#include <iostream>

#include "TFile.h"
#include "TTree.h"
#include "TCanvas.h"
#include "TStopwatch.h"


using namespace std;

int addone( int foo )
{

  return foo+1;

}

int icount;
TTree* buildtree( )
{
  TFile *f = new TFile("deleteme.root","RECREATE");
  TTree *t = new TTree("aTree","aTree");
  t->Branch("count",&icount,"count/I");
  for ( icount=0; icount!=200000; ++icount )
    {
      t->Fill();
    }

  return t;
}

void testit()
{
  TTree *t = buildtree();

  TStopwatch w;
  w.Start();
  cout << "start loop:" << endl;
  int sum=0;
  for ( int i=0; i!=200000; ++i )
    {
      sum += addone(i);
    }
  w.Stop();
  cout << "done: loop1; " << sum << endl;
  w.Print();


  new TCanvas();
  w.Start();
  t->Draw("count");
  w.Stop();
  cerr << "done: Draw 1" << endl;  
  w.Print();


  new TCanvas();
  w.Start();
  t->Draw("addone(count)");
  w.Stop();
  cerr << "done: Draw 2" << endl;
  w.Print();
}