THPDFJobProcessor.ExecuteLoadedOperationWithComparison
Executes an operation with an optional second borrowed document for generic or contract comparison
class function ExecuteLoadedOperationWithComparison(Document,
ComparisonDocument: THotPDF; Op: THPDFJSONValue; Output: TStream = nil;
Checkpoint: TNotifyEvent = nil): THPDFJSONValue;The unit is HPDFDocJobs; the caller owns both documents, the operation, output, and returned JSON value
compare and compare.contract require two loaded documents; other operation kinds retain the behavior of ExecuteLoadedOperation
Comparison restores both documents' decode limits, stream thresholds, and AutoLaunch settings; annotation artifacts additionally roll back their graph transaction
Binary output is privately buffered and budget-checked before copying to the caller stream; a stream failure may leave accepted bytes in that output but does not commit source annotations
The checkpoint runs throughout comparison work and preserves cancellation and budget exceptions