Get more from your JMeter HTTP/S Requests by writing them in Groovy. This tutorial will teach you to create more flexible load testing scripts to become a pro.
If your tested object has math functions, you can check them with JMeter. Read this post to learn to create Groovy functions that will load test your APIs.
Learn to create variables in JMeter with Java. The ultimate guide to creating your variables on JMeter. Master load testing by learning everything you need to know.