Bug 691114

Summary:	PDF transparency performance
Product:	Ghostscript	Reporter:	Dave Eberly <dave.eberly>
Component:	Graphics Library	Assignee:	Michael Vrhel <michael.vrhel>
Status:	RESOLVED FIXED
Severity:	normal	CC:	robin.watts, tor.andersson
Priority:	P4
Version:	8.70
Hardware:	All
OS:	All
Customer:		Word Size:	---
Attachments:	PDFTransparencyPerformance.pdf

Description Dave Eberly 2010-02-17 07:54:09 UTC

The computational time to render PDFs with transparency needs improvement. 
Several performance problems are summarized in an attached report.  The problems
are not restricted to any particular operating system.

Comment 1 Dave Eberly 2010-02-17 07:56:28 UTC

Created attachment 5959 [details]
PDFTransparencyPerformance.pdf

The performance problems are summarized in the attachment.  Solutions are
suggested.

Comment 2 Dave Eberly 2010-02-17 08:06:00 UTC

Created attachment 5960 [details]
pdf_trans_performance.xls

The spreadsheet is referenced in the PDF report.  It contains timings for
several PDF files that contain transparency and compares to rendering the files
with transparency disabled.  The referenced files are good choices for testing
as the performance problems are resolved.

Comment 3 Michael Vrhel 2011-08-17 22:36:19 UTC

*** Bug 689606 has been marked as a duplicate of this bug. ***

Comment 4 Michael Vrhel 2016-10-13 18:49:54 UTC

*** Bug 692249 has been marked as a duplicate of this bug. ***

Comment 5 Michael Vrhel 2018-12-13 23:01:09 UTC

Closing this as Robin has made some significant speed-ups in transparency with his templates and the SSE code is giving good acceleration.