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...
