If you are going to write a piece of code then you have an obligation to the user. Why? This is a service business. The user experience is the most important part of the service business.

If your code runs slower than another piece of code and both return the same result, you should use the other code. An article explaining the new "feature" runs poorer than the old "feature" may be providing a public service. But, I would really like to see code samples that help me provide the user with a better experience instead of a worse one.