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This replaces #161543, following @sobolevn's request and the feedback from the previous review.
The main change is to import
_wmilazily, soimport platformno longer has to load it upfront. I've also made sure failed queries aren't cached, added a test usingensure_lazy_imports, and included the suggested NEWS entry.I added a Windows-only guard around the lazy import. Without it, applications using a lazy import filter that rejects
_wmican fail to importplatformon non-Windows systems. I reproduced this on Linux and verified that the guard fixes it.On Windows 11, I measured
import platformgoing from 27.3 ms to 16.4 ms over 100 alternating runs. I also checked that the results returned byplatformremain unchanged.test_platformpasses on Windows and Linux, andtest_wmipasses on Windows (it's skipped on Linux).AI disclosure: I used GitHub Copilot to help with testing and benchmarking.