Why CSS selector is faster than xpath?

Related questions

1. What do you mean by CSS selectors?
2. Which is better XPath or CSS?
3. Is CSS faster than xpath?
4. What does * mean in CSS?
5. What is CSS ID selector?
6. Is xpath slower than CSS?
7. What is a CSS path?
8. Which is method is used to get the attribute value?
9. What are the CSS selectors?
10. What is Xpath in HTML?

Tags

1. #advantage
2. #native
3. #promotes
4. #features
5. #community
6. #answers
7. #using
8. #webdriver
9. #engine
10. #perform
11. #better
12. #injects
13. #compatibility
14. #browser
15. #documented
16. #hence
17. #xpath
18. #selectors
19. #therefore
20. #selenium
21. #inherently