Magento 2 - Request Flow / Bootstrap - Magento\Framework\App\Bootstrap::run()

Magento\Framework\App\Bootstrap.php

<?php

...

    /**
     * Runs an application
     *
     * @param \Magento\Framework\AppInterface $application
     * @return void
     */
    public function run(AppInterface $application)
    {
        try {
            try {
                \Magento\Framework\Profiler::start('magento');
                $this->initErrorHandler();
                $this->initObjectManager();
                $this->assertMaintenance();
                $this->assertInstalled();
                $response = $application->launch();
                $response->sendResponse();
                \Magento\Framework\Profiler::stop('magento');
            } catch (\Exception $e) {
                \Magento\Framework\Profiler::stop('magento');
                if (!$application->catchException($this, $e)) {
                    throw $e;
                }
            }
        } catch (\Exception $e) {
            $this->terminate($e);
        }
    }
    
...