dev call 20220804

Dev Call: 4 August 2022

Present

Stepan, Florian, Tim, Simon, Matti, Antonio, Ronan, Du Toit, Gianluca, Mohaned

Agenda

• HPy Sprint Düsseldorf
• NumPy migration progress
• Cython/HPy
• HPy trace mode
• Module state (https://github.com/hpyproject/hpy/pull/328)
• Metaclass PR

Sprint

• CPython core devs will be at the sprint. We should use this opportunity and to make HPy more visible.
• Discuss platform tag for (pure) HPy universal binaries
• We could upload already like cmake (Python version can be None; platform tag needs to be there)
• Sort out what to do about mixed-mode binaries (== univesral + legacy)
• Concerning setuptools monkey patching: try to submit
• Simon: will try to make progress on the porting example (https://github.com/hpyproject/hpy/pull/246)

NumPy migration progress

• Mohaned works on full Numpy import and running benchmarks

Cython/HPy

• Matti tries to split Florian's changes such that we merge

Misc

• Metaclass PR
  • Tries to solve two issues: inheritance and metaclasses
  • We should split these problems
  • We can have a special solution for metaclasses right now and properly fix it with the inheritance solution
• Module state
  • If we have the module state, one can ask: what's the point then for HPyGlobal?
  • HPyGlobal makes migration easier because you can replace former C global variables with it.
  • but module state
  • There is another alternative to module state: a module context (like HPyContext but specific to the module). The difference to module state is that it would already provide handles.
  • Let's add this to the HPy sprint topics list. Stepan will prepare some concrete use cases.
• Argument clinic: Since we are running out of time this meeting, we will add that to the HPy sprint topics list.
• Pillow/HPy: Du Toit is working on benchmarking
• Gianluca currently works on imaging math and is in the process of setting up benchmarks
• We will fork Pillow and imaging math into hpyproject
• We should add CI to projects we think are stable (ujson, piconumpy, ...)