JavaScript Performance Optimization: Regex Compilation & Backtracking

In this lab, you will work on optimizing the performance of regular expressions in JavaScript by using compiled regular expressions, reusing them, and avoiding unnecessary backtracking. These techniques will help you to minimize the time spent in creating and executing regular expressions, thus improving the overall speed and performance of your code. We will also cover some common pitfalls of regex usage and methods to avoid them.

Throughout this lab, we will guide you on best practices and methods to optimize your regexes, but it is up to you to figure out the solutions for each challenge. Make sure to pay attention to details and read the challenge instructions carefully.