SSL slow down

I am using cheap Rapid SSL for my site

does this make slow down moving http to https ?

it take 3-4 second when it go to secure https page

is it sever problem or cheap ssl ?

any recommandation for ssl ?

The certificate should have nothing to do with performance after that 1st request. And even for the 1st request, the impact of a deeply-chained SSL certificate versus one closer to the 'root' is negligible.