obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 59 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/performance/27_io/ofstream_insert_float.cc b/libstdc++-v3/testsuite/performance/27_io/ofstream_insert_float.cc
new file mode 100644
index 000000000..203550db1
--- /dev/null
+++ b/libstdc++-v3/testsuite/performance/27_io/ofstream_insert_float.cc
@@ -0,0 +1,59 @@
+// Copyright (C) 2003, 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 <fstream>
+#include <sstream>
+#include <testsuite_performance.h>
+
+// Based on libstdc++/8761 poor fstream performance (converted to float)
+void test_insertion(int p = 6)
+{
+  using namespace std;
+  using namespace __gnu_test;
+
+  const char* filename = "tmp_perf_float.txt";
+  const int iterations = 10000000;
+
+  ostringstream oss;
+  oss << "precision " << p;
+
+  {
+    time_counter time;
+    resource_counter resource;
+
+    ofstream out(filename);
+    out.precision(p);
+    start_counters(time, resource);
+    for (int i = 0; i < iterations; ++i)
+      {
+	float f = i * 3.14159265358979323846;
+	out << f << '\n';
+      }
+    stop_counters(time, resource);
+    report_performance(__FILE__, oss.str(), time, resource);
+  }
+
+  unlink(filename);
+};
+
+int main()
+{
+  test_insertion(6);
+  test_insertion(12);
+  return 0;
+}