1.4 beta - Batch conversion with skip existing file setting - extreme slow!

New issues i.e. issues that have been introduced in the latest test version.

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masterjp
Posts: 299
Joined: Fri Feb 13, 2009 4:37 pm
Location: Duesseldorf, Germany

1.4 beta - Batch conversion with skip existing file setting - extreme slow!

Post by masterjp »

I often use the skip existing picture feature in batch conversion, because I want to save time during conversion large picture archives.
Today I want to convert new files, but I already converted them a few days before. So XnviewMP starts the conversion.
I used the 4 core speed setting in conversion dialog, but the whole conversion works in single cpu core speed!
It is very slowly. In previous versions 1.3 or older the performance with skip existing files and multi core cpu usage was fantastic and fast.
Since version 1.3.1 and 1.4 betar the speed is very slowly, because it will use one cpu core only :!:

Why did you change this great algorithm? Please make it great again! :)



XNVIEWMP 1.3.1 and 1.4 beta:
======================

Input files: 72506
Extracted pages: 72506
Overwritten: -72506
Skipped: 72506

Total Duration: 13 minute(s)


XNVIEWMP 1.3:
=============

Input files: 32627
Extracted pages: 32627
Overwritten: -32627
Skipped: 32627

Total Duration: 16 second(s)

Finished at: Do Nov 24 20:48:19 2022
PC: Intel 8700k + Asus Z370-F + 16 GB RAM G.Skill
OS: Windows 10 Pro x64 (latest updates) | XN-View (latest stable version) |XnViewMP (latest stable version) | XnConvert (latest) | Adobe Photoshop Elements 2022 & Elements XXL 9
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xnview
Author of XnView
Posts: 38702
Joined: Mon Oct 13, 2003 7:31 am
Location: France

Re: 1.4 beta - Batch conversion with skip existing file setting - extreme slow!

Post by xnview »

Strange, in the 2 tests you have not the same number of files. Which output format? Which input format?
Pierre.