Magento – Best way to check if page is home page

What is the most reliable way to check if current page is the home page? I need to check that in a block class and in a helper class. Searching on forums, I've found two popular ways to do this:

Method 1

The first method is almost the same that worked also in Magento 1:

/**
 * @var \Magento\Framework\UrlInterface
 */
protected $urlInt;
public function getIsHomePage()
{
    return 
        $this->urlInt->getUrl('') == $this->urlInt->getUrl('*/*/*', ['_current'=>true, '_use_rewrite'=>true]);
}

Method 2

The second method is the one I've found on stackexchange, something like:

/**
 * @var \Magento\Framework\App\RequestInterface
 */
protected $request;
public function getIsHomePage()
{
    if ($this->request->getFullActionName() == 'cms_index_index')
    {
        return true;
    }
}

1. Which method is better? Will they both work correctly in all cases, or should I be careful in some specific cases?
2. Which method is faster? (I understand the difference will be very small)