Client-Side Performance Testing & Tools Importance and Introduction
Client side performance testing & tools have their own importance. If you’re worried about the performance of your web application, you need to test and analyze not only with what happens on the server but also with what happens in the browser. Some commercial performance-monitoring solutions already take this into account, allowing performance engineers to see how long it takes for elements to render, and then to execute, on your users’ browsers. There is also no shortage of open-source tools available for you to check and improve the ways in which your client-side programs are executing and working.
Page load time is one of the most important metrics in web applications. According to Yahoo, around 80% of application response time is spent downloading elements such as images, stylesheets, scripts, etc. To speed up response time requires strong servers and a well prepared and tested application.
This is where performance tests come in. They analyze the speed, scalability and stability of an application, checking for memory leaks, how the application works under a certain load, and look for any bottlenecks.
To provide better feedback, performance tests are divided into two types: server-side and client-side. When you are testing server-side code, you are testing the logic and readiness of your application. When you are testing the client-side, you are doing end-to-end testing.
To verify if an application is fast and efficient enough, we use client-side performance tests. This means checking the response time of a web application from the point of view of a single user. We execute these tests against two scenarios:
- A user coming to the web page for the first time (without cache).
- A user coming back to our page (with cache).
Client-Side Performance Considerations
Front-End Performance Testing Challenges
Performance depends almost entirely on everything. The greatest threat to performance was likely to be the connection speed, followed by server overload. The browser spent much of its time with a fully loaded page of HTML, just waiting for graphics and other content.
- How quickly basic page features load?
- Visible text.
- Formatting and layout (CSS).
- Functional elements (buttons, links, forms, etc.).
- Understanding the priorities on how quickly functional elements become responsive (at all) to user actions.
- How quickly functional elements are able to carry out user requests.
- How long it takes for the entire page and all of its functionality to load.
- Matching the exact real-world environment with real content and new code.
- Identifying which elements are important in a Page and when do they load?
- Concluding the issue – Is the issue Front end or Server-side?