stem/CS/Compilers.md

JIT

Just-in-Time

• Compilation during execution
  • At run time
• Bytecode translation to machine code for execution
• Combination of AOT compilation and interpretation
  • Speed of compiled code
  • Flexibility of interpretation
  • Overhead of an interpreter
  • Overhead of compiling
    • As well as interpreting
• Dynamic compilation
• Adaptive optimization
  • Dynamic recompilation
  • Microarchitecture-specific speedups

AOT

Ahead-of-Time

• Compile higher-level language or intermediate representation to machine code
  • Runs natively
• Machine-optimized code

GCC

• Standard compiler for GNU projects and Linux
• Parse source code to produce abstract syntax tree

LLVM

• Compiler infrastructure
• Develop language front ends for ISAs
• Apple sponsored