My dear friends,
Comments are integral part of a healthy blog to understand audience requirements. However, it takes a lot of time in deleting each spam comment or dealing with false-positive.
In the age of Google Web Vital and GDPR, we need a solution that doesn’t hurt performance and privacy.
Just I have released Forget Spam Comment for the default commenting system of WordPres. 
It’s 3x lightweight (~217 bytes), GDPR compliant, secure than popular alternative Akimset which is paid for commercial sites but my plugin is free for everyone.
Would you mind giving a try?
- Install, Activate, and must clear the ‘Page cache’. (Caching plugin / Varnish / CDN / FastCGI)
Make a test comment and see if it works for your theme. I have done my well research to ensure it works with all popular themes. If you need any help, surely feel free to ask.
It was fun and interesting developing a plugin for the first time. If you are interested in learning how it works, consider watching attached YouTube video.
I would greatly appreciate if you could share this info with your friends who might be interested as well. 
Thanks & Regards,
Gulshan