ServiceDesk Plus behind Reverse Proxy

Hello all. We are testing the deployment of putting our service desk behind a remote proxy; however, when access the site through the proxy it is very slow to load. Has anyone had this issue before? We are using Nginx as the reverse proxy. I've included a copy of the configuration I'm using on Nginx in case anyone has any suggestions as to changes I can make to help speed up the loading time. Thanks.

server {
                listen 443;
                server_name website;

                ssl on;
                keepalive_timeout 70;
                ssl_session_cache shared:SSL:10m;
                ssl_session_timeout 10m;
                add_header Strict-Transport-Security "max-age=31536000; includeSubdomains";
                ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
                ssl_ciphers EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH:EDH+aRSA:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS:!RC4;

                location / {
                        proxy_set_header        Host            $host;
                        proxy_set_header        X-Real-IP       $remote_addr;
                        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

                        proxy_http_version 1.1;
                        proxy_set_header        Upgrade $http_upgrade;
                        proxy_set_header        Connection "upgrade";

                        proxy_pass              https://website
                }