--- /dev/null
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 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/>.
+
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file join_test.hpp
+ * Contains a join performance test.
+ */
+
+#ifndef PB_DS_JOIN_TEST_HPP
+#define PB_DS_JOIN_TEST_HPP
+
+#include <performance/time/timing_test_base.hpp>
+#include <ext/pb_ds/detail/type_utils.hpp>
+#include <performance/io/xml_formatter.hpp>
+#include <common_type/priority_queue/string_form.hpp>
+#include <iterator>
+
+namespace __gnu_pbds
+{
+ namespace test
+ {
+ namespace detail
+ {
+ template<typename It, typename Cntnr>
+ class double_push_functor
+ {
+ const It _M_begin;
+ const It _M_end;
+
+ public:
+ double_push_functor(It b, It e) : _M_begin(b), _M_end(e) { }
+
+ void
+ operator()(std::size_t resolution)
+ {
+ typedef typename Cntnr::const_reference const_reference;
+ for (std::size_t n = 0; n < resolution; ++n)
+ {
+ Cntnr c0;
+ Cntnr c1;
+ for (It it = _M_begin; it != _M_end; ++it)
+ {
+ c0.push(const_reference(it->first));
+ c1.push(const_reference(it->first));
+ }
+ }
+ }
+ };
+
+ template<typename It, typename Cntnr>
+ class double_push_join_functor
+ {
+ const It _M_begin;
+ const It _M_end;
+
+ public:
+ double_push_join_functor(It b, It e) : _M_begin(b), _M_end(e) { }
+
+ void
+ operator()(std::size_t resolution)
+ {
+ typedef typename Cntnr::const_reference const_reference;
+ for (std::size_t n = 0; n < resolution; ++n)
+ {
+ Cntnr c0;
+ Cntnr c1;
+ for (It it = _M_begin; it != _M_end; ++it)
+ {
+ c0.push(const_reference(it->first));
+ c1.push(const_reference(it->first));
+ }
+ c0.join(c1);
+ }
+ }
+ };
+ } // namespace detail
+
+ template<typename It>
+ class join_test : private __gnu_pbds::test::detail::timing_test_base
+ {
+ public:
+ join_test(It ins_b, size_t ins_vn, size_t ins_vs, size_t ins_vm)
+ : m_ins_b(ins_b), m_ins_vn(ins_vn), m_ins_vs(ins_vs), m_ins_vm(ins_vm)
+ { }
+
+ template<typename Cntnr>
+ void
+ operator()(Cntnr)
+ {
+ using __gnu_pbds::test::detail::double_push_functor;
+ using __gnu_pbds::test::detail::double_push_join_functor;
+ typedef __gnu_pbds::test::detail::timing_test_base base_type;
+ typedef double_push_functor<It, Cntnr> psh_fnct;
+ typedef double_push_join_functor<It, Cntnr> psh_jn_fnct;
+
+ typedef xml_result_set_performance_formatter formatter_type;
+ formatter_type res(string_form<Cntnr>::name(),
+ string_form<Cntnr>::desc());
+
+ for (size_t n = 0; m_ins_vn + n* m_ins_vs < m_ins_vm; ++n)
+ {
+ const size_t v = m_ins_vn + n * m_ins_vs;
+ It b = m_ins_b;
+ It e = m_ins_b;
+ std::advance(e, v);
+
+ psh_fnct double_push_fn(b, e);
+ const double dbl_psh_res = base_type::operator()(double_push_fn);
+ psh_jn_fnct dbl_psh_jn_fn(b, e);
+ const double dbl_psh_jn_res = base_type::operator()(dbl_psh_jn_fn);
+ const double min_res = double(timing_test_base::min_time_res());
+ const double effective_delta = std::max(dbl_psh_jn_res - dbl_psh_res, min_res);
+ res.add_res(v, effective_delta / v);
+ }
+ }
+
+ private:
+ join_test(const join_test&);
+
+ template<typename Cntnr>
+ void
+ join(Cntnr, It b, It e)
+ {
+ Cntnr cntnr;
+ typedef typename Cntnr::const_reference const_reference;
+ for (It it = b; it != e; ++it)
+ cntnr.join(const_reference(*it));
+ }
+
+ const It m_ins_b;
+ const size_t m_ins_vn;
+ const size_t m_ins_vs;
+ const size_t m_ins_vm;
+ };
+ } // namespace test
+} // namespace __gnu_pbds
+
+#endif
+
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