Bulkinsert on RavenDB 2.5

UglyTest.cs

void Main()
{
	var store = new EmbeddableDocumentStore();
	store.RunInMemory = true;
	using (store.Initialize())
	{
		var index = new DocumentIndex();
		index.Execute(store);
		
		var docs = Enumerable.Range(0, 100000).Select(i => new SomeClass { Value = "Doc: " + i}).ToList();
		var counter = 0;
		
		using (var blk = store.BulkInsert())
		{
			blk.Report += (s) =>
			{
				counter++;
				Console.WriteLine(counter.ToString("000") + ": " + s);
			};
			
			docs.ForEach(d => blk.Store(d));
		}
		
		SpinWait.SpinUntil(() => store.DatabaseCommands.GetStatistics().StaleIndexes.Length == 0, TimeSpan.FromSeconds(20));
		
		using (var session = store.OpenSession())
		{
			var documentsByCollection = session.Query<DocumentIndex.Result, DocumentIndex>().ToArray();
			foreach (var dbc in documentsByCollection)
			{
				Console.WriteLine($"{dbc.Tag}:\t{dbc.Sum}");
			}
		}
	}
}

public class SomeClass
{
	public string Id { get; set; }
	public string Value { get; set; }
}

public class DocumentIndex : AbstractIndexCreationTask<SomeClass, DocumentIndex.Result>
{

	public class Result
	{
		public string Tag { get; set;}
		public int Sum { get; set;}
	}

	public DocumentIndex()
	{
		Map = docs => from doc in docs
					  let metadata = MetadataFor(doc)
					  select new Result { Tag = metadata["Raven-Entity-Name"].ToString(),  Sum = 1};

		Reduce = results => from result in results 
							group result by result.Tag into g 
							select new Result { Tag = g.Key, Sum = g.Sum(x => x.Sum)};
	}
}