diff --git a/benchmarks/Index/Index.cpp b/benchmarks/Index/Index.cpp
new file mode 100644
index 000000000..14bac99e6
--- /dev/null
+++ b/benchmarks/Index/Index.cpp
@@ -0,0 +1,92 @@
+#include <Core/Core.h>
+#include <set>
+
+using namespace Upp;
+
+CONSOLE_APP_MAIN
+{
+#ifdef _DEBUG
+	const int v_num = 10000;
+#else
+	const int v_num = 10;
+#endif
+
+	const int isize = 1000000;
+
+	{
+		Vector<Index<int> > v;
+		v.SetCount(v_num);
+		{
+			RTIMING("FindAdd v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].FindAdd(i);
+		}
+		{
+			RTIMING("UnlinkKey v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].UnlinkKey(i);
+		}
+		RTIMING("Sweep v_num outer");
+		const int jsize = v_num;
+		for (int j = 0; j < jsize; ++j)
+			v[j].Sweep();
+	}
+	{
+		Vector<Index<int> > v;
+		v.SetCount(v_num);
+		{
+			RTIMING("FindAdd v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].FindAdd(i);
+		}
+		{
+			RTIMING("UnlinkKey v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].UnlinkKey(i);
+		}
+		RTIMING("Sweep v_num inner");
+		const int jsize = v_num;
+		for (int j = 0; j < jsize; ++j)
+			v[j].Sweep();
+	}
+
+	{
+		std::set<int> *v = new std::set<int>[v_num];
+		{
+			RTIMING("insert v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].insert(i);
+		}
+	
+		{
+			RTIMING("erase v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].erase(i);
+		}
+		delete[] v;
+	}
+
+	{
+		std::set<int> *v = new std::set<int>[v_num];
+		{
+			RTIMING("insert v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].insert(i);
+		}
+	
+		{
+			RTIMING("erase v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].erase(i);
+		}
+		delete[] v;
+	}
+}
diff --git a/benchmarks/Index/Index.upp b/benchmarks/Index/Index.upp
new file mode 100644
index 000000000..b87f41358
--- /dev/null
+++ b/benchmarks/Index/Index.upp
@@ -0,0 +1,9 @@
+uses
+	Core;
+
+file
+	Index.cpp;
+
+mainconfig
+	"" = "";
+
diff --git a/benchmarks/Index2/Index.cpp b/benchmarks/Index2/Index.cpp
new file mode 100644
index 000000000..43db19604
--- /dev/null
+++ b/benchmarks/Index2/Index.cpp
@@ -0,0 +1,96 @@
+#include <Core/Core.h>
+#include <set>
+
+using namespace Upp;
+
+CONSOLE_APP_MAIN
+{
+#ifdef _DEBUG
+	const int v_num = 10000;
+#else
+	const int v_num = 100000;
+#endif
+
+	const int isize = 100;
+	
+	Vector<int> data;
+	for(int i = 0; i < isize; i++)
+		data.Add(Random());
+
+	{
+		Vector<Index<int> > v;
+		v.SetCount(v_num);
+		{
+			RTIMING("FindAdd v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].FindAdd(data[i]);
+		}
+		{
+			RTIMING("UnlinkKey v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].UnlinkKey(data[i]);
+		}
+		RTIMING("Sweep v_num outer");
+		const int jsize = v_num;
+		for (int j = 0; j < jsize; ++j)
+			v[j].Sweep();
+	}
+	{
+		Vector<Index<int> > v;
+		v.SetCount(v_num);
+		{
+			RTIMING("FindAdd v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].FindAdd(data[i]);
+		}
+		{
+			RTIMING("UnlinkKey v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].UnlinkKey(data[i]);
+		}
+		RTIMING("Sweep v_num inner");
+		const int jsize = v_num;
+		for (int j = 0; j < jsize; ++j)
+			v[j].Sweep();
+	}
+
+	{
+		std::set<int> *v = new std::set<int>[v_num];
+		{
+			RTIMING("insert v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].insert(data[i]);
+		}
+	
+		{
+			RTIMING("erase v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].erase(data[i]);
+		}
+		delete[] v;
+	}
+
+	{
+		std::set<int> *v = new std::set<int>[v_num];
+		{
+			RTIMING("insert v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].insert(i);
+		}
+	
+		{
+			RTIMING("erase v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].erase(i);
+		}
+		delete[] v;
+	}
+}
diff --git a/benchmarks/Index2/Index2.upp b/benchmarks/Index2/Index2.upp
new file mode 100644
index 000000000..b87f41358
--- /dev/null
+++ b/benchmarks/Index2/Index2.upp
@@ -0,0 +1,9 @@
+uses
+	Core;
+
+file
+	Index.cpp;
+
+mainconfig
+	"" = "";
+
diff --git a/benchmarks/Index3/Index.cpp b/benchmarks/Index3/Index.cpp
new file mode 100644
index 000000000..ab6097a74
--- /dev/null
+++ b/benchmarks/Index3/Index.cpp
@@ -0,0 +1,99 @@
+#include <Core/Core.h>
+#include <set>
+
+using namespace Upp;
+
+CONSOLE_APP_MAIN
+{
+#ifdef _DEBUG
+	const int v_num = 10000;
+#else
+	const int v_num = 100000;
+#endif
+
+	const int isize = 100;
+	
+	Vector<String> data;
+	for(int i = 0; i < isize; i++)
+		data.Add(AsString(Random()));
+
+	{
+		Vector<Index<String> > v;
+		v.SetCount(v_num);
+		{
+			RTIMING("FindAdd v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].FindAdd(data[i]);
+		}
+		return;
+		{
+			RTIMING("UnlinkKey v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].UnlinkKey(data[i]);
+		}
+		RTIMING("Sweep v_num outer");
+		const int jsize = v_num;
+		for (int j = 0; j < jsize; ++j)
+			v[j].Sweep();
+	}
+	{
+		Vector<Index<String> > v;
+		v.SetCount(v_num);
+		{
+			RTIMING("FindAdd v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j) {
+					RTIMING("2");
+					v[j].FindAdd(data[i]);
+				}
+		}
+		{
+			RTIMING("UnlinkKey v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].UnlinkKey(data[i]);
+		}
+		RTIMING("Sweep v_num inner");
+		const int jsize = v_num;
+		for (int j = 0; j < jsize; ++j)
+			v[j].Sweep();
+	}
+
+	{
+		std::set<String> *v = new std::set<String>[v_num];
+		{
+			RTIMING("insert v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].insert(data[i]);
+		}
+	
+		{
+			RTIMING("erase v_num outer");
+			for (int j = 0; j < v_num; ++j)
+				for (int i = 0; i < isize; ++i)
+					v[j].erase(data[i]);
+		}
+		delete[] v;
+	}
+
+	{
+		std::set<String> *v = new std::set<String>[v_num];
+		{
+			RTIMING("insert v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].insert(data[i]);
+		}
+	
+		{
+			RTIMING("erase v_num inner");
+			for (int i = 0; i < isize; ++i)
+				for (int j = 0; j < v_num; ++j)
+					v[j].erase(data[i]);
+		}
+		delete[] v;
+	}
+}
diff --git a/benchmarks/Index3/Index3.upp b/benchmarks/Index3/Index3.upp
new file mode 100644
index 000000000..b87f41358
--- /dev/null
+++ b/benchmarks/Index3/Index3.upp
@@ -0,0 +1,9 @@
+uses
+	Core;
+
+file
+	Index.cpp;
+
+mainconfig
+	"" = "";
+