In this fiercely competitive digital age, especially in search engine ranking page loading times are a sine qua non condition for users as well as an affect upon site rankings. Here are some tools that come highly recommended if you want to improve web page performance:
Google Light House
A comprehensive open source tool, Google Light House provides information on performance metrics, compliance of web pages with accessibility guidelines and so on. But it does more than simply tell you what is wrong with your site or how it can be improved; for example, by changing CSS which of course may have repercussions beyond the original problem if not done carefully. It can even pinpoint exactly the factors slowing your web site down stops