benchmark/swap_bipartite_bench.cc
author alpar
Thu, 07 Sep 2006 13:34:14 +0000
changeset 2208 37b5c870a953
parent 2207 75a29ac69c19
child 2232 ae8562537502
permissions -rw-r--r--
Revert an unintentional commit in r2933
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#include <cstdlib>
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#include <iostream>
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#include <sstream>
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#include <lemon/smart_graph.h>
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#include <lemon/bpugraph_adaptor.h>
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#include <lemon/bipartite_matching.h>
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#include <lemon/graph_utils.h>
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#include <lemon/xy.h>
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#include <lemon/graph_to_eps.h>
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#include <lemon/time_measure.h>
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using namespace std;
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using namespace lemon;
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typedef SmartBpUGraph Graph;
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BPUGRAPH_TYPEDEFS(Graph);
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int _urandom_init() {
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  int seed = time(0);
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  srand(seed);
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  return seed;
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}
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int urandom(int n) {
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  static int seed = _urandom_init();
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  ignore_unused_variable_warning(seed);
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  return (int)(rand() / (1.0 + RAND_MAX) * n);
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}
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int main() {
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  for (int k = 1; k < 100; ++k) {
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    int n = k * 100;
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    int m = (100 - k) * 100;
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    int e = 20000;
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    int s = 100;
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    Timer nt(false), st(false);
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    for (int i = 0; i < s; ++i) {
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      Graph graph;
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      vector<Node> aNodes;
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      vector<Node> bNodes;  
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      for (int i = 0; i < n; ++i) {
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        Node node = graph.addANode();
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        aNodes.push_back(node);
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      }
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      for (int i = 0; i < m; ++i) {
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        Node node = graph.addBNode();
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        bNodes.push_back(node);
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      }
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      for (int i = 0; i < e; ++i) {
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        Node aNode = aNodes[urandom(n)];
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        Node bNode = bNodes[urandom(m)];
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        graph.addEdge(aNode, bNode);
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      }
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      {
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        MaxBipartiteMatching<Graph> bpmatch(graph);
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        nt.start();
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        bpmatch.init();
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        bpmatch.start();
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        nt.stop();
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      }
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      {
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        typedef SwapBpUGraphAdaptor<Graph> SGraph;
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        SGraph sgraph(graph);
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        MaxBipartiteMatching<SGraph> bpmatch(sgraph);
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        st.start();
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        bpmatch.init();
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        bpmatch.start();
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        st.stop();
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      }
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    }
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    cout << k * 100 << ' ' << nt.realTime() << ' ' << st.realTime() << endl;
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  }
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  return 0;
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}