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Bug #12675

Equalizer makes big image export about 130 times slower

Added by andy s 25 days ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
Lighttable
Target version:
-
Start date:
05/23/2019
Due date:
% Done:

0%

Affected Version:
git stable branch
System:
other GNU/Linux
bitness:
64-bit
hardware architecture:
amd64/x86

Description

For certain conditions export of image takes about 8 minutes, while for slightly different conditions (normal situation) it takes max 10 seconds.

Too long export occurs when:
- image is over ~6000 px in width
- equalizer is enabled even without any custom settings or any presets, just enabled
- image is similar to attached image of chamomile (white, noisy, background)

Images smaller than ~6000px (width) aren't problematic, export works as expected, but bigger than that causes problem. It's not exactly 6000, could be 6500, or 5500, I don't know where exactly "border" is. In fact images about 5000 px works pretty fine.

Image chamomile is problematic, while image of grapefruit is not although they both have the same settings of equalizer (default clarity or none, just enabled). Both images are attached, but in smaller sizes.

Problem occurs on 2.6.2 and 2.6.0, both versions were built from tar.xz files.

Linux Mint 18.3 Sylvia 64-bit
Kernel Linux 4.4.0-67-generic x86_64
MATE 1.18.0

20190520-172127-DSC07124_06.jpg (118 KB) andy s, 05/23/2019 05:47 PM

20190409-170420-DSC09040_01.jpg (149 KB) andy s, 05/23/2019 05:47 PM

DSC07124_01.JPG.xmp (18.3 KB) andy s, 05/23/2019 05:58 PM

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