Enable sql profiling for Magento2

sql_profiling.php

<?php
/**
 * Enable sql profiling for each page.
 *
 * Put code to index file in two parts
*/

// place it BEFORE application run
$profiler =  \Magento\Framework\App\ObjectManager::getInstance()
    ->get('Magento\Framework\App\ResourceConnection')
    ->getConnection('read')
    ->getProfiler()
    ->setEnabled(true);

$bootstrap->run($app);

// Place After application run

if (!isset($_SERVER['HTTP_X_REQUESTED_WITH'])) {
    /* @var \Magento\Framework\App\Resource $adapter */
    $adapter =  \Magento\Framework\App\ObjectManager::getInstance()
        ->get('Magento\Framework\App\ResourceConnection');
    // composer.phar  require "jdorn/sql-formatter:1.3.*@dev"
    // require_once '/home/user/.composer/vendor/jdorn/sql-formatter/lib/SqlFormatter.php';
    /* @var Zend_Db_Profiler $profiler */
    $profiler = $adapter->getConnection('read')->getProfiler();
    $queryPull = [];
    if ($profiler->getEnabled()) {
        echo "<table cellpadding='0' cellspacing='0' border='0'>";
        echo '<tr><th>', $profiler->getTotalElapsedSecs(), ' s ', '</th><th>', $profiler->getTotalNumQueries(), 'queries', '</th><th>', microtime(1) - $_SERVER['REQUEST_TIME_FLOAT'], '</th></tr>';
        foreach ($profiler->getQueryProfiles() as $query) {
            $queryTime = 1000 * $query->getElapsedSecs();
            $rowStyle = $queryTime > 1 ? 'color: red'  : '';
            $hash = md5($query->getQuery());
            if (!isset($queryPull[$hash])) {
                $queryPull[$hash] = 1;
            } else {
                $queryPull[$hash] += 1;
            }
            /** @var Zend_Db_Profiler_Query $query */
            echo '<tr style="'. $rowStyle . '">';
            echo '<td>', number_format($queryTime, 2), 'ms', '</td>';
            echo '<td><span style="color:grey; size: 8px">', $hash , '</span>  ' , $query->getQuery(), '</td>';
            echo '</tr>';
        }

        $blackList = array_map('md5', ['begin', 'commit']);
        $queryPull = array_filter($queryPull, function ($v, $k) use ($blackList) {
            return $v > 1 && !in_array($k, $blackList);
        }, ARRAY_FILTER_USE_BOTH);
        asort($queryPull);

        echo '<pre> Called more than once';
        print_r($queryPull);
    }
}