COIN-OR::LEMON - Graph Library

source: lemon-0.x/benchmark/graph-bench.cc @ 1847:7cbc12e42482

Last change on this file since 1847:7cbc12e42482 was 1847:7cbc12e42482, checked in by Alpar Juttner, 14 years ago
  • Changed and improved Timer interface
    • several new member functions
    • reset() -> restart() renaming
    • TimeReport?: a Timer that prints a report on destruction.
  • counter.h: a tool to measure the number of streps of algorithms.
  • New documentation module for time measuring and counting.
File size: 1.4 KB
Line 
1#include<lemon/list_graph.h>
2
3#include"bench_tools.h"
4
5using namespace lemon;
6
7///Makes a full graph by adding and deleting a lot of edges;
8
9///\param n Number of nodes.
10///\param rat The funcion will make \f$rat\timesn^2\f$ edge addition and
11///\f$(rat-1)\timesn^2\f$ deletion.
12///\param p Tuning parameters.
13///\warning \c rat, \c p, and \c n must be pairwise relative primes.
14template <class Graph>
15void makeFullGraph(int n, int rat, int p)
16{
17  GRAPH_TYPEDEFS(typename Graph);
18
19  Graph G;
20 
21  //  Node nodes[n];
22  std::vector<Node> nodes(n);
23  for(int i=0;i<n;i++) nodes[i]=G.addNode();
24 
25  //Edge equ[rat];
26  std::vector<Edge> equ(rat);
27 
28  long long int count;
29 
30  for(count=0;count<rat;count++) {
31    equ[count%rat]=G.addEdge(nodes[(count*p)%n],nodes[(count*p/n)%n]);
32  }
33  for(;(count%rat)||((count*p)%n)||((count*p/n)%n);count++) {
34    //    if(!(count%1000000)) fprintf(stderr,"%d\r",count);
35    if(count%rat) G.erase(equ[count%rat]);
36    equ[count%rat]=G.addEdge(nodes[(count*p)%n],nodes[(count*p/n)%n]);
37  }
38//   std::cout << "Added " << count
39//          << " ( " << n << "^2 * " << rat << " ) edges\n";
40
41
42  //  for(int i=0;1;i++) ;
43}
44
45int main()
46{
47  lemon::Timer T;
48  makeFullGraph<ListGraph>(nextPrim(1000),nextPrim(300),nextPrim(100));
49 
50  PrintTime("BIG",T);
51  T.restart();
52  makeFullGraph<ListGraph>(nextPrim(100),nextPrim(30000),nextPrim(150));
53
54  PrintTime("SMALL",T);
55}
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