Locust is an open-source, developer-friendly load testing framework written in Python. It allows users to define test scenarios as regular Python code using `User` classes with `@task` decorators and configurable wait times. The system supports HTTP and other protocols via built-in clients (HttpUser, FastHttpUser) and extensible contrib modules (MQTT, gRPC, Postgres, etc.). It provides a real-time web UI built with React/Redux/MUI for controlling tests and viewing statistics, a headless CLI mode for CI/CD integration, and a distributed architecture using ZMQ for master/worker coordination. The framework collects detailed per-request metrics (response times, percentiles, error rates) and can export CSV, HTML, and JSON reports. It also integrates with OpenTelemetry for observability. The codebase is well-structured with a clean event-driven architecture, extensive test coverage, and a plugin system for custom extensions.
Anteon (formerly Ddosify) is an open-source platform for Kubernetes monitoring and performance testing. It provides a CLI-based load testing tool (Ddosify) that supports scenario-based testing with dynamic variable injection, extraction from responses, and assertions. Additionally, it includes an eBPF-based agent (Alaz, in a separate repository) for Kubernetes service map creation and real-time metrics collection without sidecars. The self-hosted deployment (in the selfhosted directory) orchestrates the platform using Docker Compose. The core engine is written in Go with a modular architecture, featuring pluggable components for requesters, reporting, and scripting.