[Domain Mapping] Domain Mapping 4.4.3.3 - high database cpu load

I had just upgraded from domain mapping plugin 4.4.2.4 to 4.4.3.3 and noticed a large jump in database CPU usage.

Other users have reported the same slow query issue: https://premium.wpmudev.org/forums/topic/domain-mapping-has-got-too-many-rows

The reason is that on every page load domain mapping plugin is running a show tables query, my database has over 100,000 tables and this is causing a lot of unnecessary load.

Query monitor defined the following files and line numbers as the problem:

domainmap_launch()
wp-content/plugins/domain-mapping/domain-mapping.php:144
Domainmap_Plugin->set_module()
wp-content/plugins/domain-mapping/classes/Domainmap/Plugin.php:174
Domainmap_Module_System->__construct()
wp-content/plugins/domain-mapping/classes/Domainmap/Module/System.php:45
Domainmap_Module_System->_upgrade()
wp-content/plugins/domain-mapping/classes/Domainmap/Module/System.php:134
Domainmap_Module_System->table_exists()
wp-content/plugins/domain-mapping/classes/Domainmap/Module/System.php:206

Domain mapping version 4.4.2.4 does not appear to use this query, and also showed markedly lower CPU usage.

The extra CPU load is actually high enough that I had to upgrade my server costing me hundreds of dollars per month... Since WPMUDEV is targeted towards multisite networks, I hope your developers will address this asap.