We build entire JavaScript, Ruby, and Python interpreters using the native code generator, so we do know it works for non-trivial applications and libraries. I've also used it to do things like compile the third-party Apache SIS geospatial library for use from a native application without issue.
The author's tried just one benchmark - there are many other benchmarks and use-cases. Twitter report it's around 11% faster for their real and extremely large codebase, so we also know for other people it's significantly faster.
We build entire JavaScript, Ruby, and Python interpreters using the native code generator, so we do know it works for non-trivial applications and libraries. I've also used it to do things like compile the third-party Apache SIS geospatial library for use from a native application without issue.
The author's tried just one benchmark - there are many other benchmarks and use-cases. Twitter report it's around 11% faster for their real and extremely large codebase, so we also know for other people it's significantly faster.