#concrete5 Visualize rendering time of each blocks with DebugBar

app.php

<?php
/**
 * First, install the debug bar package. @link: https://github.com/concrete5cojp/concrete5_debugbar
 * Then, add these code in your application/bootstrap/app.php
 */
if ($app->isInstalled()) {
    $director = $app->make(\Symfony\Component\EventDispatcher\EventDispatcherInterface::class);
    $debugBar = $app->make(\Concrete\Core\Package\PackageService::class)->getByHandle('concrete5_debugbar');
    if (is_object($debugBar) && $debugBar->isPackageInstalled()) {
        $director->addListener('on_block_load', static function ($event) use ($app) {
            $bID = $event->getArgument('bID');
            $btHandle = $event->getArgument('btHandle');
            $app->make('debugbar/time')->startMeasure(sprintf('block_%d', $bID), sprintf('Rendering %s block (bID: %d)', $btHandle, $bID));
        });
        $director->addListener('on_block_output', static function ($event) use ($app) {
            /** @var \Concrete\Core\Block\Block $b */
            $b = $event->getBlock();
            $bID = $b->getBlockID();
            $app->make('debugbar/time')->stopMeasure(sprintf('block_%d', $bID), [
                'arHandle' => $b->getAreaHandle(),
                'cacheBlockOutput' => $b->cacheBlockOutput(),
            ]);
        });
    }
}