only SMIs are passed by value (because they are actually encoded in the reference data type) It might be a bit outdated but here's more https://github.com/thlo

only SMIs are passed by value (because they are actually encoded in the reference data type) It might be a bit outdated but here's more https://github.com/thlorenz/v8-perf https://github.com/thlorenz/v8-perf Also the https://v8.dev/ https://v8.dev/ blog is awesome.