Ankit Dangi

Hey, alexnick05
What I would recommend you to use some CDN, they will optimize your site too far, there are some free CDNs like Cloudflare etc.
And for the question do I need script optimizer, it depends on the site, if your site is taking too much time to load then you should first see the gtmetrix score or Pingdom etc. to test the site. Many times script optimizer just smash some part of the website.

Hope my answer will going to help you.

Although, it is not recommended, here are the steps which might work for you.

1. You need to create a subdomain and configure its DNS settings.
2. Now, you need to migrate all the media to subdomain (“/wp-content/uploads/”) folder. (You can use FTP for this task.)
3. Now the important task to log in to PHPMyAdmin and change the upload folder under wp-options table of the database.

upload_path————-directory root for your subdomain
upload_url_path———actual URL path for your subdomain

For example:

upload_path———- /home/server_root/publich_html/img
upload_url_path—— http://media.yourdomain.com

4. If your website already has some images than you need to change there live URLs. to do this you need to run this command in phpmyadmin command tab.
UPDATE wp_posts SET post_content = REPLACE(post_content,'URL of current media folder','URL of new media folder')

Here :
URL of current media folder – http://www.youtdomain.com/wp-content/uploads
URL of new media folder – http://media.domain.com

5. Now, you can remove the old upload folder by deleting it from ftp.

6. Now you also need to change the URL from searching index and to do this you need to redirect the URL in the htaccess file.

RewriteCond %{HTTP_HOST} ^yourdomain\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.yourdomain\.com$
RewriteRule ^wp\-content\/uploads\/?(.*)$ "http\:\/\/subdomain\.yourdomain\.com\/$1" [R=301,L]

Follow these above steps and your media folder will be moved successfully.