GeezerVison

As discussed in the issue, this uses lazy imports for two modules. time in zipimport is only needed by _parse_dostime. create_win32_code_page_codec in encodings, on Windows only, is needed only for code pages without a codec module.

@aisk is right about time. Logging, subprocess, asyncio, the REPL (through _pyrepl.commands), pip and pytest all import it anyway, so that half only helps short commands like python -c one-liners and scripts that don't use those modules. _win_cp_codecs is different: it stayed unloaded in every case I tried, including the REPL, pip, pytest and asyncio, because it's only needed when a code page has no Python codec.

On Windows 11, python -c pass got about 1.7 ms faster (release build of main, 200 alternating runs).

I added a test for each with ensure_lazy_imports, and both fail without the change. zipimport is frozen, so its test checks that time isn't imported at startup. test_codecs, test_zipimport, test_zipimport_support, test_lazy_import, test_embed, test_frozen, test_time, test_sys and test_cmd_line pass on Windows and Linux.

AI disclosure: I used GitHub Copilot to help with testing and benchmarking.

• Issue: Windows: avoid importing encodings._win_cp_codecs and time at startup #161510