Skip to main content
SeleniumDecoded
All Chapters Chapter 9

Performance & Scaling

Parallel execution, Selenium Grid on Docker and Kubernetes, headless browsers, and cloud platforms

  1. 1

    Parallel Execution

    Run Selenium tests in parallel to dramatically reduce test execution time.

    Selenium 3 & 4 Stable
  2. 2

    Selenium Grid

    Distribute tests across multiple machines and browsers using Selenium Grid for scalable test execution.

    Selenium 4 Stable
  3. 3

    Headless Browsers

    Run Selenium tests without a visible browser UI for faster execution in CI/CD pipelines.

    Selenium 3 & 4 Stable
  4. 4

    Grid on Docker and Kubernetes

    Deploy Selenium Grid 4.4x for real workloads: Dynamic Grid with Docker, the native Kubernetes session factory, the Helm chart with autoscaling, Redis-backed state, session events, video, and observability.

    Selenium 4 Medium
  5. 5

    Cloud Testing Platforms

    Run Selenium on BrowserStack, Sauce Labs, LambdaTest and similar services: the vendor-prefixed capabilities, tunnels to private environments, marking results, cost control, and when a self-hosted Grid is cheaper.

    Selenium 4 Stable
  6. 6

    Speeding Up Test Suites

    Where Selenium suites lose time and how to get it back: measure first, then cut command count, skip UI you are not testing, fix waits, parallelise, block third-party traffic, and shrink the suite itself.

    Selenium 4 Stable