0.4.0

Iris 0.4.0 – “Hybrid‑Runtime” 🎯

This release turns a proof‑of‑concept actor library into a full
hybrid runtime with a built‑in Cranelift JIT. Python users can now
offload math expressions to native code, and the core actor system
remains lightweight and dependable.

🚀 Highlights

• JIT first‑class

  • Full expression language with arithmetic, power, modulo, comparisons,
    booleans (and, or, not), ternary, chained comparisons and
    unary minus.
  • Loop support: range() generators, step/predicate filtering,
    constant‑unrolled loops, vectorized sum‑over semantics.
  • Heuristic optimizer that folds constants, simplifies algebra,
    handles math calls and casts, and safely rewrites loops.
  • Python decorator (@iris.offload(strategy='jit')) with fallback to
    original Python and a call_jit/offload_call API.
  • Configurable logging (IRIS_JIT_LOG env var + runtime API).

• Python integration improvements

  • Parser, codegen and heuristics now accept True/False literals.
  • JIT logging can be toggled from Python.
  • Offload decorator extracts return expression automatically.
  • Improved tests covering mixed expressions, generator loops, and
    logging API.

• Documentation & packaging

  • README reorganized to reflect hybrid runtime story and JIT
    capabilities.
  • Node.js maturity warning added.

• CI robustness

  • Fixed failing PyO3 tests by removing unreliable import iris
    calls; module is injected directly into sys.modules.
  • Added corresponding Python scoping fix.

• Miscellaneous

  • Numerous unit and integration tests added or strengthened.
  • Logging now goes through a centralized hook.
  • Code refactorings and cleanups (unused imports/warnings).

🛠 Upgrade notes

• The public Rust API (Runtime, Pid, message envelopes) is
  unchanged; only new JIT/pybind features have been added.
• Python helper iris/jit.py gained set_jit_logging/get_jit_logging.

Enjoy the speedups and let us know what you build!

Full Changelog: v0.3.0...0.4.0