Some Kyle T. Webster brushes extremely laggy in PS 23.2.2

Like @davescm, I did some comparative testing of my own between Photoshop versions 20.0.7, 22.5.4 and 23.3.  Using mouse, Modifier Keys panel (double-click Shift to lock it), doc size mentioned above, click once top left, move mouse to bottom right corner, click and start clock at the same time, stop timer when stroke reaches cursor location (repeated 3x).  Made sure Rulers were not shown and workspace (panels shown) was the same. Results:
20.0.7: average time was 5.5 sec
22.5.4: average time was 7.7 sec
23.3: average time was 6.3 sec
* Timing and performance will vary per machine/resources.

Here area a few things you can tweek to improve speed:
In Brush Settings panel > Brusth Tip Shape: increase the Spacing.
Sometimes hiding certain panels can speed things up (i.e. Navigator, Brush Settings, etc)
Turn off or lower Smoothing
Switch from 16bit to 8bit (I realize this might be a deal breaker). 
Different zoom magnifications can affect performance

Hi Mark

I'm using 23.3 and repeated Jen's canvas size, zoom level, brush and brush size. To make a repeatable test I clicked at top right of the canvas then shift clicked bottom left and measured the time with the timer in the info panel. 

The result was 1.6 seconds.

Turning off rulers , still gave 1.6 seconds

Turning off scattering for that brush gave 0.7 seconds.

In this case it just looks like the complexity of that particular brush / brush set.

Dave

@Mister_M3780 , @davescm , does it help to turn off the rulers? We are actively investigating some ruler performance issues and this might be temporarily resolved by turning those off.

Also give this a go with 23.3 (just released); we also had some brush improvements included in that release.

Hi

I have a similar system (Intel i9-10920X 3.5GHz Processor  ; RAM 256GB DDR4 3600 ; GPU RTX3090 24GB VRAM;    M2 Drives Wacom Intuos Pro tablet)

I do see a delay when zoomed out to similar levels on your highlighted Kyle Natural Feel brush. But looking closely at the way the brush is made, unchecking 'Scattering' removes that delay entirely. I would suggest that brush was designed by Kyle for closer work, as when zoomed to a smaller canvas area no delay is seen.

Dave

Hi Dave,

thanks for your answer. I used the "Kyle's Paintbox - Natural Feel Special" in my demo. But there are several brushes, which are more or less useless on my system because of the severe input lag. Especially the "Natural Feel" brushes in the Paintbox section have this massive lag.

The canvas settings are according to my photos right out of my camera:

Width: 5504 Px

Height: 8256 Px

Resolution: 300 ppi

Color mode: RGB 16bit

Color profile: Adobe RGB

Thanks for your help. Much appreciated!

Best regards,

Jens

Which brush are you using in your demo and what size canvas (so I can test here)

Dave