rcmail_config[‘logout_purge’] = false;
741: $rcmail_config[‘logout_expunge’] = false;
754: $rcmail_config[‘skip_deleted’] = false;
766: $rcmail_config[‘keep_alive’] = 120;
769: $rcmail_config[‘check_all_folders’] = false;
For more info:
https://web.archive.org/web/20120426005946/http://trac.roundcube.net/wiki/Howto_Performance
They also suggest to include an imap proxy to improve performance:
Use a caching IMAP proxy
If you are experiencing delays when clicking on a message or folder (>0.5 sec) try adding a caching IMAP proxy on the webserver. Roundcube creates a new IMAP connection (which is expensive) every time a user clicks on a message. An IMAP proxy will reuse IMAP connections on a per user basis. There are reports of performance going from ~3 sec per click, to ~0.5 sec per click. ImapProxy is a free IMAP proxy module that is easy to use and works great for Unix-like OSes.