I have seen an article on Blogger and Cloudflare. where i can add custom domain for blogger with Cloudflare.
Will the speed of the website decrease when I do this setup? I would like to install an APP from Cloudflare.
Navigate to SSL/TLS section on Cloudflare dashboard. And select the Flexible mode for SSL settings on the Overview tab .
Forget about that article 
They clearly dont know what they are talking about.