.htaccess para controlar o cache dos arquivos da aplicação. melhora significativamente Fonte : http://pastebin.com/eFihbb93 Original: Matheus Kramer

cache-control

#Força a utilizar Cache-Control e Expires header
<IfModule mod_headers.c>
  Header unset ETag
</IfModule>
FileETag None
<IfModule mod_expires.c>
 ExpiresActive on
 ExpiresDefault "access plus 1 month"
 ExpiresByType text/cache-manifest "access plus 0 seconds"
 # Html
 ExpiresByType text/html "access plus 0 seconds"
 # Data
 ExpiresByType text/xml "access plus 0 seconds"
 ExpiresByType application/xml "access plus 0 seconds"
 ExpiresByType application/json "access plus 0 seconds"
 # Feed
 ExpiresByType application/rss+xml "access plus 1 hour"
 ExpiresByType application/atom+xml "access plus 1 hour"
 # Favicon
 ExpiresByType image/x-icon "access plus 1 week"
 # Media: images, video, audio
 ExpiresByType image/gif "access plus 1 month"
 ExpiresByType image/png "access plus 1 month"
 ExpiresByType image/jpg "access plus 1 month"
 ExpiresByType image/jpeg "access plus 1 month"
 ExpiresByType video/ogg "access plus 1 month"
 ExpiresByType audio/ogg "access plus 1 month"
 ExpiresByType video/mp4 "access plus 1 month"
 ExpiresByType video/webm "access plus 1 month"
 # HTC files
 ExpiresByType text/x-component "access plus 1 month"
 # Webfonts
 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 / JS
 ExpiresByType text/css "access plus 1 year"
 ExpiresByType application/javascript "access plus 1 year"
 ExpiresByType application/x-javascript  "access plus 1 year"
</IfModule>
#Força o IE a sempre carregar utilizando a última versão disponível
<IfModule mod_headers.c>
  Header set X-UA-Compatible "IE=Edge,chrome=1"
  <FilesMatch "\.(js|css|gif|png|jpeg|pdf|xml|oga|ogg|m4a|ogv|mp4|m4v|webm|svg|svgz|eot|ttf|otf|woff|ico|webp|appcache|

manifest|htc|crx|oex|xpi|safariextz|vcf)$" >
    Header unset X-UA-Compatible
  </FilesMatch>
</IfModule>

<IfModule mod_headers.c>
  <FilesMatch "\.(js|css|xml|gz)$">
    Header append Vary: Accept-Encoding
  </FilesMatch>
</IfModule>