NBomber - Distributed load-testing framework for .NET. It is designed to test any system regardless of the protocol (HTTP/WebSockets/AMQP) or a semantic model (Pull/Push). It allows to write distributed load test scenarios in plain C# or F#.

NBomber as a modern framework provides:

• Zero dependencies on protocol (HTTP/WebSockets/AMQP/SQL)
• Zero dependencies on semantic model (Pull/Push)
• Very flexible configuration and dead simple API
• Native Debug - debug your tests using your favorite IDE (Visual Studio, VS Code, Rider)
• Informative Reports: HTML
• Realtime reporting:
  • NBomber Studio - is a powerful management tool designed by NBomber. Monitor tests in real time with NBomber Studio and conduct detailed result analysis to identify trends.
  • Reporting Sinks for integration with popular systems for real-time monitoring
    • InfluxDB
    • TimescaleDB
    • Grafana
• Protocols/extensions support:
  • HTTP,
  • WebSockets,
  • MQTT,
  • WebBrowser
  • Redis,
  • SQLite,
  • MongoDB
  • AMQP
  • gRPC
• Data Feed - inject real or fake data into your tests
• Distributed Cluster - run your load tests in distributed mode
• Load Simulation - simulate realistic workloads
• Dynamic Workloads - simulate dynamic workloads
• JSON Configuration - configure your load tests via JSON Config
• Asserts and Thresholds
• CI/CD integration (xUnit and NUnit runners are supported)

The main reason behind NBomber is to provide a lightweight framework for writing load tests which you can use to test literally any system and simulate any production workload. We wanted to provide only a few abstractions so that we could describe any type of load and still have a simple, intuitive API. Another goal is to provide building blocks to validate your POC (proof of concept) projects by applying any complex load distribution. With NBomber you can test any PULL or PUSH system (HTTP, WebSockets, GraphQl, gRPC, SQL Databse, MongoDb, Redis etc). With NBomber you can convert some of your integration tests to load tests easily.

One of the design goals of NBomber is to keep API as minimal as possible. Because of this, NBomber focuses on fully utilizing programming language(C#/F#) constructs instead of reinventing a new DSL that should be learned. In other words, if you want to write a for loop, you don't need to learn a DSL for this.

var scenario = Scenario.Create("hello_world_scenario", async context =>
{
    // you can define and execute any logic here,
    // for example: send http request, SQL query etc
    // NBomber will measure how much time it takes to execute your logic
    await Task.Delay(1_000);

    return Response.Ok();
})
.WithLoadSimulations(
    Simulation.Inject(rate: 10,
                      interval: TimeSpan.FromSeconds(1),
                      during: TimeSpan.FromSeconds(30))
);

NBomberRunner
    .RegisterScenarios(scenario)
    .Run();

Load Testing with C# and NBomber (Part 1)

• Abdul Rahman - Using NBomber for Performance, Load and Stress testing in ASP.NET WEB API
• Olena Kostash - Load Testing HTTP API on C# with NBomber
• ExecuteAutomation - HTTP Performance Testing with NBomber in C# .NET
• Stijn Moreels - NBomber Load Tests in the xUnit Testing Framework for Invictus
• Stijn Moreels - Integrating NBomber Load Testing with F# Expecto
• Anh Nguyen Viet - NBomber – Performance Testing Framework

• Website
• Documentation
• Blog
• Examples

We are US based company NBomber LLC (8 The Green, Dover, Delaware 19901, USA).