added high performance bdecoder code

test/test_bdecode_performance.cpp

@@ -0,0 +1,27 @@
+#include "libtorrent/lazy_entry.hpp"
+#include <boost/lexical_cast.hpp>
+#include <iostream>
+
+#include "test.hpp"
+#include "libtorrent/time.hpp"
+
+using namespace libtorrent;
+
+int test_main()
+{
+	using namespace libtorrent;
+
+	ptime start(time_now());
+
+	for (int i = 0; i < 1000000; ++i)
+	{
+		char b[] = "d1:ai12453e1:b3:aaa1:c3:bbbe";
+		lazy_entry e;
+		int ret = lazy_bdecode(b, b + sizeof(b)-1, e);
+	}
+	ptime stop(time_now());
+
+	std::cout << "done in " << total_milliseconds(stop - start) / 1000. << " seconds per million message" << std::endl;
+	return 0;
+}
+