Why does applying a preset after import take MUCH longer then applying it during import?

Forum|Forum|7 years ago
June 27, 2018
2 replies
791 views

I have a preset which is just applying lens correction. If i apply this preset during import, it basically takes no additional time. If i apply this preset after import, it literally takes 20x as long as the import process, if not even longer then that. Why does applying the same preset after import take so much longer compared to applying the same preset during import?

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TimKurth

Participant

I'm having the same issue and it definitely has nothing to do with creating previews. This started several months ago with an update. Applying a preset (regardless of the type, e.g. only sharpening or preset with all settings involved) to several hundreds of pics took only a few seconds before and now it takes like 10 Minutes.

Sean McCormack

Community Expert

Lightroom did change from Lua based presets to XMP based presets for better compatibility between it and Camera Raw a few versions ago, so yes there was a big change. The Preset changes should be instant, but evidently in your case, they're not. I don't have a solution.

Sean McCormack. Author of 'Essential Development 3'. Magazine Writer. Former Official Fuji X-Photographer.

johnrellis

Legend

You might be comparing apples-to-oranges, where the time to do the import doesn't include the time to build previews (which proceeds in background), whereas the time to apply the preset afterwards might include preview-building.

To do an apples-to-apples comparison, immediately after import, select all the photos and do Library > Previews > Build Standard-Sized Previews, and include that in the total time. Similarly, after applying the preset, do Library > Previews > Build Standard-Sized Previews, and include that in the total time.

M

merkkAuthor

Inspiring

So during my import process, i have the previews set to minimal. Just because of the way my workflow goes, I usually don't need or want previews of the raw files. I apply some basic corrections to the raw files, export them as tiffs and then build previews of the tiffs.

Your saying when I apply a preset to the raw files, it's also building previews of those raw files as it applies the preset? I don't think it's doing that. I just took a group of raw files, reset them, then applied my lens correction profile, and then had it build previews and it took a few seconds because it had to actually build the previews. It doesn't look like it built any previews just from applying the lens correction profile.

johnrellis

Legend

I'm not sure exactly when previews are getting built. To definitively test the hypothesis rather than making an assumption, include the time to do Library > Previews > Build Standard-Size Previews in your timings of both cases. (Build Standard-Size Previews won't take any extra time if the previews are already built.) If the revised times are the same, then that indicates that Import isn't building previews but applying the preset is. If the revised times are still significantly different, then the difference lies elsewhere.

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