Minutes_2021_09_14

Numba Meeting: 2021-09-14

Attendees: Siu Kwan Lam, Todd Anderson, Ehsan Totoni Graham Markall, Nick Riasanovsky, stuart, Valentin Haenel, Jim Pivarski, Guilherme

NOTE: All communication is subject to the Numba Code of Conduct.

Python-3.10 status
- testing 3.10rc1 && 3.10rc2
- error changing across different run
- two patches available
- https://github.com/numba/numba/pull/7381
- https://github.com/numba/llvmlite/pull/769
Numba 0.55.0 plan
- Early Nov
- Python 3.10 (early Oct)
- NumPy 1.21
  - ufunc API changes; API deprecation expired
- Internal error handling behavior changes
  - opt-in
  - "hard errors" will not cause fallback compilation
  - "hard errors" --- any exception that is not subclass of numba.core.errors.NumbaError
- Compiler flags to be encoded in symbols
Numba 1.0 Plan?
- stability
- foundational features
  - cache, etc
- MLIR?
Numba 0.54.1 plan
- we have patches for most regressions now.
- remaining regressions is the 40% compilation slow down

#7378 - Type annotations are not handled well by @overload signature validation
#7379 - try .. finally construct throws AssertionError when try block throws exception
#7380 - Inlining functions with loops with the same induction variable name in python source causes parfors fail.
- maybe inline can rename all callee variables to have the callee function name as prefix.
#7383 - str is parsed as unicode_type thus can't be passed as str argument to func like np.argsort
#7385 - nrt_external API broken in 0.54
#7387 - Potential race condition in CUDA initialization
#7389 - lowering error in certain conditions
#7390 - Compilation Time Increases ~40% with Numba 0.54
#7392 - ERROR: test_azure_config (numba.tests.test_runtests.TestCase)
#7394 - iteration fails in tuple comprehension

Request for 0.55
- broadcast_to https://github.com/numba/numba/pull/7119
  - driven by need for vectorize support in aesara
  - Now merged