framework/log/Logger.php
public function getDbProfiling()
    {
        $timings = $this->getProfiling(['yii\db\Command::query', 'yii\db\Command::execute']);
        $count = count($timings);
        $time = 0;
        foreach ($timings as $timing) {
            $time += $timing['duration'];
        }

        return [$count, $time];
    }
public function getDbProfiling()
    {
        $timings = $this->getProfiling(['yii\db\Command::query', 'yii\db\Command::execute']);
        $count = count($timings);
        $time = 0;
        foreach ($timings as $timing) {
            $time += $timing['duration'];
        }

        return [$count, $time];
    }
Returns the statistical results of DB queries.
The results returned include the number of SQL statements executed and
the total time spent.
@return array the first element indicates the number of SQL statements executed,
and the second element the total time spent in SQL execution.