performance drop when migrating from 5.3 to 5.4

hi

i am seeing a performance drop when migrating a project to and working in unreal 5.4 compared to unreal 5.3
unreal 5.4 is so slow that i decided to move back to 5.3
running windows 10 with a lot of memory
is the system requirements difference between 5.3 and 5.4 so great that i would be able to run 5.3 but not 5.4 on my pc, or is it perhaps something else?

thanks

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Maybe you should turn off Lumen (It take a lot of ressource). It somewhere in the project setting, but I don’t remember where precisely

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i have now turned off lumen to see what the outcome is
it seems faster
yet the initial lag is still there
there seems to be a lag between keyboard and mouse input and a response in the editor
sometimes it is so bad that it makes using the editor unrealistic

will see if it is the same with 5.5 as well or not

it seems ok in 5.5 so maybe my 5.4 corrupted