Unfortunately, even if the reason for the slowness is this plugin, I must say that this plugin is one of the main plugins of our community and can not be removed from us in any way, and users become heavily depended on it! 
We currently use 24 web workers. Our Discourse is installed on a VM with 24 CPU cores with 2 GHz processing power and 24 GB of RAM. Unfortunately, it is not possible to change the main server now, unless we have no other way to improve performance.
Do you think that in the current situation, increasing the number of web workers can help to improve performance?