Effective and doesn’t slow down my site

I started getting far too many spam comments. The price you pay as a site’s popularity grows. I wanted something to slow the spammers but did not want a plugin that bloats my site and slows it down. Tested this simple plugin and…

Spam comments came almost to a complete halt. My pages load just as fast but I have a cdn and cache plugin. I did not want a heavy plugin that was contacting outside databases and slowing down my site and possibly negatively effecting serp results because of longer load times. This plugin works. It’s effective. It does not slow my site at all according to the waterfall at gtmetrix.com. People leave just as many real comments as before.