v1.6.0

Added

• Python Logging Integration - Forward Python's logging module to Erlang's logger

  • py:configure_logging/0,1 - Setup Python logging to forward to Erlang
  • erlang.ErlangHandler - Python logging handler that sends to Erlang
  • erlang.setup_logging(level, format) - Configure logging from Python
  • Fire-and-forget architecture using enif_send() for non-blocking messaging
  • Level filtering at NIF level for performance
  • Thread-safe - works from any Python thread

• Distributed Tracing - Collect trace spans from Python code

  • py:enable_tracing/0, py:disable_tracing/0 - Enable/disable span collection
  • py:get_traces/0 - Retrieve collected spans
  • erlang.Span(name, **attrs) - Context manager for creating spans
  • erlang.trace(name) - Decorator for tracing functions
  • Automatic parent/child span linking via thread-local storage

• New Erlang modules: py_logger, py_tracer

Performance

• Type conversion optimizations - Faster Python ↔ Erlang marshalling

  • Use enif_is_identical for atom comparison instead of strcmp
  • Stack allocate small tuples/maps (≤16 elements) to avoid heap allocation
  • Use enif_make_map_from_arrays for O(n) map building vs O(n²) puts

• Fire-and-forget NIF architecture - Log and trace calls never block Python execution

Fixed

• Python 3.12+ event loop thread isolation - Fixed asyncio timeouts on Python 3.12+

  • ErlangEventLoop now only used for main thread; worker threads get SelectorEventLoop
  • Per-call ErlNifEnv for thread-safe timer scheduling in free-threaded mode
  • Fail-fast error handling in erlang_loop.py instead of silent hangs
  • Added gil_acquire()/gil_release() helpers to avoid GIL double-acquisition

• Intermittent test failures on free-threaded Python - Added startup synchronization