Photoshop CS6: are my expectations too high?

Photoshop CS6 is very slow opening some files.
I am using Windows 7 Pro 64 bit, an
Intel Core i7-4770 CPU @ 3.40GHz,
16 GB RAM
2TB accelerated (via 32GB SSD) primary HDD (6gb Sata III) - OS and Photoshop on this drive
120GB Samsung Evo 840 SSD dedicated for scratch disk usage - no files on it whatsoever
The file I am using as a reference is a .psd file that is 166 MB in size. This file has many layers.
When I have cache tile size set to 128k it opens in less than 6 seconds. At these settings the document size reads 24.1M/929.6M and efficiency shows 88%
When I have Photoshop set to use 1024k cache tile size, opening this file takes a good 27-32 seconds. Document size shows 24.1M/4.45G and efficiency shows 30%! (scratch reads 18.4G/12.2G)
First off, I admit that when I installed the dedicated SSD for a scratch disk I expected I would see an immediate improvement in operating speed of Photoshop and that this particular file would load quickly even if I had set the tile cache to 1024k. However, I see virtually no difference in opening this file from before when I had no dedicated SSD scratch disk.
Are my expectations wrong on this count and if so why?
Second, I can't get my head around the issue with setting the tile cache size to 1024 creating such a difference in file opening speed when compared with 128k as well as the reported doc size of 4.45G and 30% efficiency!
I thought for sure I'd never see my efficiency drop down much below 100% due to the fact that I have so much ram (i have set Photoshop to use up to 85%) and that I have this dedicated 120GB SSD scratch disk. Why is the efficiency so low when I have unleashed Photoshop to use all 120GB of the SSD and the Scratch size reads 18.4G/12.2G so it doesn't even appear as though it is using much of the SSD, yet my efficiency remains at 30%!?
Are my expectations wrong here too, and if so, why?
thanks

Hi doctorhifi,
I was able to download your file.
Settings: Cache Tile Size: 1028K (my normal setting)
Dragging it from Explorer to Photoshop, the application opens and loads the file in 11 seconds. At that point I'm presented with a dialog with a list of 9 missing fonts (not unexpected, every system is different).
Just to get to the point where the dialog is presented, my Photoshop Temp scratch file grows to 27.4 GB. System RAM usage (per Task Manager) reaches 17.9 GB. Clicking through the missing font dialog and displaying the document causes RAM usage to go to 18.1 GB.
Doing Image - Reveal All takes another 8 seconds and results in a very wide 11413 x 3365 pixel canvas to be shown, which is white and extends off to the right. RAM usage is at this point up to 26.1 GB and the scratch file to reach 49.5 GB.
Settings: Cache Tile Size: 128K
Dragging it from Explorer to Photoshop, the application opens and loads the file in 7 seconds. At that point I'm presented with the missing font dialog.
Just to get to the point where the dialog is presented, my Photoshop Temp scratch file grows to 4.5 GB. System RAM usage (per Task Manager) grows to 9.0 GB. Clicking through sees RAM usage to go to 9.2 GB.
Doing Image - Reveal All takes another 5 seconds. RAM usage is at this point up to 11.2 GB and the scratch file at 8.0 GB.
- Faster and with much smaller numbers than with the large cache tile size.
It's pretty clear the smaller cache tile size is the better choice for working on documents similar to yours. And I have to say, I'm surprised to see the system resource usage go up so much just with the larger cache tile size - that's not typical. What IS pretty typical, however, is for Photoshop to chew through gigabytes like candy. I believe the fact that the RAM usage is a bit higher than the amount you have is probably why it takes quite a lot longer to open on your system with the large cache tile size.
I'll admit I don't know all the internal implications of the different cache tile sizes either, but Adobe DOES say that a "tall and thin" document will do better with the smaller choices. "Tall" meaning lots of layers.
I haven't looked your document over in detail yet to try to determine why it's quite so resource-intensive. I see on a quick glance that it has some smart objects that have been transformed. I wonder if something about having done that is causing some thrashing in the process of generating the final image.
-Noel

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First of all sorry for my english
I recently installed Photoshop and Illustrator CS6 and they tend to lag even on just during normal work operations like zooming, opening a file, selecting a tool, browsing menus etc etc.
Cpu, Ram and Gpu usage are normal, I mean when I use these software there's at list 85% of free Cpu, 1GB of Ram still available, and 80% of free GPU. And I got 30GB left on my hardrive which is little but I believe is enough.
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idunnoisok wrote:
I recently installed Photoshop and Illustrator CS6 and they tend to lag even on just during normal work operations like zooming, opening a file, selecting a tool, browsing menus etc etc.
... And I got 30GB left on my hardrive which is little but I believe is enough.
So I cannot believe this slow performance is due hardware limitations. There must be some driver issue or something else.
Anyone knows why CS6 is so slow?
Software version:
Photoshop CS6 13.0.1
Illustrator CS6 13.0.0
My Specs:
Os: Snow Leopard 10.6.8
Cpu: Intel Core i7 2.3 GHz
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
4GB ram
AMD Radeon HD 6750M
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Bottom line -- based on what I have seen with CS4, 4 GB memory is too low by at least a factor of x2 (16 GB memory would be even better), and I'd say a minimum of 100 GB free disk space is a must as well. I saw CS4 using more than 40 GB of "scratch disk space" and you are using CS6, which must use significantly more resources than CS4, and you indicate only 30 GB free space. That seems too low to me. I think other Adobe major software packages are similarly demanding, unlike any other software I have seen or used. For instance, I think you would have no trouble running MS-Office software (which is also known for using computer resources, but not anywhere as much as Adobe software).
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/private/var
under Go To Folder ...
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Since it sounds like you have now upgraded your RAM, that should help, but you may find that the swapfiles and sleepimage files are taking even more disk apce faster and I think 100 GB free space is needed to avoid further slowdowns.

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