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// -*- C++ -*-
// Copyright (C) 2005-2021 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
// 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
// <>.
// 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 hash_random_int_erase_mem_usage_test.cpp
* Contains test for erasing random integers.
#include <ext/typelist.h>
#include <testsuite_allocator.h>
#include <performance/io/xml_formatter.hpp>
#include <io/verified_cmd_line_input.hpp>
#include <testsuite_rng.h>
#include <common_type/assoc/common_type.hpp>
#include <performance/assoc/mem_usage/erase_test.hpp>
#include <iostream>
#include <vector>
#include <functional>
struct int_hash : public std::unary_function<int, int>
inline int
operator()(int i) const
{ return i; }
main(int argc, char* a_p_argv[])
using namespace __gnu_pbds::test;
size_t vn = 200;
size_t vs = 200;
size_t vm = 2100;
xml_test_performance_formatter fmt("Size", "Memory (bytes)");
typedef std::vector<int> vec_t;
vec_t a_v(vm);
twister_rand_gen g;
for (size_t i = 0; i < vm; ++i)
a_v[i] = static_cast<int>(g.get_unsigned_long());
vec_t::const_iterator b = a_v.begin();
erase_test<vec_t::const_iterator> tst(b, vn, vs, vm);
typedef __gnu_test::tracker_allocator<char> alloc_t;
typedef hash_common_types<int, __gnu_pbds::null_type, int_hash, std::equal_to<int>, alloc_t>::performance_tl tl_t;
tl_t tl;
__gnu_cxx::typelist::apply(tst, tl);
typedef native_hash_set<int, 8, int_hash, std::equal_to<int>, std::less<int>, alloc_t> native_t;
catch (...)
std::cerr << "Test failed" << std::endl;
return -1;
return 0;
using namespace std;
cerr << "usage: hash_random_int_erase_if_test <vn> <vs> <vm>"
<< endl << endl;
cerr << "This test checks the performance of various associative containers "
"using their erase method. " << endl;
cerr << "Specifically, it does the following:" << endl;
cerr << "* Creates a vector of random integers " << endl;
cerr << "* Inserts the elements into the container" << endl;
cerr << "* Erases all the elements, except one, from the constainer"
<< endl << endl;
cerr << "vn = minimum size of the vector" << endl;
cerr << "vs = step size of the vector" << endl;
cerr << "vm = maximum size of the vector" << endl;