7.2 Cache
The Cache helper assists in caching entire layouts and views, saving time repetitively retrieving data. View Caching in Cake temporarily stores parsed layouts and views with the storage engine of choice. It should be noted that the Cache helper works quite differently than other helpers. It does not have methods that are directly called. Instead a view is marked with cache tags indicating which blocks of content should not be cached.
When a URL is requested, Cake checks to see if that request string has already been cached. If it has, the rest of the url dispatching process is skipped. Any nocache blocks are processed normally and the view is served. This creates a big savings in processing time for each request to a cached URL as minimal code is executed. If Cake doesn't find a cached view, or the cache has expired for the requested URL it continues to process the request normally.
