src/benchmark/graph-bench.cc
changeset 1435 8e85e6bbefdf
parent 921 818510fa3d99
equal deleted inserted replaced
5:04276a4ce0ca -1:000000000000
     1 #include<lemon/list_graph.h>
       
     2 
       
     3 #include"bench_tools.h"
       
     4 
       
     5 using 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. 
       
    14 template <class Graph>
       
    15 void makeFullGraph(int n, int rat, int p)
       
    16 {
       
    17   GRAPH_TYPEDEF_FACTORY(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 
       
    45 int main()
       
    46 {
       
    47   lemon::Timer T;
       
    48   makeFullGraph<ListGraph>(nextPrim(1000),nextPrim(300),nextPrim(100));
       
    49   
       
    50   PrintTime("BIG",T);
       
    51   T.reset();
       
    52   makeFullGraph<ListGraph>(nextPrim(100),nextPrim(30000),nextPrim(150));
       
    53 
       
    54   PrintTime("SMALL",T);
       
    55 }