On the client side, very time-consuming operations should run asynchronously so as to avoid freezing the browser. The best example is the operation of Ajax.

Every situation is an opportunity given to you by the universe. If you know how to make the most out of that situation, do it. It will be a wealth that lasts you a lifetime. If you missed out, gave up, or didn't even attempt to take advantage of the opportunity, the universe will set this chance aside for the next person, in a different time and place. But what's most important is that you lost precious time. Understand what you did wrong, and control the present. Then with proper restraint, if you can dance, dance. If you can sing, sing. If you can be wild, be wild. If you can be lively, be lively.