Since the initial release in 2014, the Speedometer benchmark has become essential for browser engines to enhance performance. The latest version, Speedometer 3.0, is a collaborative effort between Blink, Gecko, and WebKit. This release marks a significant advancement in web browser performance testing by introducing a more accurate way of measuring performance and a broader set of tests reflecting the modern web. For the first time, major browsers have come together to develop this benchmark, supported by a new governance model driven by consensus. Speedometer 3 now includes new tests that cover a wider range of user experiences, providing opportunities to optimize various aspects of browsing and improve user experience on the web.
https://browserbench.org/announcements/speedometer3/