Minutes_2019_05_07

Attendees: Stuart, Val, Todd

0. Feature Discussion

LLVM status
- split approach: LLVM 8 for all except ppc64le
- pending decision end of this week
- nothing new on LLVM issue tracker, follow up?
Deprecation warning status
- DeprecationWarning vs. PendingDeprecationWarning
- Anything else to deprecate?
Numba integration test status (ready to announce to world?)
- announced today via ML list + twitter
- unittests to run on itself
Iterator API public/backward compatible changes.
- https://github.com/numba/numba-integration-testing/pull/2#issuecomment-489128791
- https://github.com/numba/numba-integration-testing/pull/5#issuecomment-489148626
- Propose lowlevel.extending API, and keep new interface.
#3908 - Duplicate code with a dynamic aliasing check
- Consider option "alias={always, maybe, never}" to do {pessimistic branch, both branches, fast branch}
- Emit branch taken with print statment at runtime

#4068 - Mention TBB on install page
#4064 - Annotate HTML alignment broken in JupyterLab
#4062 - Result caching in Numba
**** #4058 - "Fatal Python error: deallocating None" at run time
#4057 - Misleading in numba.cuda.const.array_like
#4056 - LoweringError: Fail in nopython mode pipeline (raise/assert related, caching issue)?
#4055 - methods significantly slower than functions
#4053 - np.transpose crashes when passed a tuple bug
- unusual use case, ragged arrays?
- fix overload for transpose to check types + add asarray on input value
#4052 - Faulty Loop Unrolling for CUDA device functions
#4051 - Improve the efficiency of generating exponential random variables.
#4050 - cudnn interface or raw kernel CUDA
#4046 - Formalise optional dependencies doc
**** #4045 - Calling vectorize with parallel target inside njit
- danger of conflating parfors and vectorize(target=parallel)
- PR from ages back to unify and extract kernel body
#4040 - Numba namespace package in ipython bug easy
#4038 - Expose numba -s via python -m and in Jupyter
#4037 - Add Dataclasses support
**** #4036 - Issue with CFFI from_buffer, reference to buffer data deleted too early
- need to sort out refcounts
- speak to Siu
#4035 - Fancy Indexing for DeviceNDArray CUDA

**** #4042 - prange with creation of jitclasses ParallelAccelerator
- What machine.
- Can it be reproduced for performance testing.
#4032 - readthedocs build failure: cannot cache function: no locator available for file caching