Fix O(n) memory growth in PDF conversion by calling page.close() afte…#1612
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lesyk wants to merge 4 commits intomicrosoft:mainfrom
Open
Fix O(n) memory growth in PDF conversion by calling page.close() afte…#1612lesyk wants to merge 4 commits intomicrosoft:mainfrom
lesyk wants to merge 4 commits intomicrosoft:mainfrom
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fafuxa-ms
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Mar 12, 2026
smarsou
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Mar 13, 2026
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Problem
Fixes #1611. Since v0.1.5, converting large PDFs causes memory usage to grow linearly with page count (~1.1 MiB/page). A 400-page PDF consumes ~458 MiB instead of the expected ~7 MiB. The root cause is that pdfplumber's per-page cached properties (_rect_edges, _curve_edges, _edges, _objects, _layout) and get_textmap LRU cache are never freed during conversion.
Benchmark Results