Solve the slowness of Back Office

The reason of causing BO slowness is due to the API calls to prestashop's addon marketplace. When the API communication between your site and prestashop is not smooth, your BO will become very slow as well. Below is workaround solution to improve that situation.

yourapplicationfolder/classes/Tools.php (PS16 & PS17 or above)   

yourapplicationfolder/src/Adapter/Addons/AddonsDataProvider.php

search the below  

protected static $is_addons_up = true   --->    protected static $is_addons_up = false;

Tools.php (line 3934)

AddonsDataProvider.php (line 62)