fast, portable computation on images and tensors

 Halide is a programming language designed to make it easier to write
 high-performance image and array processing code on modern machines.
 Halide currently targets:
  * CPU architectures: X86, ARM, MIPS, Hexagon, PowerPC, RISC-V
  * Operating systems: Linux, Windows, macOS, Android, iOS, Qualcomm QuRT
  * GPU Compute APIs: CUDA, OpenCL, OpenGL Compute Shaders, Apple Metal,
                     Microsoft Direct X 12
 Rather than being a standalone programming language,
 Halide is embedded in C++. This means you write C++ code that builds
 an in-memory representation of a Halide pipeline using Halide's C++ API.
 You can then compile this representation to an object file,
 or JIT-compile it and run it in the same process.