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perf(extraction): integrate direct readers, workbook reuse and lazy backends - #153
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October 3, 2026 14:36
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Included review availability: This review used your included allowance. Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe PR changes extraction to read worksheet cells directly, share openpyxl workbooks within each pipeline run, and defer backend imports. It moves SciPy to an optional extra with Python fallback and adds regression tests, CI checks, benchmarks, and documentation. ChangesExtraction and clustering behavior
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Refactor Sequence Diagram(s)sequenceDiagram
participant Pipeline as run_extraction_pipeline
participant Session as OpenpyxlExtractionSession
participant Backend as OpenpyxlBackend
participant Loader as openpyxl.load_workbook
Pipeline->>Session: create extraction-scoped session
Backend->>Session: request workbook variant
Session->>Loader: load variant on first request
Loader-->>Session: return workbook
Session-->>Backend: provide worksheet
Pipeline->>Session: close after extraction
Merge Risk: ⚪ Minimal · up to No actionable issue is established that should prevent merging after normal checks. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to Workbook reuse is scoped to individual extractions, and the inspected changes preserve existing backend selection boundaries. No introduced security issue was established. Handling untrusted workbooks still depends on parser and Excel settings that were not verified. Retained concerns Security review detailsSecurity Blast Radius
Security Findings and Attack Paths
Trust Boundaries and Controls
Resilience and Maintainability Implications
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 59.76% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 164 functions across 21 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Up to standards ✅🟢 Issues
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| Metric | Results |
|---|---|
| Complexity | 89 |
| Duplication | 0 |
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October 3, 2026 06:36
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Actionable comments posted: 2
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @src/exstruct/core/cells.py:
- Around line 2067-2073: Update the session fast path in detect_tables to use
openpyxl_session only when its resolved file path matches the resolved
excel_path; otherwise use the normal detector on excel_path. Preserve the
existing default-detector check and table detection behavior for matching
workbooks.
Review comments at @tests/core/test_backend_import_isolation.py:
- Line 74: Update the workbook path passed to exstruct.extract in the probe to
resolve from the repository root derived from the test file, rather than relying
on the working directory; preserve the existing extraction mode and workbook.
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.github/workflows/pytest.ymlCHANGELOG.mdREADME.ja.mdREADME.mdbenchmark/baselines/issue148-2026-10-03-correctness.jsonbenchmark/baselines/issue148-2026-10-03-windows.jsonbenchmark/baselines/issues145-148-2026-10-03-windows.jsonbenchmark/baselines/issues145-148-standard-recheck-2026-10-03-windows.jsonbenchmark/issue148-results.mdbenchmark/issue148_clustering.pybenchmark/issue148_scipy_free.pybenchmark/issues145-148-results.mddev-docs/adr/ADR-0011-extraction-scoped-workbook-reuse-and-direct-cell-reading.mddev-docs/adr/ADR-0012-optional-scipy-border-clustering.mddev-docs/adr/README.mddev-docs/adr/decision-map.mddev-docs/adr/index.yamldev-docs/adr/reviews/ADR-0011-0012-2026-10-03.mddev-docs/architecture/pipeline.mddev-docs/specs/excel-extraction.mddev-docs/specs/extraction-performance.mddocs/api.mdpyproject.tomlsrc/exstruct/core/_lazy.pysrc/exstruct/core/backends/__init__.pysrc/exstruct/core/backends/base.pysrc/exstruct/core/backends/libreoffice_backend.pysrc/exstruct/core/backends/ooxml_backend.pysrc/exstruct/core/backends/ooxml_shapes.pysrc/exstruct/core/backends/openpyxl_backend.pysrc/exstruct/core/cell_types.pysrc/exstruct/core/cells.pysrc/exstruct/core/drawing_geometry.pysrc/exstruct/core/openpyxl_session.pysrc/exstruct/core/pipeline.pysrc/exstruct/core/shapes.pysrc/exstruct/core/workbook.pytests/benchmark/test_performance.pytests/core/cells_reader_expected.jsontests/core/test_backend_import_isolation.pytests/core/test_border_clustering_issue148.pytests/core/test_cells_reader_parity.pytests/core/test_openpyxl_extraction_session.py
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Summary
セル抽出のDataFrame変換、同一workbookの繰り返し解析、light経路の不要なbackend importを削減します。#145–#148を個別Orca worktreeで実装し、ローカルの統合ブランチに集約しました。
.xls入力は直接xlrdで読み、旧readerの値・NA・日時・cached formula・座標・リンクの意味を維持します。fastextraへ移動（allにも含む）。未導入時は既存Python BFSへfallbackし、NumPy必須・既存backend名・選択順序を維持します。疎集合BFS候補は評価用に留めます。ADR-0011/0012、内部spec、API/導入手順、CHANGELOGを更新しています。独立レビューで見つかったbackend alias overrideの回帰とADR索引の不一致は修正・再確認済みです。
Performance
Tests
uv run --locked --all-extras pytest -m 'not com and not render' -q --cov=exstruct --cov-report=term --cov-fail-under=80: 1017 passed、1 skipped、coverage 83.04%。uv run --locked --all-extras pytest -m com -q: 実Excel COMで8 passed。RUN_RENDER_SMOKE=1でpytest -m render -q: 実PDF/PNG出力3 passed。RUN_LIBREOFFICE_SMOKE=1/FORCE_LIBREOFFICE_SMOKE=1でLibreOffice smoke: 1 passed。[fast]導入ではSciPyの実labeling成功を確認。Windows COM/renderテストではRPC診断が出ましたが、テストプロセスは正常終了し、出力のassertionも成功しました。ローカル検証とremote CIの状態は別です。
Codacyの注釈に対応し、固定backendの静的import、liveなモジュール属性参照、通常のsession guardへ整理しました。初回remote CIではLinux/Windowsのテスト4組・base導入2組・Linux LibreOfficeが成功していますが、Windows LibreOfficeはテスト開始前のChocolatey外部ダウンロードが3回失敗しました。更新commitのチェックは別途実行されます。
Closes #145
Closes #146
Closes #147
Closes #148
Related to #142
Summary by CodeRabbit
fastextra for accelerated border clustering. Python-based clustering remains available without SciPy.