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Load Testing Blog

Angular Performance Optimization - *ngFor trackBy

Yet another blog post dedicated to Angular performance optimizations. This time we will use the trackBy function of the *ngFor structural directive to optimize changes made to the DOM tree and thus optimize performances when updating a large list of items.

The use case is still a simple web application that displays a list of books. Now, a form will let the user insert a book in the list, and Delete buttons will let the user remove items from the list:

Books list create from

Angular Performance Optimization - Web Workers

In a previous blog post we identified a potential performance issue caused by calling a method from the template of an Angular component and saw that time-consuming operations could still be a problem even for an optimized application.

Prime Number Application

Using the same use case - a very simple application consisting of a number input that compute the next prime number -, we will now study how to externalise long-running operations to a web worker.

Web workers makes it possible to run a script operation in a background thread separate from the main execution thread of a web application. The advantage of this is that laborious processing can be performed in a separate thread, allowing the main (usually the UI) thread to run without being blocked/slowed down.

  • in JMeter
  • 14 min read

Performance Testing, Artificial Intelligence and Machine Learning

We are going to look at how performance testing can work hand in hand with Artificial Intelligence and Machine Learning:

  • We will look at how we can use data gathered from performance test scenarios during execution to determine what functionality and what concurrent volumes and load profiles we should be testing.
  • We will use very simple mathematical models to do this in conjunction with a very simple database model with several manual steps to simulate the machine learning.

As there are many Artificial Intelligence solutions to choose from and for the purposes of this post this is the easiest way to discuss the principles of Artificial Intelligence working with performance testing rather than discussing a particular framework.