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perf: import package re-exports on first use (#724)

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src/common/__init__.py and src/plugin_system/__init__.py resolve their re-exports lazily (PEP 562 __getattr__, __all__ and __dir__ unchanged, TYPE_CHECKING imports for mypy), and sync_manager imports numpy only where send_frame uses it. The web process no longer loads numpy, freetype helpers and PluginManager just to import path_safety, store_manager or schema_manager (~67 MB to ~54 MB RSS on a Pi 4). from src.common import X and from src.plugin_system import X keep working, including submodule imports.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-10-03 14:38:27 -04:00
committed by GitHub
co-authored by Claude Opus 5.5
parent ed0753c1ca
commit ef69201770
6 changed files with 286 additions and 40 deletions
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src/common/README.md
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@@ -17,7 +17,9 @@ Rules for the package:
- `from src.common import ...` re-exports `APIHelper`, `ScrollHelper`,
`LogoHelper`, `TextHelper`, `scroll_config` (plus `ScrollSettings`,
`configure_scroll`, `resolve_scroll_settings`, `refresh_hz_from_config`) and
the adaptive layout names below ([`__init__.py`](__init__.py)).
the adaptive layout names below ([`__init__.py`](__init__.py)). Each is
imported on first use, so `import src.common` or a submodule import stays
cheap; add a new re-export to `_LAZY` there as well as `__all__`.
## Summary