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Premiere UI freezing, "Main Thread Blocked for X seconds."

New Here ,
May 26, 2021 May 26, 2021

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Hi, has anyone experienced anything similar?

I've been having this issue with a larger project (~100MB) that I upgraded from Premiere 14.x to Premiere 15.x.

The interface is super-laggy and freezes almost after any action (seeking, resizing windows, selecting text, etc.).

Every time the freeze happens, the console shows a new message, like this:

<708760> <MZ.MainThreadHangMonitor> <5> Main Thread Blocked for 7.13419 seconds.

I switched off Metal in the Project settings, but same thing happens.

 

The weird thing is that for other (smaller) projects I didn't experience any problems at all with upgrading them.

Thanks a lot!

Andris

 

I'm on a iMac 2020

3,8 GHz 8-Core Intel Core i7

AMD Radeon Pro 5700 XT 16 GB

32 GB 2667 MHz DDR4

Big Sur 11.4

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Freeze or hang, User interface or workspaces

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New Here ,
Jun 30, 2021 Jun 30, 2021

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Came here to find solution to the same issue on a MacBook Pro 16" i9.  Beachball every couple of seconds and same error in console.  

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