Lightroom Classic: Interface is very, very slow on iMac Pro

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  • Updated 2 weeks ago
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Lightroom Classic CC (latest update atm) interface and other functions are very slow on iMac Pro. The actual edits and file renderings are quick, but interface is lagging, moving zoomed-in photo is very slow. 

Example - scrolling thru folder list on left side is lagging. Scrolling preset list is lagging. Moving photo around with touchpad/touch-mouse is very lagging. 

This is quite shocking to see on iMac Pro, which is supposed to be the super fast computer (and it is in any other respect, except Lightroom). 

Tried with and without GPU acceleration. Didn't notice any difference. 

Display is set to Default resolution.
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Karlis Dambrans

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Posted 2 years ago

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Dean Arnold

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This is my experience with a new Mac Pro 2019, 12core, 64GB 580X, 32" LG 4k Monitor running with Retina scaling (the issue can be replicated at all resolutions); fresh install of OS and All Adobe software etc. etc. etc.

This is a LR Classic issue only. As you can see from the video LR CC works just fine. Adobe need to fix the MacOS frameworks they use for Classic.

https://youtu.be/jMvjvxOKVFc
(Edited)
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Jan Maly

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I've been reporting this ever since 2015!!! Even had an Adobe support on a phone (in 2017) and they told me it is "known issues and will fix it soon".

Adobe just f***s with us! LRC and Photoshop (also) is a one big joke! Performence-wise.

We DO NOT need all those eye candy, easy-to-implement features in recent updates. LR did not have a major update for more than 5-7 YEARS! Same UI, same frameworks. Absolutely not ready for 2020 and on. CAN NOT handle hires screens. 

Buying new, more expensice HW will not help with any of that! 

Creative Cloud Lightroom is even bigger joke. Totally not ready for professional usege. 
(Edited)
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Ryo

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I could see the improvements in the develop module. I can walk around the slowness of library module by moving my window to my non HiDPI external display or shrinking the window as suggested before but that's really silly. And moreover Retina Mac has been around for a fairly long time.

What's the roadmap for rest of the UI rendering acceleration? 

I'm aware how shifting to Metal would have been a huge setback but it would be nice to have some transparency with users.


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Karlis Dambrans

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So, apparently today's (20200617) update (9.3 release) also includes some performance improvements. The list and grid scrolling is faster, moving from image to image is faster. Hallelujah! At least something.
It is clear, that the interface is not reworked to actually be "retina compatible", but it is now improved to the point, that using Lightroom (Classic) is not a total pain. 
It feels like for scrolling they are just dropping frames from animation, to make it move faster, while it still looks super ugly. I'll accept speed over aesthetics. 
But, still, its super sad, that this big company just cannot make one of their most popular products to be actually nice to use. All the effort is put in "new Lightroom", which still lacks a ton of functionality and is not an option for real professional use. 
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Karlis Dambrans

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Ook, so after a day of work with the new version i can say that... its still the same garbage as ever. Only the list/grid scrolling is faster, but actual work with images is still super laggy.

Oh, Adobe. I don't get it. Really you can't work with Apple to make your product actually usable on Retina screens? We just keep paying and paying you, but still, if I have to do the work quickly and without frustration, i have to use external non-retina screen and keep that gorgeous iMac Pro for emails... :( 
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Dean Arnold

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