Class TimSorter

Sorter implementation based on the TimSort algorithm.

This implementation is especially good at sorting partially-sorted arrays and sorts small arrays with binary sort.

NOTE:There are a few differences with the original implementation:
  • The extra amount of memory to perform merges is configurable. This allows small merges to be very fast while large merges will be performed in-place (slightly slower). You can make sure that the fast merge routine will always be used by having maxTempSlots equal to half of the length of the slice of data to sort.
  • Only the fast merge routine can gallop (the one that doesn't run in-place) and it only gallops on the longest slice.

Note

This API is for internal purposes only and might change in incompatible ways in the next release.

Inheritance
object
Sorter
TimSorter
Inherited Members
Namespace: Lucene.Net.Util
Assembly: Lucene.Net.dll
Syntax
public abstract class TimSorter : Sorter

Constructors

TimSorter(int)

Create a new TimSorter.

Declaration
protected TimSorter(int maxTempSlots)
Parameters
Type Name Description
int maxTempSlots

The maximum amount of extra memory to run merges

Methods

CompareSaved(int, int)

Compare element i from the temporary storage with element j from the slice to sort, similarly to Compare(int, int).

Declaration
protected abstract int CompareSaved(int i, int j)
Parameters
Type Name Description
int i
int j
Returns
Type Description
int

Copy(int, int)

Copy data from slot src to slot dest>.

Declaration
protected abstract void Copy(int src, int dest)
Parameters
Type Name Description
int src
int dest

Restore(int, int)

Restore element j from the temporary storage into slot i.

Declaration
protected abstract void Restore(int i, int j)
Parameters
Type Name Description
int i
int j

Save(int, int)

Save all elements between slots i and i+len into the temporary storage.

Declaration
protected abstract void Save(int i, int len)
Parameters
Type Name Description
int i
int len

Sort(int, int)

Sort the slice which starts at from (inclusive) and ends at to (exclusive).

Declaration
public override void Sort(int from, int to)
Parameters
Type Name Description
int from
int to
Overrides