Out of memory (allocated 2097152) (tried to allocate 90112 bytes)

        if ($response instanceof Redirect) {
            //TODO 记录
        } else {
            $output = $trace->output($response, $this->app['log']->getLog());
            if (is_string($output)) {
                // trace调试信息注入
                $pos = strripos($content, '</body>');
                if (false !== $pos) {
                    $content = substr($content, 0, $pos) . $output . substr($content, $pos);
                } else {
                    $content = $content . $output;
                }
            }
        }
    }

    public function __debugInfo()
    {