Possible solution for slow operation (Windows)

[Ted32211121l5mq]

Forget all the optimizations that Adobe proposes. Nothing helps! If your Lightroom is absolutely slow then take a look at the task manager. There you can see that Lightroom only accesses a single processor! Things get slow with single core!

What do we do under Win 11?

MSCONFIG -> START tab -> Advanced options Specify the number of processors in your CPU.

Restart! Now, Lightroom is running fast again.

You can reset the option to default if you uncheck “manually specify the processors”.

Good luck! 

[D Fosse]

I don't know how you got Lr to use only one core, but this is what I see under normal operation:

[Ted32211121l5mq]

It's a bug! I dont want that either! Take this info or leave it...

[Keith Reeder]

No it isn't. It's a badly configured PC.

[Ted32211121l5mq]

And why do you think posting a screenshot of your taskmanager help? WTF?

[D Fosse]

The point I'm trying to make is that whatever happened on your system is unique. It's not a normal situation that users are likely to encounter. I wouldn't advise users to tinker with advanced Windows settings without knowing what they're doing.

[Keith Reeder]

"Forget all the optimizations that Adobe proposes. Nothing helps!"

Yeah, unsupportable sweeping statements always help.

This might have fixed your machine, but that's just an indication that there was someting wrong with it before LightRoom arrived on it.

As D Fosse points out (clearly enough not to warrant or need the "WTF?" from you) the normal state of affairs is what his screenshoot demonstrates, and whatever weirdness is confronting you is your weirdness.