Site too slow when installing plugin

Hello everyone!

I installed Woocommerce Advanced Discounts, but after that my site got ridiculously slow, sometimes even giving connection time error exceeded.

When I disable and delete the plugin, the site works again normally.

I installed the P3 Plugin Performance Profiler, and he diagnosed that the Woocommerce Advanced Discounts plugin was consuming 36% of the site’s rendering!

And it really makes sense, because deleting the site gets fast, when installing the site gets slow, and hangs.

I have tried everything to optimize the site: optimize tables, install cache plugins, CDN, but nothing works.

I do not want to switch plugins because it does exactly what I need.

Has anyone had this problem with this plugin? Could you give me a hint on how to solve it?

Thank you very much in advance!