Caching
When some of your application function takes too long to compute, the useful technique to consider is caching. Caching is nothing but saving a return value for future reference. The result of a function or method that is expensive to run can be cached as long as:
The function is deterministic and the results have the same value every time, given the same input
The return value of the function continues to be useful and valid for some period of time (nondeterministic)
In other words, a deterministic function always returns the same result for the same set of arguments, whereas a nondeterministic one returns results that may vary in time. Such an approach usually greatly reduces the time of computation and allows you to save a lot of computer resources.
The most important requirement for any caching solution is to have a storage that allows you to retrieve saved values significantly faster than it takes to calculate them. Good candidates for caching are usually:
Results from callables that...
