Ensure your SMB is performing well. Learn to load test SMB/CIFS with JMeter with Groovy or the OS process sampler. Try out this demo and get better testing.
Learn more of the Custom JMeter functions plugin. Get more from you load tests and extend functionality by using JMeter functions in your performance test.
A Beginner's guide to API Functional Testing with Blazemeter. No coding necessary. API Testing as part of your Continuous Testing delivery.
Using Lodash? This benchmark will show you tried and true results for optimizing your code when importing Lodash libraries. The best way to use Lodash functions
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.