Jpg export very slow in LightRoom 6

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  • Problem
  • Updated 3 years ago
  • (Edited)
Dear all,
With the upgrade to LR 6 CC I experience Lightroom requires an increased amount of system resources. It behaves extremely slow especially when it comes to an export of jpgs (takes > 2 Mins for a single export!!!). The workflow with LR 5 was fluent and I did not change any system components, therefore I consider this being a LR 6 issue.

Would you recommend to move back to LR 5.7?
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Werner Lott

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  • frustrated

Posted 3 years ago

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Rikk Flohr, Official Rep

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That behavior is abnormal, Werner. In a two minute span I typically get around 80-90 files to export.

Can you provide some system information?
Location of the export destination?
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Werner Lott

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Thanks Rikk for your reponse!!

Please find my system config below:
ASUS Notebook G73JH Series
Intel Core i7 Q720@1.60GHz
8 MB RAM
64 bit Windows Home Premium
2 HDD with 500 GB each:
HDD 1 (partitioned): Devices C: & E:
HDD 2 (partitioned): Devices D: & F:

Lightroom CC 2015 installed on Device D: with 232GB left free
Export device E: with 60 GB free space

I already created a new catalogue for the current task of approx. 1000 files.
Also I deactivated the gpu usage (with no effect at all).

The raw files have a size of ~40 MB each.
Does the export require an active internet connection for some reason?

Thank you very much in advance.
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Rikk Flohr, Official Rep

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Internet connection? Would be a really good test to perform. Is that possible?
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Werner Lott

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Do you expect the internet connection to have an impact on the export performance?
If so, this could be an issue since my connection is rather poor. I tested a minute ago with result as follows:
downstream --> 979 kbit/s
upstream --> 124 kbit/s

Is it possible to generally deactivate web access for Lightroom (e. g. mobile sync?)?

However, it seems to me Lightroom will consume most of the CPU's performance, since it's hard to edit images during an export.

Thank you so much!
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Simon Chen, Principal Computer Scientist

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8 MB RAM? Is that a typo? Can you copy and paste the text from Lr's system info dialog?
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Simon Chen, Principal Computer Scientist

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Do you have other tasks running inside Lr CC when the export happens?
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Werner Lott

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8 GB RAM of course ;-)
I closed all applications except Lightroom, to provide any resource available to Lightroom.
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Werner Lott

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and here is a screenshot of the info-dialog:
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Rikk Flohr, Official Rep

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Werner, I notice that you are not updated to CC2015.1 yet. Any reason?
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Werner Lott

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Rikk, indeed there is ... Creative Cloud comes up with the message below ("Update is being installed") which does not refresh for serveral hours now. I even cannot stop the update process by closing and restating CC.
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Werner Lott

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Now that I have reinstalled the Creative Cloud application, the Lightroom Update is being downloaded & installed. After completion I will send a feedback whether this helped solving my performance issue.

Thank you, RIkk & Simon!
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Rikk Flohr, Official Rep

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Let us know how it works.
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Werner Lott

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The installation is now complete. The application now behaves more "lightweight" again. A single file export isn't exactly quick, but acceptable.
I continued with testing an export containing 4 raw files, which could be processed in about 3 minutes.

What else can I do to improve performance?

Thank you so much for your help!
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Simon Chen, Principal Computer Scientist

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Lr 6 takes advantage of multiple CPU cores during export. It runs multiple export tasks in parallel under the hood if you have more than 4 CPU cores for your machine. Based on our internal testing, Lr 6 runs export faster than Lr 5.x on higher end machines.

That also means it would take compute resources away from other Lightroom tasks that you might be doing while the export is running.
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Werner Lott

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Since my laptop is some 4 years old, I would not name it a high end machine :-) But it still is fast enough for my purposes. There are 8 cores up and running.

I tried another export of 4 files ensuring to not working on other files meawhile: it took 3 min 26 sec.
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Robert Frost

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Try deleting the contents of the C:\program files (x86)\common files\adobe\slcache.

this has speeded up rendering of 1:1 previews for me by 4 seconds.

You have to sign in again afterwards.

It has been recommended by Adobe for various problems it seems. Nothing to be lost as when you sign in again it updates this folder.

Bob frost