performance

Cache type

• Database cache : When you make several similar query, the database can cache the result in order to save
• APC : php cache : The php is not a compiled language, so it compile at real time. APC save the already compiled code, in order to save this compilation phase.
• Backend cache When the application need to build complex object by making multiple query to the database, a good practice is to cache the result in a database, or in memory (memcache).
• Rendered HTML cache The final state of a web page is html pages, generated by the backend language, this html version could be cached by reversed proxy like varnish or in static file system
• Browser cache Used to store static files likes files, css... Need to specify a validity range
• Local storage New html5 features that allow to store data in a structured form in the client browser