What I still see in 4.3RC1 is confusing as ever.

OS X 10.8.2

MacBook Pro (15 inch retina)

2.6 GHz, quad-core i7

8 GB RAM

512 GB SSD

Nikon D800 NEF files (~32.5 MB, 7360 x 4912 pixels)

All 1:1 previews calculated before any "measurements".  Times (as shown in the Acvity Monitor application) are from the start of any CPU activity until activity ceases.  Zoom to 1:1 several times at each stage in order to populate any caches.

Library Loupe view

zoom to 1:      ~7 1/2 sec

Library Grid view

zoom to 1:      ~4 sec

Why is this operation faster from Grid view?

Develop

zoom to 1:1     ~1 sec

Why is this ooperation faster in the Develop module than in the Library module?

Done.  Here is the link.

http://feedback.photoshop.com/photoshop_family/topics/lr4_3_slow_in_de velop_mode

Damn!  I posted the wrong link.

Now I can't find what I posted.  I'll do it again in the morning.

Will someone please supply the correct link to the site where I should have posted my problem report?

It looks to me like it is always redoing the 1:1 jpeg preview in Library even if you already have it. If you already have the 1:1 rendered it should just use that but for whatever reason it doesn't. In Develop the zoom is fast because it only has to create the preview for the area you see in the viewport. I.e. it only renders a small subsection of the raw file which it should be able to do in subsecond time on this machine. Rendering an entire D800 raw file at 1:1 is of course a much more lengthy operation.

I think I have seen a post from someone who works for Adobe (Victoria Brampton?) which seemed to indicate that the problem is the Retina display - the Macbook just can't move the pixels quickly enough.

Bob,

I just tried it on my 15" MBP retina and there is no difference between zooming from the grid view or zooming from the Loupe view. This is with 1:1 previews generated. It takes about 1 to two seconds to zoom regardless how or where I do it. The only difference is that from the Loupe view it does the zoom animation, while from grid view when clicking 1:1 it goes through black. The raw files are 14-bit nefs from a D600, so even though not a D800, quite large too. The catalog and previews for these files is on the SSD drive. The nefs are on a USB 3.0 external disk. If I delete the 1:1 previews I get longer times for zooming because it needs to generate the 1:1 previews I am guessing, but only the first time I zoom.

The machine is a 2.3 GHz Intel Core i7, 16GB memory. Running 10.8.2. This is a quad core with 8 logical processors identified in System Info in Lightroom. I also noticed that Lightroom now shows that Camera Raw will only use 4 threads on this machine, probably to avoid hyperthreading.

Don't know why there is a difference with your machine.

Jao vdL wrote:

 

Bob,

 

I just tried it on my 15" MBP retina and there is no difference between zooming from the grid view or zooming from the Loupe view. This is with 1:1 previews generated. It takes about 1 to two seconds to zoom regardless how or where I do it. The only difference is that from the Loupe view it does the zoom animation, while from grid view when clicking 1:1 it goes through black. The raw files are 14-bit nefs from a D600, so even though not a D800, quite large too. The catalog and previews for these files is on the SSD drive. The nefs are on a USB 3.0 external disk. If I delete the 1:1 previews I get longer times for zooming because it needs to generate the 1:1 previews I am guessing, but only the first time I zoom.

 

The machine is a 2.3 GHz Intel Core i7, 16GB memory. Running 10.8.2. This is a quad core with 8 logical processors identified in System Info in Lightroom. I also noticed that Lightroom now shows that Camera Raw will only use 4 threads on this machine, probably to avoid hyperthreading.

 

Don't know why there is a difference with your machine.

Many, many, thanks for taking the time to look into this, Jao.

I have been systemattically removing a lot of applications and utilities but, so far at least, nothing changes my situation.

I am at a complete loss to explain what the hell is going on my computer.

I'm open to any suggestions regarding how to figure out what is going on.

That's all for this evening

Rob Cole wrote:

 

I assume you already tried deleting the .lrdata folder (please forgive if this has already been stated).

The last thing I tried last night was:

(1)  write xmp to disk

(2)  remove all images from the test catalog

(3)  delete the .lrdata file

(4)  delete the .lrcat file

(4)  create a new catalog containing 7, D800 NEF files

(5)  generate all previews (1:1 previews are 2048 pixels)

The problem is exactly the same as before.