The JetStream 2 Benchmark Suite

JetStream 2 combines a variety of JavaScript and WebAssembly benchmarks, covering an array of advanced workloads and programming techniques, and reports a single score that balances them using a geometric mean. In total, prior to creating JetStream 2, the WebKit team was tracking its performance across six different JavaScript and WebAssembly benchmarks. For all but one of the JavaScript benchmarks in JetStream 2, individual benchmark scores equally weigh startup performance, worst case performance, and average case performance.

Source: webkit.org