16-30+ seconds in library to load every pagefull of RAW CR2 images

[Digital-Finger]

LRC is unusably slow:

16-30+ seconds in library to load every pagefull of RAW CR2 images on 27" Intel iMac 64GM RAM 
I've tried disabling graphics ( and restarting).
Smart previews exist for all images.

suggestions please

Iv'e looked at activity monitor and occasionally it s LRC is not responding...then it does

[GoldingD]

16-30+ seconds in library to load every pagefull of RAW CR2 image

• Is that for one RAW or many RAW files?
• And is that at Import, or later?
• And what do you mean by "pagefull"?

[Digital-Finger]

By page full I mean the whole of the 27" screen space available in LRC

NOT IMPORT, files are already there some worked on before , most not

somet RAW files, sometimes RAW and tiff or psd, jpg etc

[JohanElzenga]

You need to be more specific. I assume you mean a page of the Grid view, so maybe 20 small images? Do you mean that you have to wait so long for Lightroom to do anything, or do you mean the page comes up quickly but it takes up to 30 seconds for all the thumbnails to show? If Lightroom does not have up to date thumbnails, then it needs to build them. That can take 1 or 2 seconds per thumbnail depending on the speed of your computer, so up to 30 seconds to see a page with say 20 thumbnails is not excessive in that case.

[Digital-Finger]

Roughly 7 images down+16 across-makes roughly 110+ to view
thing is the previews already exist
Also it used to be faster.
What I expect is the previews to load in approx 5-10 secs, that's normal.  Now even if they load that fast LR remains unresponsive for another 25 secs approx with spinning ball if I try to scroll to next page etc

Thing is that I've used LR for ages and it never used to be this slow (unresponsive) so something's changed...and Sonoma I am beginning to suspect is the culprit

[Digital-Finger]

ps when I say 25-30 secs I mean average sometimes I just go and make a cuppa it hangs so long

[GoldingD]

So, when we look at the screenshots the author posted (attached). some oddity's show up

In Activity Monitor, under Memory, LrC appears to be stalled

while under CPU, LrC appears to be using way too much

 I am no longer a MACOS user, so I cannot bring this up and study directly. For any member that is, that % CPU, what does 1.508.2 indicate? Ok, that represents multi cores in heavy use? Not actually 1000%. And apparently the CPU is so busy that the activity monitor is having trouble presenting the truth??

And when we look at the bottom of that second screenshot (I missed this). It is more like 99% (bad) heavily under User.

And per: https://support.apple.com/lt-lt/guide/activity-monitor/actmntr43452/mac

"User: The percentage of CPU capability that's being used by apps you opened, or by the processes opened by those apps."

So LrC in this case.

Ok, so an inquiry to the OP/Author.

1. When those previews finally load, when LrC finally responds, does it then behave until you close it?

2. If you close LrC, then restart the MAC, does LrC once again behave poorly?

[Digital-Finger]

Thank you for your comments. To answer your questions: once the images load (appear) which may even take a mere 5 secs, LRC may at that point start to misbehave ( stop responding) but after it has finished whatever it was that  then had taken it +/-30 secs, it returns to normal and once again behaves at an expected speed 

If I then scroll down to the next  page ( the next images to view) the same issues repeat.

sometimes all the images show in 5 secs, sometimes they take ages. It has already separately created smart previews for the whole catalog. CR2 images will take longer to load but often load initially quickly.

either way scrolling to the next page will freeze everything ( can't scroll, spinning ball, clicking an image won't highlight it etc ) either immediately or after 5-10 secs. 

on quitting and restarting LRC it may work faster for the first page or second but then scores to this crawl until it clears whatever it's doing 

if I scroll from a page where it had finished mucking about back to a page it had just previously shown I get the same behaviour so it doesn't resolve whatever issue it has if you return to it 

closing and restarting Mac makes no difference 

[GoldingD]

This word "page" that you keep using. I do not understand that use of that word in LrC.

Can you take a video capture of what is occurring and share that?

[Digital-Finger]

Sure_ by 'page' I mean the screen containing pics, a new page would be the next scroll down

[GoldingD]

So, in many of those thumbnails, upper right corner, the three dots.

Hmm, search on google not helping me just yet.

Indicates a process such as preview creation underway, or just reading metadata underway?

But would that only occur at import?

fellow members???

[GoldingD]

Inquiry.

This performance issue. This is not while or just after Importing is it? All those images with the three dots, they were previously imported? Or are you currently importing a couple of hundred or more?

And if they were imported, did you allow full preview creation upon import, or are you know revisiting the photos post import with a minimal preview creation having occurred?

[Digital-Finger]

All full previous imports

[GoldingD]

Ok l so another inquiry. Notice the photos without the three dots. If you close LrC, then restart LrC, do those photos still not have the three dots (that would be normal) or do they once again have those three dots (abnormal)

[GoldingD]

Aggg, I forget.

Three dots.

Often three dots in various areas of LrC indicate that info may be available by click on those tree dots. If you attempt to do so, does LrC come back with anything? Some info?

[Digital-Finger]

Thanks very much again for your input

Three dots: they are there whennever a page loads but clicking on them yields nothing, however after a while 15-30 secs they disappear

[Digital-Finger]

Video attached ( if it uploads)

first is it acting normal then slowing again, not the slowest its been, in fact since checking the suggestions here 'something' I think has made a difference in that it now seems much  better than earlier today though it is tsill doing 'lags'
 this example , every time the cursor stops it is actually clicking on an image or clicking in the scroll bar

 you can see some of the time it works fine then it doesnt. Previously the 'lags' were  much longer and with the spinning ball.

 I cant post a Video as even a short one compressed is four times the file size limit of 47MB ) as per error message)

[GoldingD]

Nope, no video showing up.

[Digital-Finger]

I couldnt do a screen grabvideo that wasnt too large a file -sorry

[GoldingD]

High CPU at start.

In your LrC, once started, in your catalog. Do you have any activity running that may slow things down.

specifically:

• Face Detection running, not paused. Face detection especially as it is a CPU hog.
• Address Lookup running, not paused
• Sync to cloud running, perhaps started at one point but never finished

a references on that:

https://community.adobe.com/t5/lightroom-classic-discussions/lightroom-classic-and-high-cpu-usage/td...

[Digital-Finger]

AFAICS none of those are running 

I have checked as far as I can that I have pressed the right buttons ( so to speak) in the right places but I am unfamiliar with those functions as I never have had need of any of them

Having checked Adobe community discussions on them in reasonably confident they have never been on and are currently off