Cache Optimisation

Cache Control Headers

  • Cache Control
  • Last-Modified/If-Modified-Since
  • Etag

Example for Modifying Cache-control

# 1 Month for most static assets
<filesMatch ".(css|jpg|jpeg|png|gif|js|ico)$">
Header set Cache-Control "max-age=2592000, public"
</filesMatch>

Server Site Cache Optimisation

In-memory data stores

  • Memcache
  • APC
  • Redis

Browser Cache

EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
## EXPIRES CACHING ##

Other types of Cache Optimisation

  • Static Page Cache Optimisation
  • Object Cache
  • SQL Queries Cache