Google PageSpeed

Did you enable the .htaccess redirect? If you measure the speed of the http url with a php redirect, this is much slower than the .htaccess redirect. You can enable it in settings/ssl.

Additionally, you should test the https URL, as this is the new permanent URL. See for more info this article:
https://really-simple-ssl.com/knowledge-base/really-simple-ssl-make-site-slower/