That depends on (a) how you define your measure for "performance" (see other comments that talk about the difference between microbenchmarking and application benchmarking), (b) the compiler that you use, (c) the WebAssembly implementation that the code finally runs on.

So, do not expect a clear answer to that questions. Probably no one really knows because of a lack of benchmarks and deployments in the wild that have been analyzed. That's why they made the benchmark.