Bug 707777

Summary:	Extremely long pixmap generation duration
Product:	MuPDF	Reporter:	Jorj <jorj.x.mckie>
Component:	mupdf	Assignee:	MuPDF bugs <mupdf-bugs>
Status:	RESOLVED FIXED
Severity:	normal	CC:	robin.watts
Priority:	P2
Version:	master
Hardware:	All
OS:	All
Customer:		Word Size:	---

Description Jorj 2024-05-08 11:20:54 UTC

PyMuPDF issue https://github.com/pymupdf/PyMuPDF/issues/3450

Reports a pixmap generation time of about a minute.
File https://github.com/pymupdf/PyMuPDF/files/15245545/temp-6.pdf

Reproducer: mutool convert -o test%d.png temp-6.pdf

Comment 1 Robin Watts 2024-06-20 14:37:32 UTC

Fixed with:

commit 1b5a31833d320da979ea5c61ffd79d36531f2e05
Author: Robin Watts <Robin.Watts@artifex.com>
Date:   Thu Jun 20 15:01:13 2024 +0100

    Bug 707777: Speedup transfer function application.

    Use memoisation to speed the application of transfer functions
    to softmasks.