public function XHProfAggregator::average in XHProf 7

Same name and namespace in other branches

1. 6 XHProfLib/XHProfAggregator.php \XHProfAggregator::average()

Return value

array

File

XHProfLib/XHProfAggregator.php, line 17

Class

XHProfAggregator

Code

public function average() {
  $keys = array();
  foreach ($this->runs as $data) {
    $keys = $keys + array_keys($data);
  }
  $agg_run = array();
  $run_count = count($runs);
  foreach ($keys as $key) {
    $agg_key = array();

    // Check which runs have this parent_child function key, collect metrics if so.
    foreach ($runs as $data) {
      if (isset($data[$key])) {
        foreach ($data[$key] as $metric => $val) {
          $agg_key[$metric][] = $val;
        }
      }
    }

    // Average each metric for the key into the aggregated run.
    $agg_run[$key] = array();
    foreach ($agg_key as $metric => $vals) {
      $sd = self::sd($vals);
      $mean = array_sum($vals) / count($vals);
      $good_vals = array();
      if ($sd == 0) {
        $agg_run[$key][$metric] = array_sum($vals) / count($vals);
      }
      else {
        foreach ($vals as $v) {
          $diff = abs($mean - $v);
          if (abs($mean - $v) < $sd * 2) {
            $good_vals[] = $v;
          }
        }
        $agg_run[$key][$metric] = array_sum($good_vals) / count($good_vals);
      }
    }
  }
  return $agg_run;
}