Continuous Profiling is the process of continuously collecting and analyzing application performance data such as CPU utilisation and duration of function executions.
For example, let's say you have an e-commerce website and you notice that the checkout process is taking longer than expected. By using continuous profiling, you can pinpoint the exact part of the code that's causing the slowdown and optimize it for better performance. It will highlight slow functions, expensive loops, infinite recursions, etc. This can lead to faster load times, happier customers, and ultimately, more sales.
When distributed tracing is awesome at looking at the code path between services and IO Operations, continuous profiling helps you see what exactly your code is doing at the code level.
In JavaScript, you can use tools like Node.js Profiler to profile your application and identify areas for improvement.