Highlighted

Lightroom 6X slower to open a DNG than a PSD of the same file

Explorer ,
Apr 06, 2020

Copy link to clipboard

Copied

OK, the upside of the Stay at Home order is time to figure how really bad somethings are, and by that I mean Lightroom/Camera RAW.  A couple of months ago I noticed that it seemed to be taking longer to open DNG files, so today I tested opening a DNG and a PSD of the same file. The PSD opening in under 5 seconds the the DNG take over 31 seconds.  WTH!

 

I'm running

  • Lightroom Classic 9.2
  • Camera Raw 12.2
  • Photoshop 21.1.1
  • Windows 10 64bit
  • 64 Gigs RAM
  • SSD drives (C:, running drive, and Cache drive are all M.2 SSDs)

 

I've attached/linked a real time video of the two different files opening to Photoshop. For this video

  • Lightroom is open
  • Photoshop is open
  • I open the DNG file (13 Megs) - after it opens 32 seconds, I close it and
  • Open the PSD file (327 Megs)  - opens in under 5 seconds

 

The PSD files is 25x larger than the DNG, so why does it take 6x longer to open the DNG file?

 

https://vimeo.com/404671466

Followup answer.  It wasn't LRC that was the problem... it was PS.   When I White listed LRC, my load times were the same, when I White Listed PS, I came back to blazing speed.  🙂
Marv

 

TOPICS
Import and export, Performance, Problem or error, Windows

Views

253

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more

Lightroom 6X slower to open a DNG than a PSD of the same file

Explorer ,
Apr 06, 2020

Copy link to clipboard

Copied

OK, the upside of the Stay at Home order is time to figure how really bad somethings are, and by that I mean Lightroom/Camera RAW.  A couple of months ago I noticed that it seemed to be taking longer to open DNG files, so today I tested opening a DNG and a PSD of the same file. The PSD opening in under 5 seconds the the DNG take over 31 seconds.  WTH!

 

I'm running

  • Lightroom Classic 9.2
  • Camera Raw 12.2
  • Photoshop 21.1.1
  • Windows 10 64bit
  • 64 Gigs RAM
  • SSD drives (C:, running drive, and Cache drive are all M.2 SSDs)

 

I've attached/linked a real time video of the two different files opening to Photoshop. For this video

  • Lightroom is open
  • Photoshop is open
  • I open the DNG file (13 Megs) - after it opens 32 seconds, I close it and
  • Open the PSD file (327 Megs)  - opens in under 5 seconds

 

The PSD files is 25x larger than the DNG, so why does it take 6x longer to open the DNG file?

 

https://vimeo.com/404671466

Followup answer.  It wasn't LRC that was the problem... it was PS.   When I White listed LRC, my load times were the same, when I White Listed PS, I came back to blazing speed.  🙂
Marv

 

TOPICS
Import and export, Performance, Problem or error, Windows

Views

254

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Apr 06, 2020 0
LEGEND ,
Apr 06, 2020

Copy link to clipboard

Copied

File size is irrelevant here. Does the DNG have edits saved as metadata, including possibly local adjustments? This takes Lightroom time to crunch (which can be computationally intensive) and then display the edited DNG. The PSD file may not require any such intensive calculations.

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Explorer ,
Apr 06, 2020

Copy link to clipboard

Copied

Good Point.  To test I did another image.

 

RAW file - No Edits No Adjustments - 10.8 seconds

PSD file - No Edits - 2.3 seconds

 

Still 4.6 times slower to open a RAW file over a PSD.

 

Is there anything that can be done to speed this up? 

 

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
LEGEND ,
Apr 06, 2020

Copy link to clipboard

Copied

Lightroom has to render the image of DNG and RAW photos. In other words, it has to read the file and then do some crunching according to its internal algorithms, so you can actually view the image. With a PSD with no edits, it just has to read the pixels and display them, no other crunching, no algorithm to follow. So I doubt that there is anything you can do to make these times equal. Nor do I think you can get Lightroom to speed up the rendering of a RAW or DNG image ... (you can ask for fewer previews to be generated at Import, but that just slows things down later in the process).

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 1
Adobe Community Professional ,
Apr 06, 2020

Copy link to clipboard

Copied

dj is right. importing a dng file and doing the initial calculations is way more intensive than a psd file. PSD files have a fully rendered preview in them that Lightroom can use straight away and there is no math needed to demosaic the data. When you read a dng raw file it has to be demosaiced, fast load data has to be generated and then the embedded edits applied before you can actually display. One thing to do to speed up import is to use embedded previews in the import panel and to not generate smart previews. 

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Explorer ,
Apr 06, 2020

Copy link to clipboard

Copied

Jao,

Thanks.  Import is not really a problem I can start that and walk away.  It's the loading the images into PS for edit at 30+ seconds per image that is making me nuts.  In experimenting, so far I have discovered the primary cluprits are Hightlights, Shadows, and Dehaze... all add 10 seconds to the opening of a file, even if only the smallest amount is applied.

 

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Adobe Community Professional ,
Apr 06, 2020

Copy link to clipboard

Copied

Just watched your video and realized you are not talking about opening the file in Lightroom but doing an edit in photoshop from Lightroom. What you are showing does not look normal at all. When I do an edit in Photoshop from a raw or dng file it opens in a few seconds, basically the same time as it takes to open a tiff or psd when doing an edit in Photoshop.

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Adobe Community Professional ,
Apr 06, 2020

Copy link to clipboard

Copied

Looked at whether applying any settings you mention and it makes no difference to how long it takes to open in Photoshop. About 2 seconds before the image shows up rendered in Photoshop from doing an Edit in with Photoshop already running. That's about what I would expect. Something is wrong in your setup it appears.

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Explorer ,
Apr 06, 2020

Copy link to clipboard

Copied

OK, I've uploaded the DNG (Grand Marnier-147.DNG) that I'm using. 

I'd love to have a few people to the following test and see the open times, especially helpful if you are on Windows 10 64, but happy to have anyones help.

 

Start with LRC open
Start with PS open

Import the file, then

from LRC open the file to PS Ctrl+E (CMD+E) - how long does that take (Mine 10.5)

from LRC apply -10 Highlights, 3 Dehaze, 10 Shadow - how long does it take to open the file now?  (Mine 33.5 to 35 seconds)

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Adobe Community Professional ,
Apr 06, 2020

Copy link to clipboard

Copied

I don't see the dng. Where did you put it?

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Explorer ,
Apr 06, 2020

Copy link to clipboard

Copied

Well here mud in your eye.  I exported the file as a DNG from lightroom and got this message

"The attacment's Grand Marnier-147.dng content type (applicatiojn/Octet-stream) does not match its file extension and has been removed"

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Adobe Community Professional ,
Apr 06, 2020

Copy link to clipboard

Copied

If you want to share a dng file, you have to upload a file to a sharing service such as dropbox, box, google drive, onedrive, icloud, etc. and post the link here. You can't attach or upload those on this forum unfortunately.

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Explorer ,
Apr 06, 2020

Copy link to clipboard

Copied

Apparently you can't upload DNG or CR2 files here.  Put it on dropbox

https://www.dropbox.com/s/dva1a291jnn8662/Grand%20Marnier-147.dng?dl=0

 

 

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
LEGEND ,
Apr 06, 2020

Copy link to clipboard

Copied

So, for PSD , edit in PS, you are editing the original, no copy to be created. For DNG, that not being an option, either LRC or PS (I think LRC) creates a copy, a copy that has to be converted from RAW to raster.

 

But, that does look like way to much time. Mine goes a lot quicker.

 

Just another Adobe customer; My Sys; APP: LRC 9.4, PS 21.2.1; CMP: WIN WS 16GB OS 10 v1909 (18363), mid 2015 MBPr 15” 16GB MACOS 10.15.6; 4K EXT DSPY; CAM: Canon 5D Mk III, Fuji X-T3

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0
Adobe Community Professional ,
Apr 06, 2020

Copy link to clipboard

Copied

David, just for completeness, when you edit in Photoshop wuth a dng, Lightroom sends the location of the dng file and a xmp sidecar that it creates in a hidden area that contains the edit settings. Photoshop is then instructed to open that original file (so no copy is made!) using camera raw with the edit settings in the xmp sidecar and to demosaic and render it. That should take only about a second to accomplish for most raw files. Photoshop than creates an edit buffer with the rendered data and presents that. Only when you hit save in Photoshop is the new file created and will Lightroom be instructed to import the new file.

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Apr 06, 2020 0