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badGarnet
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Feb 17, 2026
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Improve PDF fast strategy cold-start latency by lazy-loading hi-res-only imports in pdf.py.
This reduces first-call startup overhead without changing partition behavior.
Local benchmarks show a significant fast strategy cold-start speedup of ~35% from 2.75s -> 1.78s.
They also show a small hi_res slowdown (~2-4%), which is acceptable given the fast improvements.
Benchmark was run on 6 pdfs
https://github.com/Unstructured-IO/unstructured/blob/main/example-docs/pdf/DA-1p.pdf
https://github.com/Unstructured-IO/unstructured/blob/main/example-docs/pdf/chevron-page.pdf
https://github.com/Unstructured-IO/unstructured/blob/main/example-docs/pdf/embedded-images-tables.pdf
https://github.com/Unstructured-IO/unstructured/blob/main/example-docs/pdf/fake-memo-with-duplicate-page.pdf
https://github.com/Unstructured-IO/unstructured/blob/main/example-docs/pdf/interface-config-guide-p93.pdf
https://github.com/Unstructured-IO/unstructured/blob/main/example-docs/pdf/layout-parser-paper-fast.pdf
Note
Medium Risk
Touches core PDF partitioning by changing import timing and locations; behavior should be unchanged but there is some risk of missed/conditional imports causing runtime errors in less-tested hi_res/OCR/analysis paths.
Overview
Improves PDF
faststrategy cold-start performance by lazy-loading hi-res-only dependencies inunstructured/partition/pdf.py(moving severalpdf_image/unstructured_inference-related imports into_partition_pdf_or_image_localand other hi-res/OCR-only code paths), while keeping thefastpath lighter.Adds
scripts/performance/quick_partition_bench.pyfor quick local cold vs warm partition timing across one or more PDFs, updates the table metrics helper to importconvert_pdf_to_imagesfrompdf_image_utils, and bumps the library version to0.20.4with corresponding changelog entry.Written by Cursor Bugbot for commit b66ae0e. This will update automatically on new commits. Configure here.