Настройка сжатия через htaccess
<IfModule mod_expires.c>
ExpiresActive on
ExpiresDefault "access plus 1 month"
# cache.appcache needs re-requests in FF 3.6 (thanks Remy ~Introducing HTML5)
ExpiresByType text/cache-manifest "access plus 0 seconds"
# html
ExpiresByType text/html "access plus 0 seconds"
# XML
ExpiresByType text/xml "access plus 0 seconds"
ExpiresByType application/xml "access plus 0 seconds"
# RSS
ExpiresByType application/rss+xml "access plus 1 hour"
# Favicon
ExpiresByType image/x-icon "access plus 1 week"
# Картинки
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/jpg "access plus 1 month"
# HTC файлы (например css3pie)
ExpiresByType text/x-component "access plus 1 month"
# Нестандартные шрифты сайта
ExpiresByType application/x-font-ttf "access plus 1 month"
ExpiresByType font/opentype "access plus 1 month"
ExpiresByType application/x-font-woff "access plus 1 month"
ExpiresByType image/svg+xml "access plus 1 month"
ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
# CSS и javascript
ExpiresByType text/css "access plus 1 year"
ExpiresByType application/javascript "access plus 1 year"
</IfModule>
Но судя по данным Page Speed сжатие не работает (см скрин).
http://storage7.static.itmages.com/i/13/0114/h_1358166987_8613444_803bb64a3f.png
P.S.
В самом движке сжатие так же включено
Источник:dle-faq.pro, DLE