Scala Native¶

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

• Low-level primitives.

  importscala.scalanative.unsafe._typeVec=CStruct3[Double,Double,Double]defsum(vec:Ptr[Vec]):Double=returnvec._1+vec._2+vec._3@maindefmain():Unit=valvec=stackalloc[Vec]()// allocate c struct on stackvec._1=10.0// initialize fieldsvec._2=20.0vec._3=30.0println(sum(vec))// pass by reference

  Pointers, structs, you name it. Low-level primitiveslet you hand-tune your application to make it workexactly as you want it to. You’re in control.

• Seamless interop with native code.

  importscala.scalanative.unsafe._importscala.scalanative.unsigned._@externobjectstdlib{defmalloc(size:CSize):Ptr[Byte]=extern}valptr=stdlib.malloc(32.toCSize)

  Calling C code has never been easier.With the help of extern objects you canseamlessly call native code without anyruntime overhead.

• Instant startup time.

  > time hello-nativehello, native!real    0m0.005suser    0m0.002ssys     0m0.002s

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