What's "other languages"? IO lists, which are the foundation of anything that build a string incrementally, are managed with vectored IO syscalls out of the bo

What's "other languages"? IO lists, which are the foundation of anything that build a string incrementally, are managed with vectored IO syscalls out of the box (readv/writev), which you'd have to handle yourself in most other languages, or resort to allocating and endless memory copying which Erlang is able to avoid.