My second aswer:

要使用其他服务器，使用您的子域（比如媒体）并不容易。领域com这并不难，一旦我用它在我的价格比较网站与WP做。加快加载速度的主要方法是使用不同的域，而子域也很好，因为浏览器也会为它们打开新的连接。因此，请使用本教程：http://www.computingunleashed.com/host-images-in-sub-domain.html

服务器将是相同的，bat浏览器将创建新连接以加载图像，因此加载时间将更短（如果服务器不慢）。

将此粘贴到。HTACCESS文件：

Header unset ETag
FileETag None

# BEGIN Expire headers  
<ifModule mod_expires.c>  
    ExpiresActive On  
    ExpiresDefault "access plus 35 seconds"  
    ExpiresByType image/x-icon "access plus 2592000 seconds"  
    ExpiresByType image/jpeg "access plus 2592000 seconds"  
    ExpiresByType image/png "access plus 2592000 seconds"  
    ExpiresByType image/gif "access plus 2592000 seconds"  
    ExpiresByType application/x-shockwave-flash "access plus 2592000 seconds"  
    ExpiresByType text/css "access plus 604800 seconds"  
    ExpiresByType text/javascript "access plus 216000 seconds"  
    ExpiresByType application/javascript "access plus 216000 seconds"  
    ExpiresByType application/x-javascript "access plus 216000 seconds"  
    ExpiresByType text/html "access plus 600 seconds"  
    ExpiresByType application/xhtml+xml "access plus 600 seconds"  
</ifModule>  
# END Expire headers  

# BEGIN Cache-Control Headers  
<ifModule mod_headers.c>  
    <filesMatch "\\.(ico|jpe?g|png|gif|swf)$">  
        Header set Cache-Control "public"  
    </filesMatch>  
    <filesMatch "\\.(css)$">  
        Header set Cache-Control "public"  
    </filesMatch>  
    <filesMatch "\\.(js)$">  
        Header set Cache-Control "private"  
    </filesMatch>  
    <filesMatch "\\.(x?html?|php)$">  
        Header set Cache-Control "private, must-revalidate"  
    </filesMatch>  
</ifModule>  
# END Cache-Control Headers