V16.0 of Camera Raw is 10% as fast in Lightroom compared to v14.0 when converting to DNG

[willthisnamedo]

Or at least it is on my machine so I'm just surrendering that info for anyone else who is finding similar.

Raw to Tiff - Fine

Raw to Jpeg - Fine

Raw to compressed DNG (but full sized without jpeg preview) - 10% of the usual speed unless I switch to v14

All within tested within Lightroom - Preferences reset yadda yadda yadda

Lightroom v13, ACR v16, WIndows 10, 64gb ram, 7950x cpu, 3070ti.

[Rob_Cullen]

Lightroom-Classic (Version 13.01) does not use the ACR (Photoshop Plugin) at all.  The rendering from raw is entirely controlled within LrC.  (ie. ACR version should have no effect on LrC exports).

Your 'topics' include "DNG Converter"- does that suggest you are using the Converter App, or just selecting the DNG parameters in the LrC Export dialog?

My tests indicate I am not seeing similar in my Windows system. All three export versions, JPG TIF DNG, take almost identical seconds to export.

[willthisnamedo]

Hi Rob,

Why is there an option in Lightroom upon export to select the Camera Raw version?

I shoot weddings and when I export I go Raw to compressed (but not resized) DNG to an internal ssd and do a straight copy and paste of the Raw files  to an external drive. It's always the case that the DNG conversion exports in half the time as the other transfer.

Lightroom 13 in combination with Camera Raw set to V16 completely changes this. 30 minutes or more to convert 4000 R6 files. Changed the camera raw version to v14 and it's 4 minutes. All other settings are the same.

This is something I've been doing pretty much on a weekly basis for years.

[Rob_Cullen]

I don't have an answer. Your problems are seemingly beyond my understanding.

When you 'Export to DNG' you have options for "compatibility" of the exported DNG, but again this TBMK does not mean that LrC uses the ACR Plugin, so I wouldn't expect the ACR version installed to have any effect. However the coding in LrC v13 might have changed to cause the effect you are seeing.

"copy and paste of the Raw files to an external drive"- Is this step only for backup of the original files?

"DNG conversion exports" - I am still not sure you are talking about "conversion raw to DNG" or "Exporting as DNG".

Keep bumping your post until other experts might chime in.

[willthisnamedo]

On my machine anyway so I'm just surrendering that info for anyone else who is finding similar.

Raw to Tiff - Fine

Raw to Jpeg - Fine

Raw to compressed DNG (but full sized without jpeg preview) - 10% of the usual speed unless I switch to v14

All within tested within Lightroom - Preferences reset.

Lightroom v13, ACR v16, WIndows 10, 64gb ram, 7950x cpu, 3070ti

[olidie]

I came to this forum because I am experiencing the same thing. DNG Converter 16 is much, much slower than before. My guess is because it compresses files much more. Some DNGs from an original Nikon Z6II NEF are less than 2MB. That's way too much compression! Running a side by side test a DNG of the same 28MB NEF is 5MB in v15 vs 2MB from v16. Honestly I don't want my DNG this much compressed.