WebKitCacheModel

Disable the cache completely, which substantially reduces memory usage. Useful for applications that only access a single local file, with no navigation to other pages. No remote resources will be cached.

Improve document load speed substantially by caching a very large number of resources and previously viewed content.

A cache model optimized for viewing a series of local files -- for example, a documentation viewer or a website designer. WebKit will cache a moderate number of resources.