NashTech Insights

NBomber – Performance Testing Framework

Anh Nguyen Viet
Anh Nguyen Viet
Table of Contents

In today’s fast-paced digital world, ensuring that the performance and scalability of your applications is very important. It is necessary to do the Performance testing to identify the bottlenecks, limitations of the system and helping to provide suggestions for improvement.

As we know, when it comes to performance testing, there’re many tools and frameworks available. For those currently working on .NET projects or interested in .NET technology. A performance framework can be considered, it’s free, flexible in approach and use. That framework is the NBomber.

In this blog, we’ll look into different aspects of NBomber.


NBomber is a modern and flexible performance framework, developed on the .NET platform and supports programming languages such as C#, F#. With NBomber, you can define and measure the performance of systems and services, helping to identify performance issues and optimize the overall system performance.


Who can work with NBomber

NBomber is suitable for various roles within the software development landscape: Developers, quality controller engineers, and performance testers can all leverage NBomber to conduct rigorous performance tests. Whether you’re working on web applications, microservices, or distributed systems, NBomber offers a versatile platform for performance validation.

Features of NBomber

Ease of Use

NBomber’s intuitive syntax and configuration make it easy to define and execute performance tests. Its streamlined approach allows users to quickly set up test scenarios, configure parameters, and monitor test results.

Multithreaded and Distributed Testing

NBomber enables you to simulate high user loads by utilizing multithreaded testing. It also supports distributed testing across multiple machines, allowing for scalability and accurate performance measurements.

System Flexibility

NBomber is protocol-agnostic, supporting various PULL or PUSH systems, such as: HTTP, WebSockets, GraphQL, gRPC, SQL Database, MongoDb, Redis, etc. This flexibility ensures that you can test a wide range of applications and services, irrespective of the underlying protocols used.

Customizable Configuration

NBomber offers extensive configuration options, allowing you to fine-tune test parameters based on specific requirements. You can adjust factors such as thread count, frequency, duration, and payload data, enabling precise and realistic performance testing.

Live Monitoring & Reporting

NBomber provides the capability for real-time monitoring while performance testing is in progress. When you run a test, NBomber offers performance metrics such as response time, throughput, error rate, and system resource utilization. These metrics are continuously updated and displayed directly on the NBomber interface.


Also, a report generated later (analyze and visualize the performance testing results):



NBomber can be easily integrated with popular CI/CD tools (ex: Jenkins, Azure DevOps, or GitLab CI/CD, etc). You can trigger performance tests, monitor results, and generate reports within your existing CI/CD infrastructure.

Integration with Monitoring Tools

NBomber seamlessly integrates with popular monitoring and logging tools such as Grafana, InfluxDB, Prometheus, Elasticsearch, etc. This integration enables you to aggregate and analyze performance test data alongside other system metrics.


  • Does not support recording.
  • Does not run natively in a browser.
  • Performance test scripts are just based on C# / F#.


NBomber is a potential option for performance testing framework. By leveraging NBomber, you can identify and address performance bottlenecks, deliver robust and scalable applications, and provide an exceptional user experience. For someone interested in .NET technologies, I hope that NBomber can also be an interesting framework to consider for your projects, as well as a new choice for you when working with performance testing


Anh Nguyen Viet

Anh Nguyen Viet

I'm a Senior QC Engineer, with more than 10 years of experience in the Software Testing Industry.

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