Photoshop CC 2019: Why are histograms being rebuilt every time I switch between document tabs?

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  • Problem
  • Updated 1 year ago
  • (Edited)

I have two documents open. The primary doc is sort of big - 1.3GB - and the secondary doc isn't exactly small - 895MB - but I routinely work on much bigger files and have never had the issue until the 2019 update. No 3rd party plugins are installed.



When I use the tabs at the top of the work area to switch from the smaller doc to the larger main doc it slowly rebuilds histograms every time. Even when nothing has been done since the last switch - just the act of switching triggers the wait bar. It's a huge momentum killer since I pop back and forth between multiple documents constantly. One note: The main doc that triggers the rebuilding was created in CC 2019, while the other doc was created in CC 2018. Switching from the 2018 doc to the 2019 doc triggers the rebuild, while switching from the 2019 doc to the 2018 doc does not. 




No 3rd party plugins are installed.


My System:


Model Name: MacBook Pro

Model Identifier: MacBookPro13,3

Processor Name: Intel Core i7

Processor Speed: 2.7 GHz

Number of Processors: 1

Total Number of Cores: 4

L2 Cache (per Core): 256 KB

L3 Cache: 8 MB

Memory: 16 GB

Boot ROM Version: MBP133.0247.B00

SMC Version (system): 2.38f7


Photo of Matthew Hales

Matthew Hales

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Posted 1 year ago

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Photo of Jeffrey Tranberry

Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Is the Histogram panel open and visible in your workspace anywhere (second screen)?

I see you do have a few 3rd party panels installed. I've seen cases where other 3rd party panels trigger histograms excessively:

Try going to Preferences > Plug-ins... and uncheck Load Extension Panels. Then restart Photoshop and see if the problem persists.