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Speed Up That Site! A guide to caching plugins
Peter Baylies
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My site is slow!
• Why is my site slow? – I have no idea.
• What could it be? – HosEng – Theme – Plugins – Server – Gremlins
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Can I improve this?
• Sure! – Install a caching plugin
• What is that? – Let me Google that for you
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Cache /kaSH/ (verb)
gerund or present parEciple: caching 1. store away in hiding or for future use. COMPUTING store (data) in a cache memory. COMPUTING provide (hardware) with a cache memory
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Analogies…
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Analogies – it’s like…
• Squirrels – Stockpile for winter, you might need it then!
• Going to the store – Stock up on groceries!
• Pancakes – Make your own pancake mix, save Eme later!
• Recipes
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Understanding the Environment
• “LAMP” Environment – Linux – Apache – MySQL – PHP
• and… WordPress!
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Major Caching Plugins
• WP Super Cache – Pro: Does page caching well – Pro: Easy to set up – Con: Doesn’t have an object cache
• W3 Total Cache – Pro: comprehensive caching plugin – Pro: Has a lot of opEons – Con: Has a lot of opEons
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Ok But What Is It Really?
• Page caching – save the page for later • Object caching – save a result for later • Database caching – save a query for later • Browser caching – ask the user to save it • CDN – get another server to help you
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Avoiding Extra Work
• Page caching – avoiding MySQL and PHP • Object caching – avoiding MySQL (and PHP?) • Database caching – avoiding MySQL • Browser caching – avoiding Apache • CDN – avoiding your server enErely
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Awesome! What else?
• Caching backends – memcached – APC
• Caching frontends – Varnish
• WordPress features – Transients – Drop-‐ins
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QuesEons?
• Thank you! • Further Reading:
– hap://tollmanz.com/core-‐caching-‐concepts-‐in-‐wordpress/ – hap://codex.wordpress.org/WordPress_OpEmizaEon/Caching
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