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Catalina, PM 6 & Headache. Super slow experience

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zhpenn:
yes I did, but still the same

Kirk Baker:

--- Quote from: zhpenn on October 19, 2019, 12:25:30 AM ---yes I did, but still the same

--- End quote ---

I watched your video.  It's hard to tell what's going on because the video is from a cell phone camera and isn't a screen capture.  But it certainly seems to be moving along at several frames per second.

Please post screenshots of your preferences pages, specifically the Contact Sheet, Files, Preview, Caching, and Render Cache pages.  Use the 'Attachments and other options' link when you're composing your reply to this message and there you'll be able to upload your JPEG format screenshots.

Thanks,

-Kirk

zhpenn:
Hi Kirk,
I now put two screens next to each other filming in the same frame, you can see there is a very big difference
http://bit.ly/2oOhyWu

and here is the setting screenshots
http://bit.ly/2pFiP1O
and this two options I did try turn off but it makes no difference, so I turn it on again because I do need this two function.
turn off "Enlarge photos to fit previews and slideshows"
turn off "Synchronize single selection between Preview and Contact Sheet"

can you please have a look and check where is the problem, thanks a lot

Kirk Baker:

--- Quote from: zhpenn on October 20, 2019, 02:47:15 AM ---and here is the setting screenshots
http://bit.ly/2pFiP1O
and this two options I did try turn off but it makes no difference, so I turn it on again because I do need this two function.
turn off "Enlarge photos to fit previews and slideshows"
turn off "Synchronize single selection between Preview and Contact Sheet"

--- End quote ---

Suggestions:
In the Contact Sheet tab, change the High DPI Display Quality to "Best (uses more memory)"
In the Preview tab, change the High DPI Display Quality to "Best (uses more memory)"
I'd also suggest turning those two check boxes back off.  They should make a difference.
In the Caching tab, I'd set your Memory Cache all the way to the left (10%).

If none of this makes a difference then I'm going to have you turn on some logging and test previewing and get the log to me.

-Kirk

zhpenn:
Hi Kirk,
Thank you, I have tried all your suggestion. I think I found the problem.
Only need to change 2 of the setting. The Preview tab, change the High DPI Display Quality to "Best (uses more memory)"
and turn off the "Enlarge to fit" at the same time, will make it faster.

If I select the Standard (fastest) Quality, the image does show larger, but it becomes slow again.

but this actually not feasible, because if I turn  "Best (uses more memory)"  on, I can not use the full screen, a lot of my image only shown 1/4 of the size of my 15-inch MacBook pro. hard to see the detail of the image.

I'm not sure if this problem happens in all High DPI monitors, like 4K monitor?

But is there any way on your end that can optimize this performance?

thank you very much.

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