when I add color lookups photoshop crashes for 1 minute, it's very hard to experiment with color lookups, because every time I switch in color lookups I have to wait 1 minute, this problem happens after updating to CC 2017.
Please update Photoshop to the latest version 2017.1.1 also, you may try and reset the Photoshop preferences back to defaults.
Refer: Preferences in Photoshop
Let us know if that helps.
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