[2018] Cache Tile Size. Logic of use. Help pls.

[Alexey Novoselov]

Please help me. I very tired to search information about that. Please explain to me logic of use "cache tile size". I did not find the answers in the documentation.

I read tips "use smaller to draw" or "use higher for complex editing, like filters", but I need to understand logic to myself and make decision.

Why am I asking this question?

I saw a perspective in these performance settings! And I do not give rest to the difference in 4k when choosing 1024k or 1028k. This would not have been done just because... I think...?

I have hardware:

Windows 10

CPU i5 6600

GPU GTX 1060

My tasks:

I need retouch huge size img (many layers with using tool "brush").

with love.

[DaveJCummings]

Maybe this will help, from what I read from Adobe in regards to Optimizing Performance in Photoshop this information is found at Optimize performance Photoshop CC .  I underlined , bolded and put in italics, the wording related to Tile Size

Adjust cache levels

Cache basics

Photoshop uses image caching to speed up the redrawing of high-resolution documents while you're working on them. You can specify up to eight levels of cached image data and choose one of the four available cache tile sizes.

Increasing cache levels improves Photoshop’s responsiveness while you work, although images may take longer to load. The cache tile size determines the amount of data on which Photoshop operates at a time. Bigger tile sizes speed up complex operations, such as sharpening filters. Smaller changes, such as brush strokes, are more responsive with smaller tile sizes.

Cache presets

Three cache presets are available in the Performance preferences. Choose the one that matches your primary use case/purpose of using Photoshop:

• Web/UI Design: Choose this option if you use Photoshop primarily for web, app, or screen design. This option is appropriate for documents having numerous layers of low-to-medium pixel dimension assets.
• Default/Photos: Choose this option if you use Photoshop primarily to retouch or edit moderate-sized images. For example, use this option if you normally edit photos originating from your mobile or digital camera in Photoshop.
• Huge Pixel Dimensions: Choose this option if you work extensively with heavy documents in Photoshop; for example, panoramas, matte paintings, etc.

Cache levels

For finer control, specify cache levels manually; the default value is 4.

• If you use relatively small files—roughly 1 megapixel or 1280 by 1024 pixels—and many layers (50 or more), set Cache Levels to 1 or 2. Setting Cache Levels to 1 disables image caching; only the current screen image is cached.
• If you use files with larger pixel dimensions—say, 50 megapixels or larger—set Cache Levels higher than 4. Higher cache levels speed up redrawing.

I hope that helps

[Alexey Novoselov]

Thanks for the quick reply, but this information is everywhere and there is no answer to my question. What's the difference between 1024k and 1028k and how does it work relative to retouching a large file? I must before the general correction to climb into the jungle of Ps and change the setting there? I think it works differently.

[DaveJCummings]

It all depends. The Cache Tile size sets how much data Photoshop uses at one time.  if its a smaller image, with a lot of layer, use the smaller one,  If you're using a lot of complex things,  the higher size might work for you,  but it would slow things down because of all the data its utilizing

[Alexey Novoselov]

Thank you. Okey, maybe I understand.

Than whats right settings to retouch like dodge and burn photo ~18-30mp? When most work is small corrention but with huge img?

And what diffirent between 1024k and 1028k tile size?

[Alexey Novoselov · Accepted solution]

Hi all,

Maybe this useful information: THE INDUSTRY — Cache Tile Size: 1024 vs 1028 Finally Explained!

“1024 should be fine for 99.9% of folks. The 1028 size was intended to work around a big performance problem with the Pentium4 cache architecture. Since most people shouldn’t have Pentium4 machines anymore, it’s not too useful. Some AMD processors may also be faster with the 1028 size, but we haven’t seen huge differences in performance on them.”

[Nahum Reduta]

Hey there! I wrote the reddit response in your last comment, but I'm really glad you found an Adobe scientist's response (Chris Cox) in the comment before. Finally, something conclusive we can all point to.

[Alexey Novoselov]

Hi all again,

This I found interesting too:https://www.reddit.com/r/photoshop/comments/7tsce0/cache_levels_tile_size_what_do_they_do/ 

When you use a mapping service, you'll notice that as you zoom in and out you're presented with different images. Photoshop does something similar with "cache levels". The image on your monitor is different from your actual working image, but is more easily presentable, especially as you use smaller zoom levels (where more canvas is shown).

Images are split up into "cache tiles" to make calculations easier in certain situations. Filters (which act on entire layers) may be quicker to run when large tiles are used, in order to have easier access to the entire layer. Meanwhile images with a lot of layers may benefit from smaller tiles (smaller parts to compose, more combinations of layer visibility to keep track of). You'll notice there are two "little" sizes and two "big" sizes. It is stated elsewhere that Intel CPUs prefer the smaller sizes (128k and 1024k) while AMD CPUs prefer the larger sizes (132k and 1028k). Unsure where this might be confirmed, but it's likely to do with how the two companies design their CPU caches.

So in my case, where I typically work with dozens/hundreds of layers on a 2–4MP canvas, I use few cache levels and small tiles (132k for my AMD CPU).