Scala Native

Scala Native is an optimizing ahead-of-time compiler and lightweight managed runtime designed specifically for Scala. It features:

  • Low-level primitives.

    type Vec = CStruct3[Double, Double, Double]
    val vec = stackalloc[Vec] // allocate c struct on stack
    !vec._1 = 10.0            // initialize fields
    !vec._2 = 20.0
    !vec._3 = 30.0
    length(vec)               // pass by reference

    Pointers, structs, you name it. Low-level primitives let you hand-tune your application to make it work exactly as you want it to. You’re in control.

  • Seamless interop with native code.

    @extern object stdlib {
      def malloc(size: CSize): Ptr[Byte] = extern
    val ptr = stdlib.malloc(32)

    Calling C code has never been easier. With the help of extern objects you can seamlessly call native code without any runtime overhead.

  • Instant startup time.

    > time hello-native
    hello, native!
    real    0m0.005s
    user    0m0.002s
    sys     0m0.002s

    Scala Native is compiled ahead-of-time via LLVM. This means that there is no sluggish warm-up phase that’s common for just-in-time compilers. Your code is immediately fast and ready for action.