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NBomber is a modern and flexible load-testing framework for Pull and Push scenarios, designed to test any system regardless of a protocol (HTTP/WebSockets/AMQP, etc) or a semantic model (Pull/Push).

NBomber is free, developer-centric, and extensible. Using NBomber, you can test the reliability and performance of your systems and catch performance regressions and problems earlier. NBomber will help you to build resilient and performant applications that scale.

• Main web page
• Documentation
• Roadmap
• Chat
• Patreon - We appreciate every little donation. If everyone we've ever helped gave back just small donation a month, we'd be able to bring you NBomber for years and years to come. If you or your company are using NBomber and willing to help keep the project sustainable, please donate via Patreon.

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.

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
• Cluster support
• Real-time reporting
• CI/CD integration
• Plugins/extensions support
• Data feed support

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();

Would you like to help make NBomber even better? We keep a list of issues that are approachable for newcomers under the good-first-issue label.