> Meta’s primary supported server-side languages are Hack, C++, Rust, and Python.
> For specific use cases, we support other languages, including Java, Erlang, Haskell, and Go
Makes sense.
Python because ML.
Rust because of performance.
C++ and Java because all-the-things.
Go because 75% of all cncf.io projects are Go.
Haskell because elitism.
Erlang because stability.
/s
I think the real story is that migrating off PHP was too hard, so Hack was started which required a substantial C++ employee pool which meant that Rust was the ideal replacement to all of this skipping the Java/Kotlin and Go ecosystems altogether.
So not just scale at play here, a cause-and-effect of past hiring decisions.
> For specific use cases, we support other languages, including Java, Erlang, Haskell, and Go
Makes sense. Python because ML.
Rust because of performance.
C++ and Java because all-the-things.
Go because 75% of all cncf.io projects are Go.
Haskell because elitism.
Erlang because stability.
/s
I think the real story is that migrating off PHP was too hard, so Hack was started which required a substantial C++ employee pool which meant that Rust was the ideal replacement to all of this skipping the Java/Kotlin and Go ecosystems altogether.
So not just scale at play here, a cause-and-effect of past hiring decisions.