mirror of
https://github.com/storytold/pdfcraft.git
synced 2026-10-24 10:08:00 -06:00
eb00280eba
* M1: stream data read from a file points into the file instead of being copied Every stream COS loaded was copied out of the document's bytes (`data[start..end].to_vec()`) and kept in the object cache until the document closed. Anything that reads every object therefore left a second copy of all stream data behind. That includes a full save, which edits needing a rewrite (repaired files, security changes, redaction) run on every change. A full save of a 208 MB document left 208 MB cached on it. `Stream::raw` is now `Bytes`: owned bytes, or a range of a larger shared buffer. Streams parsed from a document's own bytes are ranges of that buffer, which the document keeps anyway. Decrypted and newly built streams own their bytes as before. A stream added to a document from another document's file gets its own copy of just its bytes (`Document::set`/`add`), so it never keeps another whole file alive. Results, measured with an exact heap counter: - A full save of a 208 MB document leaves 0.2 MB cached instead of 208.2 MB. - The first full save of a freshly opened document is about twice as fast: 10 → 5 ms at 40 MB, 38 → 21 ms at 200 MB. Output is identical: 68 incremental and full saves of five originals, encrypted ones included, hash the same before and after. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * M1: the full-save capacity test (#523) builds its stream from Bytes --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Co-authored-by: Brandon Thomas <echelon@gmail.com>