Why Is Load Testing Important for Web Applications

In Software Engineering, software testing is a key process of the Software Development Life Cycle (SDLC). The software comprises various components, and developers need to account for customer requirements while coding each one of these features.

Due to the complexities of user requirements and the long coding process associated with software development, there is always a possibility that potential bugs may appear in the application. Software testing is necessary to identify and remove underlying problems before the software moves into production.

One core process of software testing is load testing, which is responsible for evaluating an application’s response to changing load conditions. Testers conduct load testing by automating the testing procedure and letting multiple simulated users access the application simultaneously.

Load testing is most useful in situations where testers need to evaluate the behavior of websites under a high user load. Since websites and web applications have to constantly cater to thousands of users concurrently, the process of load testing becomes mandatory for them. This article will discuss why load testing is important for web applications.

The Goal of Load Testing for Web App

Like most testing strategies, load testing for web applications aims to expose system failures. Nevertheless, load testing is a specialized method for detecting issues directly related to user load.

Load testing is slightly different from other testing methods revolving around user load. Techniques such as stress testing evaluate the performance of web apps either in compromised situations or under extreme workloads. However, load testing only relates to the maximum speed and capacity of the web application in perfect working conditions.

Many testers rely on load testing to detect significant performance issues such as buffer overflow, memory leaks, and memory mismanagement. At the same time, the testing procedure can expose major issues in an application, like bandwidth limitation and load balancing problems.

Since we are evaluating the effects of user load on web applications, we can also evaluate other components that link to your web app. Therefore, it is possible to determine the upper limit of all major components in web app such as database, network restrictions, the capacity of servers, etc.

Lastly, load testing can also play a key role in helping companies develop service level agreements for their products.

Advantages of Load Testing

Load testing can reap several benefits for your web application. Here are some of the main load testing web app advantages:

Minimizes the Cost of Failure

The cost of identifying performance issues early is significantly less compared to later stages. If your web application starts to show its bugs after the launch, it can irreparably damage your company’s reputation.

You must either recall the application and move back to a previous version or halt your web app until all the bugs are fixed. Therefore, the resulting costs will always be taxing for your company and damage it severely. Gartner reports that, on average, downtime can cost companies as much as $300,000 per hour.

Load testing lets you detect these problems before your web app enters a production environment. As a result, it is considerably easier to resolve these issues, and you don’t need to pay the cost of post-launch error removal.

Improved Scalability

When software does not handle concurrent users well, it leads to issues such as poor utilization of resources and memory leaks. Load testing enables software teams to determine their application’s operational capacity limits. When the team knows the system’s limitations, they can easily identify the changes needed to make the product more scalable.

Greater Customers Satisfaction

When a software team evaluates the key issues resulting from increased user loads, they can identify problems related to delayed response time and software quality. Since software teams detect these issues before the release of the application, they can resolve those issues before production.

Minimizes the Risk of System Downtime

Studies show that 59% of Fortune 500 companies suffer from losses worth $46 million each year, even if they only have 96 minutes of downtime in a week. Load testing and stress testing enable testers to simulate real-time app usage under varying loads.

When the system is subjected to increased traffic, it can outline issues that cause downtimes. Therefore, resolving problems before they cause downtimes is easier, and the overall likelihood of system downtime is lower.

Identify Inefficient Code

If your product has a complexly written code, then it will not utilize resources efficiently. However, these problems are hard to detect in normal circumstances, and load testing is needed to identify them.

Importance of Web App Load Testing

The internet usage in society has grown considerably in the past few decades. Statista reports that the world’s current population of active internet users stands at 4.47 billion. With the increasing number of internet users, websites and web applications must be extremely robust in load balancing and handling high user loads.

At the same time, customers are more sensitive about user experience than they were ever before. Because customers have various options, they only use web apps and websites that offer them the best experience and results. According to one source, even a one-second delay in response time can decrease user satisfaction by 16%.

Load testing is an essential non-functional requirement for web applications. We need load testing to identify whether our web infrastructure is robust enough to handle the expected user load. This is why software testing teams conduct various tests on input/output reads, network throughputs, and the utilization of memory and server resources.

Load testing for web applications essential for creating the ideal user experience (UX), and increasing the quality of the final product. Here are other reasons why load testing is essential for web applications.

Ensuring the Availability of Service

Users from all corners of the world access web applications 24 hours a day and seven days a week. Therefore, these applications need to be available to all their users without a second delay. Load testing helps software teams identify issues affecting the application’s availability. Without it, we can never know if the web app will be accessible to all users under the expected user load.

Identifying Hidden Bugs

Web load testing is essential for determining hidden errors and bugs in a web application. Errors and bugs in your application can significantly affect your product’s usability and user experience. With the help of web app load testing, we can identify these errors without much trouble and eliminate them before they affect end users.

Facilitating Simultaneous Web App Usage

Since web applications are accessed over the internet, concurrent usage remains a mandatory requirement for these applications. Load testing a web application helps us understand how many concurrent users the software can handle simultaneously.

If you expect your business website to host several users at once, ensuring the system can cater to the expected number of users is essential. For websites and web services, load testing is as important as vehicle crash testing.

Ensuring Customer Retention

You can easily lose new and old customers if your website or web application breaks down suddenly. Therefore, by preventing website crashes, web application load testing ensures that your business stays afloat and retains all loyal customers.

Performance Improvement

Web development projects can be extremely complex and hard to implement effectively. Therefore, it is not uncommon for these applications to suffer from scalability, stability, and performance issues.

With the help of load testing, we can optimize databases and written code to reduce the time it takes to process requests while minimizing the likelihood of memory leaks and system crashes.

Load Testing Tools for Web Applications

Load testing tools are necessary for evaluating the effectiveness, reliability, capacity, speed, and scalability of web applications with hardware, network, and user software. There are many tools available for load testing web applications. Here is a list of the most used load testing tools for web applications.

JMeter

JMeter is an open-source software testing tool mainly used to load test web apps.

Core Features:

• Highly portable
• Multiple load injectors managed by a single interface
• Has 100% support for all Java-based apps
• Simple, yet crisp charts and graphs that display important resource usage monitors and load statistics
• Has support for integrated real-time, Tomcat collectors
• Requires minimum scripting efforts as compared to most load testing tools for web apps
• Simple, intuitive, and easy-to-use

LoadNinja

LoadNinja is an easy-to-use script-less load-testing software that offers advanced load-testing features.

Core Features:

• Manages virtual user activity in real-time
• Doesn’t require server machine and maintenance since it’s hosted on the cloud
• Offers load test creation without scripts
• Has real browsers instead of simulation for load test execution at scale
• Debugs load tests in real-time
• Specialized browser-based testing metrics with advanced reporting and analytics features

StresStimulus

StresStimulus allows testing teams to perform testing operations that are unavailable with most tools. The tool can automatically fix playback errors with the help of advanced proprietary autocorrelation features.

Core Features:

• End-to-end testing features starting from recording scenarios to delivering test results
• Offers both cloud and on-site testing through multiple load generators
• Intuitive user interface
• Available both as a Fiddler add-on or as an individual tool
• Gives the option to exports scripts in a Visual Studio test format
• Supports three scripting languages and offers support for manual testing

LoadView

LoadView is a software testing tool specialized for load testing. It allows testing teams to perform browser-based load testing for web applications, web APIs, and websites.

Core Features:

• Offers features for identifying bottlenecks
• Supports web applications in Java, HTML5, Flash, PHP, Ruby, Silverlight, and others
• Creates multi-step scripts for load simulation
• Enables you to build test scripts without coding
• Cloud-based load testing in real browsers
• Offers compatibility testing on over 40 mobile and desktop browsers
• Facilitates capacity planning

Web Application Load Testing in PFLB

Web application load testing is necessary for determining key performance bottlenecks caused by changing user loads. It helps us optimize our websites and web applications regarding scalability, performance, and stability. At the same time, it reduces the cost of detecting and resolving significant problems in the system and delivers a better user experience.

PFLB is a performance testing company with experience serving over 500 companies across all domains, from finance and healthcare to retail and technology. With years of experience, they can ensure that your web application delivers the highest user experience and helps you outperform your competition.

The company has significant expertise in Load Testing of web applications, and you can count on them to produce the best results.