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7c08450597
Adds a "fast" strategy for partitioning PDFs that uses pdfminer. The default strategy is "hi_res" and is the original partitioning logic that uses detectron2. If detectron2 is not available and the "hi_res" strategy is selected, partition_pdf fallsback to using the "fast" strategy. The implementation uses pdfminer because that's already installed as a dependency with the local-inference extra. There are other options for accomplishing this as well, but they would entail adding a new dependency. The "fast" strategy substantially speeds up processing.