I rendered this scene in an hour, but in V-Ray 7, it takes 3 hours to build the light cache and 5 minutes to cancel the render. Nothing has changed except for V-Ray 7. I had this issue with V-Ray 6 but worked with support to solve the problem. Those fixes were supposed to roll over to 7.
https://app.screencast.com/arXrlLzMGGRP9
https://app.screencast.com/arXrlLzMGGRP9
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