Page caching doesn’t work for everyone! Sites that handle a large number logged-in users like Membership sites, Multisite networks, BuddyPress sites, or bbPress forums need special treatment to scale effectively. I’ll share my experience in building and managing large Multisite networks to give tips and tricks to speeding up your dynamic websites and coding for scale.
10. Speeding Up PHP
• Use NGINX instead of Apache
• In Multisite use a CDN or Varnish
• Move Session storage to RAM
• Upgrade PHP to 5.5 or 5.6
• Enable and configure OPcache
• Make sure code base fits in cache size:
• opcache.memory_consumption
• opcache.max_accelerated_files
• Increase revalidation frequency:
• opcache.revalidate_freq