Definition: '.ccache.conf' refers to a configuration file used in .NET framework that manages the caching strategy for performance testing and debugging tools. It's crucial for optimizing code execution by keeping the most frequently used parts of a program cached, thus reducing memory usage and improving the application's responsiveness. The definition varies based on the context but generally involves managing cache sizes, caches being "cachable" (cache can be accessed using the .NET Framework), caching configurations like 'max_cache_size', 'cache_lifetime', etc., for different resources.