Store Locator Plus® was recently updated to further improve the performance of the application. In addition the user experience for location categories has been updated, addressing shortcomings in the category legend rendering methodology.
After implementing security patches requested by the plugin management team over at WordPress.com, we noticed several administrative pages on our plugin as well as on our SaaS service were running slower than usual. After an extensive performance analysis of the underlying code, we were able to isolate the change and improve performance of that module by several orders of magnitude, saving up to 15 seconds per locator settings page request.
Time to execute the subquery improved from approximately 11 seconds to < 1 second. Memory consumption for that routine dropped from 5.4MB / request to 1MB / request.