Minutes_2021_10_12

Numba Meeting: 2021-10-12

Attendees: Graham Markall, Guilherme Leobas, Jim Pivarski, Nick Riasanovsky, stuart, Todd Anderson, Valentin Haenel, Siu Kwan Lam, brandon willard, Luk

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

0. Feature Discussion

• 0.54.1 released
• mypyc
  • Good for runtime type safety and add performance
  • Risk: would upcoming CPython interpreter performance enchancement make this obsolete.
  • Risk: miscompile
  • Results from black https://github.com/mypyc/mypyc/issues/886

1. New Issues

• #7458 - Refactor unit tests scraping stdout/stderr in cases where alternatives are available.
• **** #7462 - numba.pndindex accepts negative integers
  • discussion points:
  • pndindex can be fused with prange
• #7464 - Numba 0.54.1 Checklist
• #7466 - numpy.select won't compile if the choicelist contains non-vector numbers
  • unusal error with the Poison value from LiteralList
• #7467 - np.nditer won't broadcast 1D arrays
• #7468 - Building w/OpenMP on macOS
• #7469 - Selection of records already indexed with other array returns unexpected values
  • #7470 - Array-then-scalar chained indexing into an array fails
• #7472 - list append failed
• #7473 - Why type of variable 'd' cannot be determined?
• **** #7474 - Wrongly evaluated equality comparison
  • Discuss: responsibility of unpacking Optional type
  • need common util to handle Optional before going into @overload
• #7476 - @jit np.stack and np.concatenate - tuples only - unlike numpy
• #7478 - Incorrect silent conversion from float64 to float32 in cuda jitted function

Closed Issues

• #7463 - Support current Python 3.10 and numpy 1.21?
• #7475 - Working with numba and nproll error

2. New PRs

• #7457 - Factor out target registry selection logic
• #7459 - Include compiler flags in symbol mangling
• #7460 - Testhound/fp16 support
• **** #7461 - Support NVIDIA's CUDA Python bindings
• #7471 - Add constant propagation optimization pass
• #7477 - Fix unicode operator.eq handling of Optional types.

Closed PRs

• #7456 - Fix invalid codegen for #7451.
• #7465 - Update changelog for 0.54.1 release

3. Next Release: Version 0.55.0/0.38.0, RC=Early Nov

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