[aykevl]

There are 3 LLVM-based Go compilers that I'm aware of: gollvm, llgo, and tinygo. Of those, only TinyGo reimplements the runtime that causes lots of (code size) overhead in the other compilers.

There is more to a toolchain than translating source code to machine code. I'm sure the others do that job just as well, but only TinyGo combines that with a reimplemented runtime that optimizes size over speed and allows it to be used directly on bare metal hardware: binaries of just a few kB are not uncommon.