Just switch to using Disqus
Previously I was using Blogger default commenting system, and recently I decided to switch using Disqus. I did this in order to have more organized comments, and it seems Disqus protection from spammers are also much better.
Previously I remove all of the comments, a lot of comments are just spam, so this is a perfect moment to put up new platform for this blog commenting system.
No significant change in the loading speed of this blog, and I think this is the best solution I have now.