Same problem here. Illustrator 24.2 (64 bit).
Even with a blank document zoom in/out with overprint preview off is instant.
When i activate overprint preview it takes 3-4 seconds to zoom in out.
Problem appear only working on display resolution above 4k on a last generation pc on a 6 year old mac with 2k monitor everything is perfect.
It appear the illustrator has some serious compatibility issues with some CPU/GPU.
Adobe should provide a strict list of hardware that is compatible with their software because is ridiculous to invest maybe thousand of dollars in one only to find out is not usable and a 6-10 years old computer works better

There is some problem with Overprint preview turned on, everything becomes verry laggy. I'm on iMac 2019 27" with 40gb of RAM, SSD drive, no plugins. No matter which document is opened, the problem is same - very slow illustrator movement.

Only sollution is to run Illustrator in Low Resolution mode, then the problem does not exist.

Can we get a fix on this - literally no designer worth their salt uses 1920x1080 anymore.

Hey guys, I have the same issue with very laggy over print view and very big latency with transforming rectangle, circle or other vector shape. The line of the vector is far behind the cursor... you feel some kind of delay... and not smooth moving over the canvas by hand tool. here I record the video with this problem: https://youtu.be/mtCttOjDMeM

Specs:
iMac 5k 2019 i9
Vega Pro 48 8GB
16GB RAM
1TB SSD
OS: Catalina & Mojave

Hi Guys,

I got help with this issue from an online session from the peeps over at Adobe. i'm using Illustrator 20.0.1, with a 2019 16' MacBook Pro, Mac OS Catalina 10.15.2.

I spend most of my time in overprint too, and apparently Adobe is backlogged with other bugs and working their way to this issue. In the mean time, they suggest either not working in overprint, or if you have to, press CMD+Y to go to line mode when in overprint to avoid the lag.

The issue is due to legacy software changing up to a 64bit systems. So yeah, guess we're stuck until Adobe solves this.

I bought 46 (Yes, Forty-Six) i9 Apple laptops with paired 32" Asus ProArt 4K monitors. I've included the hardware specs below but we are having the same/similar Illustrator (CC2019) issues. General functionality is impacted by slowness/delays on moving objects, manipulating paths, moving the canvas around, etc.

I have also found that it appears to stem around high resolution display settings. Using the 4K monitor but dumbing down the display resolution lower than 1080 gives a lot more fluidity and the issue is almost not apparent however, going above 1080 resolution triggers the issue. The delay also gets gradually worse the higher the resolution you set. Forget using your new 4K monitor at that resolution!

Also, the delay gets worse as your file grows too! The increasing number of points/effects/art boards/layers/etc all start to contribute lengthier delays. This is not experience of one artist, it's all of them! Fresh installs of Mac OS and Adobe Software, wouldn't be an "upgrade" issue here. To help determine these issues, we have: disabled “Print Preview”, tried GPU/CPU processing, disabling OS dictation, reset preferences, swapped out for 24” 1080 dell generic monitors, etc.

I’ve tried to troubleshoot to the fullest extent. I honestly believe there is an issue with Illustrator at higher resolutions. Adobe, I hope you are listening because this issue has cause me (as IT) a huge headache, has everyone questioning the awesome gear I bought for them AND causing much frustration amongst all my artists. Many artists now have their unused/unplugged color calibrated, high-quality 32” 4K monitors collecting dust behind a crappy 24” generic monitor because of this issue.

Hardware/Software:
Model Name: MacBook Pro
Model Identifier: MacBookPro15,1
Processor Name: Intel Core i9
Processor Speed: 2.3 GHz
Total Number of Cores: 8
Memory: 32 GB
MacOS: 10.14.6
Illustrator Version: 23.1.1
Monitor: Asus ProArt 32 PA328Q

Hello,
I have the same problem here (Illustrator V 21.1.0) 64bit - Windows 10 pro
System:
AMD Ryzen Threadripper 1920x
32 gb DDR4
RX 580 8gb DDR5 video
M2 Samsung SSD 970 EVO HDD

It all started when I upgraded my old ultra wide 2560x1080 monitor to a full 4k display.
On the native 4k resolution all zoom in/out operations with overprint preview on take 3-6 seconds and freezes the system.
If I change my monitor resolution to lower values(1920x1080 for example) everything is back to normal and working fast.
It seams all the problems are related to high resolution (4k and above) and is relative old problem.
If anyone found a fix for it can you please post it here because i could not find it.

PS.

Activating or not GPU performance at least in my system case does not have any impact over this bug

Hi,

I just got a brand new iMac (iMac (Retina 5K, 27-inch, 2017) ) with illustrator CC all up to date and every time I put the overprint preview on, illustrator get very slow.

I recently try to get help from Adobe support team, but they could'nt fixe the issue! Anybody can look into this?

Also, the file size doesn't matter, whatever I try in a simple or more complex file the overprint preview always slow down illustrator greatly.

Thanks,