Lr CC 2015 Significantly Slower

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  • Updated 3 years ago
Import speed of Lr CC 2015 vs Lr 5.7.1 is HORRIBLY slow. Have done several tests now with the following setup: On the same computer, using the same hard drives, with the same conditions, running Lr 5.7.1 alone and then shutting it down and running Lr CC 2015 alone. Created fresh new catalog for each, storing them on the same hard drive. Imported the same set of photos, choosing to have Lr generate 1:1 and smart previews. Lr 5.7.1 imported 971 RAW photos from Canon 60D in 45 minutes, took 1hr 18 mins in Lr CC 2015. It is close to 2x slower in the Lr CC 2015, making it harder for me to consider using the new version.
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Jeff Harmon

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Posted 3 years ago

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Simon Chen, Principal Computer Scientist

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Did you clear the camera raw cache in between to compare apples to apples? If you don't clear the camera raw cache in between, the second try would run faster because things could already be cached.

I also understand that you requested to build 1:1 during import for both. The other change in Lr 6 that might impact the performance is the default standard preview size. In Lr 6, the default is "Auto", which is the longest screen edge (in image pixels) of the attached displays. On my 15" MBP retina, it is a bump to 3840px. That means if you go full screen mode in Lr 6, there is no extra need to render.
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Jeff Harmon

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Not sure how to clear the camera raw cache, but that would show even worse for Lr CC because it was the second run import test.

I did have "auto" mode for 1:1 previews set, which I knew meant much bigger previews with my 2560x1600 screen resolution, but didn't notice any speed improvement after the imports between Lr 5 an Lr CC.
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Simon Chen, Principal Computer Scientist

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Go to user Preferences>File Handling>Camera Raw Cache Settings>Purge Cache.

It is alway good to purge the cache before doing any kind of performance comparisons.

What is your other import settings? Copy as DNG, Copy, Move, Add? Build Smart Previews? Apply any develop or metadata presets?
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Jeff Harmon

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No DNG. Both adding the exact same photos from the file system. Yes building both smart previews and 1:1 previews. No develop or metadata presets. Simple import of RAW files building those previews.
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Simon Chen, Principal Computer Scientist

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Try turning off building smart preview during import and only build 1:1 preview and do a similar comparison. Does it make any difference?
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Jeff Harmon

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I will give it a try and reply
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Philip Dickson

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Sorry to gatecrash, but after having just installed the new LR CC, it's slower than the previous version by some amount.
I'm a Photographer and trying currently to go through 1100 images from a wedding, after having built standard sized and 1:1 previews. It's taking 1-2 seconds per photo to show the standard size photo - versus a fraction of a second previously. That's going to total an extra 25minutes just to get through them the first time. Completely unacceptable. The time it takes to begin importing or exporting has also increased by up to 30secs. From hitting the button to the task bar coming up. (I'm not sure if it is slower to actually do the task - but it is disconcerting as previously it was almost immediate to begin).

With the new version, first I tried turning the GPU support on, with the preview size on Auto, as I read up about the new performance features. Now I've put the preview size right down and the GPU support off, as things were already noticeably slower. Nothing has sped up the performance so far.
I use an iMac 2.7GHz Intel core i5, 16GB Ram 1333Hz DDR3
Graphics card: AMD Radeon HD 6770M 512 MB

I've never had any problems until the new installation.

Can anyone recommend the best settings for quickly previewing images rapidly, as I deal with thousands of photos every week and cannot have this sluggish performance.
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Rory Hill

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Philip said: Can anyone recommend the best settings for quickly previewing images rapidly, as I deal with thousands of photos every week and cannot have this sluggish performance.

Not to be facetious, but LR has never been good at this, although not bad after generating 1:1 previews (sorry to hear you are having a problem), which in itself is time consuming. I suggest you use another program, like photo mechanic, to pick the keepers. I don't understand why everyone can produce a fast file browser except adobe in lightroom.