> Python also checks during runtime, but Haskell doesn't have that feature. Right? I don't know Haskell so can't answer that, but typically a statically typed

> Python also checks during runtime, but Haskell doesn't have that feature. Right? I don't know Haskell so can't answer that, but typically a statically typed language doesn't need that. Sometimes languages still provide runtime check, typically happens when their type system is lacking. For example in Go, if you use interface{} type, the type checking happens at runtime. That's why it is discouraged to use, because could be reason that slows down your code. > Julia's dynamic typing, and hence its ability to do specialization using runtime information, is part of why it can (sometimes) beat Fortran in numerical performance. I'm also not familiar with Julia, but from what I read is that for numerical types, Julia uses native types instead of using objects like Python. It looks like well written Julia code can enable the interpreter to infer types and then JIT can use that to optimize the code. Python doesn't have that functionality at least not yet.