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, 82 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/performance/27_io/ifstream_extract_chars.cc b/libstdc++-v3/testsuite/performance/27_io/ifstream_extract_chars.cc
new file mode 100644
index 000000000..f12d49774
--- /dev/null
+++ b/libstdc++-v3/testsuite/performance/27_io/ifstream_extract_chars.cc
@@ -0,0 +1,82 @@
+// Copyright (C) 2005, 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 <cstdio>
+#include <fstream>
+#include <string>
+#include <testsuite_performance.h>
+
+// libstdc++/22515
+int main() 
+{
+  using namespace std;
+  using namespace __gnu_test;
+
+  time_counter time;
+  resource_counter resource;
+
+  const char filename[] = "tmp_perf_chars.txt";
+  const unsigned lines = 200000;
+  const unsigned line_length = 200;
+
+  char* line = new char[line_length + 2];
+
+  // Construct data.
+  {
+    memset(line, 'x', line_length);
+    line[line_length] = '\n';
+    line[line_length + 1] = '\0';
+    
+    ofstream out(filename);
+    for (unsigned i = 0; i < lines; ++i)
+      out << line;
+  }
+  
+  // operator>>(basic_istream<char>& __in, basic_string<char>& __str)
+  {
+    start_counters(time, resource);
+    for (int iter = 0; iter < 25; ++iter)
+      {
+	ifstream file(filename);
+	string string_line;
+	
+	while (file >> string_line);
+      }
+    stop_counters(time, resource);
+    report_performance(__FILE__, "string&", time, resource);
+    clear_counters(time, resource);
+  }
+  
+  // operator>>(basic_istream<char>& __in, char* __s)
+  {
+    start_counters(time, resource);
+    for (int iter = 0; iter < 25; ++iter)
+      {
+	ifstream file(filename);
+	
+	while (file >> line);
+      }
+    stop_counters(time, resource);
+    report_performance(__FILE__, "char*", time, resource);
+    clear_counters(time, resource);
+  }
+
+  delete[] line;
+  unlink(filename);
+  return 0;
+}