Is there any way to stop previews from live updating? It's constantly running and that's nice when I'm developing, but I'd like it to pause updating when I'm not using the Xcode. It heats up my m1 air and drains unnecessary power reducing the battery levels significantly.
You might try to hide the preview pane: Editor > Show Editor Only
(And use Editor > Canvas when you want the Preview pane to come back.)
I don't know if this will stop the preview updating, or if it will continue running and just not show it. But it is something quick you can test.