_PROFILING FOR PERFORMANCE_
by Joseph Newcomer


[LISTING ONE]

     {
      float sum;                // sum of values
      float sum2;               // sum-of-squares
      float var;                // variance
#define NUM_RUNS 10             // choose a number
      struct {float v;
              int count;
             } runs[NUM_RUNS];  // run table
      int n_run = 0;    // current run ...