/// <summary>
/// Possibly prunes the cache to remove some of the least recently accessed nodes.
/// </summary>
/// <param name="store"></param>
public void PossiblyPruneCache(MCTSNodeStore store)
{
if (numCachePrunesInProgress == 0 && nodeCache.Count > MaxCacheSize)
{
// Reduce to 80% of prior size
Task.Run(() =>
{
//using (new TimingBlock("Prune"))
{
Interlocked.Increment(ref numCachePrunesInProgress);
DictionaryUtils.PruneDictionary(nodeCache, a => a.LastAccessedSequenceCounter,
(MaxCacheSize * 8) / 10);
Interlocked.Decrement(ref numCachePrunesInProgress);
};
});
}
}