84 lines
2.5 KiB
Markdown
84 lines
2.5 KiB
Markdown
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---
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model: claude-fable-5
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service: claude
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session: b6b42e23-0454-4d9b-be1c-0a89d65aed1b
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timestamp: 2026-07-02T15:56:26Z
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git_ref: 65bf9df5
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scope: code
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substantive: true
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raw_file: 20260702T155626Z_65bf9df5_prompt_io.raw.md
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---
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## Prompt
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From `ai/prompt-io/prompts/issue_470.md`:
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> attempt to resolve
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> https://github.com/goodboy/tractor/issues/470
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> do it with /open-wkt, ensure you /run-tests on all
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> changes
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(plus a hard pause-for-human-review deadline of
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12:50PM EST.)
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Issue #470 asks to trim the ~0.42s `import tractor`
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cost — which dominates per-actor spawn latency on the
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`trio` backend — by lazy-importing heavy/optional deps
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(`pdbp`, `stackscope`, `multiaddr`, + audit of
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`colorlog`/`bidict`/`wrapt`/`setproctitle`).
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## Response summary
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Profiling showed the issue's dep-list only accounted
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for ~20ms; the dominant cost (~244ms) was
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`log.get_logger()`'s `get_caller_mod()` calling
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`inspect.stack()` at module level in ~39 modules —
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each call walks every stack frame (deep during nested
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imports) and scans `sys.modules` per frame via
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`inspect.getmodule()`.
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Changes, in impact order:
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1. `get_caller_mod()` -> `sys._getframe()` +
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`f_globals['__name__']` `sys.modules` lookup
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(~240ms saved).
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2. Issue's lazy-import checklist: `bidict`,
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`multiaddr`, `colorlog`, `wrapt` moved to
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`TYPE_CHECKING`/function-local imports;
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`platformdirs` function-local; `asyncio` +
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`.to_asyncio` deferred out of the `devx.debug` +
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`spawn._entry` eager paths (~15ms saved).
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3. PEP 562 `__getattr__` on `tractor/__init__.py`
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preserving public `tractor.to_asyncio` attr access.
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Results: `import tractor` 0.42s -> ~0.145s (~65%);
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sequential `start_actor` latency 0.40-0.44s ->
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~0.179s/actor. `pdbp` (needs `_repl.py` class-base
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restructure) + `platformdirs` (needs
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`UDSAddress.def_bindspace` protocol rework) documented
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as follow-ups.
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## Files changed
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- `tractor/log.py` — `get_caller_mod()` perf fix +
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lazy `colorlog`
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- `tractor/__init__.py` — PEP 562 lazy `to_asyncio`
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- `tractor/discovery/_addr.py` — `bidict` ->
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`TYPE_CHECKING`
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- `tractor/discovery/_multiaddr.py` — lazy `multiaddr`
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- `tractor/ipc/_tcp.py`, `tractor/ipc/_uds.py` —
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`Multiaddr` -> `TYPE_CHECKING`
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- `tractor/runtime/_state.py` — lazy `platformdirs`
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- `tractor/devx/_frame_stack.py` — lazy `pdbp` +
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`wrapt`
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- `tractor/devx/debug/_trace.py`,
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`tractor/devx/debug/_tty_lock.py` — lazy `asyncio` +
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`.to_asyncio`
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- `tractor/spawn/_entry.py` — lazy
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`run_as_asyncio_guest`
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## Human edits
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None yet — pending user review at the 12:50PM EST
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pause gate (test-suite results reported in-session).
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