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perf(engine): return an unedited snapshot's source without copying it (#3276)

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This commit is contained in:
skylar taylor-barrick
2026-10-19 00:21:58 +02:00
parent 45cc429f90
commit 3ddf184413
1 changed files with 4 additions and 5 deletions
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crates/engine/src/lib.rs
+4 -5
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@@ -4116,21 +4116,20 @@ impl Session {
let rewrite = editor.cos.full_save_required() || editor.cos.encryption_changed() || editor.cos.revisions().is_empty();
guard(|| {
if on_saved || rewrite {
return write_incremental(&editor.cos, &opts);
return write_incremental(&editor.cos, &opts).map(Arc::new);
}
let mut base = pdfcraft_cos::Document::open_with_password(editor.saved.clone(), editor.saved_keys.reopen.as_deref())?;
if base.overlay_changes_from(&editor.cos)? {
write_incremental(&base, &opts)
write_incremental(&base, &opts).map(Arc::new)
} else if !editor.cos.is_modified() {
Ok(editor.cos.bytes().to_vec())
Ok(editor.cos.bytes().clone())
} else {
// Undo restored security from before the last save: append the snapshot to its
// own source, which it hasn't changed security against.
write_incremental(&editor.cos, &opts)
write_incremental(&editor.cos, &opts).map(Arc::new)
}
})
.map_err(EditError::Write)?
.map(Arc::new)
.map_err(|e| EditError::Write(e.to_string()))
}