| | :warning: **Speedometer 3 is in active development and is unstable**. You can follow along with development in this repository, but see [Speedometer 2.1](https://browserbench.org/Speedometer2.1/) for the latest stable version. | |
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | |
| |
| # What is Speedometer? |
| |
| Speedometer is a benchmark for web browsers that measures Web application responsiveness |
| by timing simulated user interactions on various workloads. Our primary goal is to make it |
| reflect the real-world Web as much as possible. When a browser improves its score on the |
| benchmark, actual users should benefit. In order to achieve this, it should: |
| |
| - Test end-to-end user journeys instead of testing specific features in a tight loop. Each |
| test should exercise the full set of what’s needed from the engine in order for a user to |
| accomplish a task. |
| - Evolve over time, adapting to the present Web on a regular basis. This should be informed |
| by current usage data, and by consensus about features which are important for engines to |
| optimize to provide a consistent experience for users and site authors. |
| - Be accessible to the public and useful to browser engineers. It should run in every modern |
| browser by visiting a normal web page. It should run relatively quickly, while providing |
| enough test coverage to be reflective of the real-world Web. |
