#include <petscvec.h>
#include <petsctime.h>

#undef __FUNCT__
#define __FUNCT__ "main"
int main(int argc,char **argv)
{
  Vec            x;
  PetscReal      norm;
  PetscLogDouble t1,t2;
  int            ierr,n = 10000;

  PetscInitialize(&argc,&argv,0,0);
  ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr);

  ierr = VecCreate(PETSC_COMM_SELF,&x);CHKERRQ(ierr);
  ierr = VecSetSizes(x,n,n);CHKERRQ(ierr);
  ierr = VecSetFromOptions(x);CHKERRQ(ierr);

  PetscPreLoadBegin(PETSC_TRUE,"VecNorm");
  ierr = PetscTime(&t1);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  PetscPreLoadEnd();
  ierr = PetscTime(&t2);CHKERRQ(ierr);


  fprintf(stdout,"%s : \n","VecNorm");
  fprintf(stdout," Time %g\n",t2-t1);

  ierr = PetscFinalize();
  PetscFunctionReturn(0);
}