Final answer:
I found an inefficiency in someone else's code while working on a group project for a web development course. I addressed it by optimizing the code and testing it to improve the website's performance.
Step-by-step explanation:
An example of when I found an inefficiency in someone else's code was when I was working on a group project for a web development course. One of my team members had written a piece of code that was causing the website to load very slowly. I addressed it by identifying the specific part of the code that was causing the issue, optimizing it by using more efficient algorithms and data structures, and testing it to ensure that it improved the website's performance.