From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; 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. --- .../performance/27_io/ofstream_insert_float.cc | 59 ++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 libstdc++-v3/testsuite/performance/27_io/ofstream_insert_float.cc (limited to 'libstdc++-v3/testsuite/performance/27_io/ofstream_insert_float.cc') 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 +// . + + +#include +#include +#include + +// 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; +} -- cgit v1.2.3