0.9.0

• Added OPT-11 (OPTIMIZE_BINARY_SLICE) to optimize the BUILD_SLICE and BINARY_SUBSCR operations into a single function when the slice start, stop and step is None or a const number.
• Fixed a bug in the set_optimization_level() being reset (thanks @tetsuo-cpp)
• Added a bytearray abstract value kind (thanks @tetsuo-cpp)
• Added a type abstract value kind (thanks @tetsuo-cpp)
• Optimized the compiled instructions to only update the frame last instruction field on error/exit branch
• Removed the "periodic work" method which was called for every for/while loop and put a function to call Py_MakePendingCalls for every 10th loop
• Added an improvement to the process stage to infer the abstract types of return values to methods of builtin types, e.g. str.encode
• Added a check in dis_native for when the compiled function wasn't compiled (thanks @tetsuo-cpp)
• dis_native will now pretty print the assembly code when the rich package is installed (thanks @C4ptainCrunch)
• pyjion[dis] is a new package bundled with pystorm3 and rich (thanks @C4ptainCrunch)

0.8.0

• Enhanced the process stage of the compiler with new abstract types, iterable, bytearray, codeobject, frozenset, enumerator, file, type and module
• Process stage will assert the abstract return type of any call to a builtin function (e.g. list(), tuple()), which will kick in the optimizations for a broader set of scenarios
• Added OPT-8 (OPTIMIZE_BINARY_FUNCTIONS) to combine 2 sequential binary operations into a single operation. Adds about 15-20% performance gain on PyFloat operations.
• Added OPT-9 (OPTIMIZE_ITERATORS) to inline the FOR_ITER opcode of a listiter (List iterator) into native assembly instructions.
• Added OPT-10 (OPTIMIZE_HASHED_NAMES) to precompute the hashes for LOAD_NAME and LOAD_GLOBAL dictionary lookups
• Fixed a bug where looking up a known hash for a dictionary object (optimized BINARY_SUBSCR) wouldn't raise a KeyError. Seen in #157

0.7.0

• Fixed a bug in JUMP_IF_FALSE_OR_POP/JUMP_IF_TRUE_OR_POP opcodes emitting a stack growth, which would cause a stack underflow on subsequent branch checks. JIT will compile a broader range of functions now
• Implemented PEP590 vector calls for methods with 10+ arguments (thanks @tetsuo-cpp)
• Implemented PEP590 vector calls for functions with 10+ arguments
• Fixed a reference leak on method calls with large number of arguments
• Support for tracing of function calls with 10+ arguments
• Disabled OPT-4 as it is causing reference leaks

0.6.0

• Added OPT-6 optimization. Frame constants are now used to speed up assignments to lists and dictionaries. STORE_SUBSCR will assert if something is a list, or dict and shortcut
  the assignment logic.
• Added OPT-7 optimization. The binary subscript operator is compiled to faster path under a set of circumstances, especially if the index/key is a frame constant. Hashes are precomputed
  and indexes for integer constants are converted to native numbers at compile-time.
• The native machine-code disassembler will show the actual position of the JITed code in memory, instead of starting the offset at 0
• The pyjion.dump_native() function returns a tuple with bytes, length and position
• Type inferencing has been improved for all inplace and binary operations
• Windows builds from source are fixed for when the user wants to compile against a checkout of .NET
• Implemented FAST_DISPATCH for additional opcodes
• Added a test runner for the CPython regression suite that tests the JIT in isolation
• Fixed a reference leak of (self) for the LOAD_METHOD opcode
• Fixed a reference leak of non C functions being called via Call (CALL_FUNCTION)
• Fixed a bug where (very) large tuples being created via the BUILD_TUPLE opcode would cause an overflow error
• Fixed a bug on BUILD_MAP being called with very large dictionaries caused a fatal error

0.5.0

• Added OPT-4 optimization. Frame locals (named variables known at compilation) using the LOAD_FAST, STORE_FAST and DELETE_FAST
  opcodes will use native .NET locals instead of using the frame's f_localsplus array.
• Improved performance in LOAD_FAST and STORE_FAST through OPT-4
• Added OPT-5 optimization. Frame push/pop on entry/exit are now inline CIL instructions.
• LOAD_FAST skips unbound local checks when proceeded by a STORE_FAST (i.e. slot is definitely assigned)

0.4.0

update release notes

0.3.0

• Added an optimization (OPT-1/OPTIMIZE_IS) to inline the "is"/ "is not" statement into a simple pointer comparison with jump statement. Compiles to inline machine code instead of a method call
• Added an optimization (OPT-2/OPTIMIZE_DECREF) to decrement the refcount without a method call, when the object refcount is >1 and then call _Py_dealloc if the ref count becomes 0. Replaces the previous method call
• Windows now uses the system page size instead of the default value of 1MB

0.2.0

• Added support for profiling compiled functions by enabling profiling (pyjion.enable_profiling())
• Added support for profiling C function calls, returns and exceptions
• Implemented a faster call path for functions and methods for 5-10 arguments
• Fixed a bug where the page size defaulted to 0 in the .NET EE, which caused a failed assertion (and fails to compile the function), would fix a large % of functions that previously failed to compile

0.1.0

• Added support for debugging compiled functions and modules by enabling tracing (pyjion.enable_tracing())
• Added support for debugging to catch unhandled/handled exceptions at runtime when tracing is enabled
• Added support for opcode-level tracing
• Fixed a bug on executing Pyjion with pydevd (VScode/PyCharm debugger) would cause the Python process to crash because of a doubly-freed code object (#7)

0.0.7

• Added a WSGI middleware function to enable Pyjion for Flask and Django (#67)
• Fix a bug on dictionary merging for mapping types incorrectly raising a type error (#66)