[Domain Mapping] Query monitor plugins shows Domain Mapping is generating a slow query

The query SHOW TABLES, as this thread shows (https://wordpress.org/support/topic/query-monitor-reports-slow-query-on-wpmudev-domain-mapping-plugin/) is supposed to show all tables in the database, and that is generating a slow query according to Query Monitor plugin. Is that really necessary? It seems to be really slowing down the site. Could not we narrow that query to improve the server speed?

Thank you very much!