Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / testsuite / performance / 27_io / stringbuf_overflow.cc

diff --git a/libstdc++-v3/testsuite/performance/27_io/stringbuf_overflow.cc b/libstdc++-v3/testsuite/performance/27_io/stringbuf_overflow.cc
new file mode 100644 (file)
index 0000000..86eb7d1
--- /dev/null
+++ b/libstdc++-v3/testsuite/performance/27_io/stringbuf_overflow.cc
@@ -0,0 +1,51 @@
+// Copyright (C) 2004, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+
+#include <sstream>
+#include <testsuite_performance.h>
+
+// libstdc++/16401 ostringstream in gcc 3.4.x very slow for big data
+void test01()
+{
+  using namespace std;
+  using namespace __gnu_test;
+
+  time_counter time;
+  resource_counter resource;
+
+  for(unsigned n = 10000; n <= 10000000; n *= 10)
+    {
+      ostringstream oss;
+      oss << "size = " << n; 
+
+      ostringstream str;
+      start_counters(time, resource);  
+      for(unsigned i = 0; i < n; ++i)
+       str << 'a';
+      stop_counters(time, resource);
+
+      report_performance(__FILE__, oss.str(), time, resource);
+      clear_counters(time, resource);
+    }
+}
+
+int main()
+{
+  test01();
+  return 0;
+}