Thank you @Nico_S .
That could be the reason for the problem.
I did that, but when I look at Bricks → “System Information” the memory limit is still 40MB ?
Might it be that your hosting company will not allow this to be changed from the default?
no changes with 2056mb assigned… 
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put it at the beggining of the php file not at the end.
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You are awesome, with your tip I was able to increase the WordPress memory limit now.
Thank you very much!
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Yep. I was not seeing this but now the editor becomes more and more laggy.
I have to restart the editor to clear.
Yep, using ACSS and Frames.
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Hi guys,
Bricks 1.7 beta, now available as a manual download in your Bricks account » Bricks – Account , contains a fix for this massive issue.
Let me quote from the changelog:
Builder Lag On Complex Pages
Users working on complex pages (plus a lot of global classes) often experienced a serious lag while editing in the builder. 1.7 comes with a completely overhauled logic of how the state of elements and classes in the builder is updated, which should remedy this sort of lag.
Due to the nature of this change, please inform us immediately (via email or the forum) if editing elements or global classes in the builder, or using the undo/redo feature is causing any issues.
Best regards,
timmse
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