P: Taking too long to start

Had the same extremely long delay with the "adding Halide Bottlenecks extension" on startup of Photoshop CC 2020 v21.2.1 after installing Topaz Gigapixel AI and Topaz Mask AI. I uninstalled them both and now back to normal startup. 

If you're still stuck, contact support directly and they can help you troubleshoot: https://helpx.adobe.com/contact.html

My problems started when I updated to Photoshop CC 20.01.1. It takes my PS 8-10 minutes to open. I have tried several things I have read in these threads. I do have a lot of presets and brushes. I will try to delete alot of the presets that I know I don't use, but I do use a lot of my brushes. It has been extremely frustrating especially since PS worked beautifully until my recent update. Mine lags on "reading preferences"

Any third party extensions? Is the splash screen showing when stalls on start?

Do you have a lot of presets loaded again?   You might try removing them all and adding them back slowly to see how your customary presets might be affecting load times. I'd include the default presets to see if they aren't part of the problem, too. They have to add to the load in addition to your own. Patterns are often very, very large, for example. I haven't checked on how large the shipping pattern sets are, but I know mine can skyrocket the overhead for loading presets. I have many that are large, not small repeating tiles.

I have heard that some antivirus software might also be a problem—in fact, I had a problem with mine (after 20 years of never having a problem), though it was interfering with something else. If you have it running always, have you tried temporarily disabling it before launch to see if that's it?

If you're sure none of that is it, Adobe might need to know what OS you're running in order to ask about other possible reasons for the slow down.

I am having the same problem. Reset the preset file and everything was fine for a couple of weeks and now, the problem is back. Also, PS is not freezing but rather taking forever to load.

Having the same problem here. Deleted extensions and reset profile and everything was good... for about a week. Now it's doing the exact thing again. Adobe need to figure this out and find a solution once and for all. Mid 2019 iMac with 40 GB or RAM. So annoying

My 2020 was loading in 5 seconds - yup I have an extremely fast windows pc.  The fault is definitely with other programs incompatibility as I have now loaded all of Topaz AI and Dxo Niks as well as a few others and - you guessed it - now take 30 - 40 seconds to load up.  For me it is a 3rd party fault

The fact that Photoshop pauses on Halide bottlenecks is a red herring. Most likely an overly large preset file.

Hi Daniel - it definitely is for me, even more so than with 2019. Funnily enough I tried/risked making your suggested change to the InDesign file and Photoshop loaded in 5s on it's next load. Could just be a random coincidence or perhaps somehow tied to a core cloud function (??) but thanks to James' help I have now located the Photoshop file and made the change. Out to 10s but a vast improvement.