TurboFan (V8 optimising JIT)

RU: TurboFan (V8 optimising JIT)

V8's top-tier optimizing JIT compiler. It reads Ignition's type-feedback vectors and compiles bytecode using the Turboshaft IR (a CFG-based representation that replaced V8's original sea-of-nodes IR), applying speculative optimizations assuming previously observed types hold. If an assumption is violated at runtime, V8 deoptimizes and falls back to a lower tier. TurboFan produces the fastest machine code in the V8 pipeline but compiles much more slowly than Sparkplug or Maglev.