Use Py_IS_TYPE on abi3 & python 3.15+

[bschoenmaeckers]

Avoid raw pointer comparison on ABI3 when Py_IS_TYPE is available.

xref RustPython/RustPython#7562

[ngoldbaum]

This also follows how CPython spells these check macros.

I seriously doubt adding one extra function call that can be inlined matters for non-limited API builds, but I'll defer to @davidhewitt to give this a look and hit the merge button.

[bschoenmaeckers]

@davidhewitt Any concerns?

[davidhewitt]

Definitely an improvement and matches CPython better too 🎉

[davidhewitt]

I would probably drop the newsfragment, seems like ultimately this is a refactoring that doesn't have external effect (yet)?

[bschoenmaeckers]

Thanks!

[codspeed-hq]

Merging this PR will not alter performance

✅ 105 untouched benchmarks
⏩ 1 skipped benchmark¹

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_{Comparing bschoenmaeckers:Py_IS_TYPE_ABI3 (f4cd954) with main (c24a951)}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩