Class BigIntegerPowCache
Provides caching of BigInteger powers for a given basis (from 3 to 10). Exponents that are bigger than the size of the cache are calculated each time they are requested.
Namespace: Singulink.Numerics
Assembly: Singulink.Numerics.BigIntegerExtensions.dll
Syntax
public sealed class BigIntegerPowCacheRemarks
Caching powers of 2 is not supported - use left/right shifting for a more memory and CPU efficient means of multiplying/dividing values by powers of 2.
You can safely get a cache instance without risking using large amounts of unnecessary memory in the event that the cache is not needed since it is empty when it is first created. The cache is populated on the first request for a value. Only 1 instance of a cache exists for a given basis.
When an exponent is requested that is larger than the current cache size, the cache is expanded by a minimum of 64 entries or as needed to ensure it includes the requested exponent. This involves creating a new array to hold the expanded cache, copying previously cached values over, and calculating all the rest of the missing values. Since caching results of a power function is already exponential in nature, a linear approach is used to expand the size of the cache instead of doubling its size.
Properties
| Name | Description |
|---|---|
| Basis | Gets the base of the exponent for this cache. |
| MaxSize | Gets the maximum cache size. The largest cached exponent is one less than this value. |
Methods
| Name | Description |
|---|---|
| Get(int) | Gets the cache's basis raised to the power of the given exponent value. |
| GetCache(int, int) | If there is an existing cache for the given basis then get it and increase its maximum size to meet the specified required max size, otherwise create a new cache with the given parameters. |