[boost] [uuid] uuid::create() is extremely slow

1 Jun 2007


      Andy,
You did a nice job speeding up the uuid::create(engine) function to 0.4 
seconds for 1 million UUIDs.  But now the uuid::create() function is 
extremely slow - 131 seconds for 1 million UUIDs (source code below).  Can 
you change it to use a static mt19937 engine?
Thanks,
Dave Jenkins

#include <boost/uuid.hpp>
#include <boost/progress.hpp>
#include <string>
int main(int, char*[])
{
    using namespace boost;
    int const N = 1000000;
//    mt19937 engine;
    timer t1;
    for (int i=0; i<N; i++)
        uuid::create();
//      uuid::create(engine);
    std::cout << "elapsed time: " << t1.elapsed() << '\n';
    return 0;
}