snapshotlistener

问题 I want to be able to stop snapshot listener when I don't need to listen for changes so later I can get all the updates at once. Is it possible to temporarily halt the snapshot listener? I think you have to remove it explicitly and reinitialize everything according to the doc. So I can explicitly call remove and reinitialize the snapshot listener to get changes, but is there a price penalty for doing this? I know reading cached values within 30 minutes doesn't cost anything, so does this mean

问题 I want to be able to stop snapshot listener when I don't need to listen for changes so later I can get all the updates at once. Is it possible to temporarily halt the snapshot listener? I think you have to remove it explicitly and reinitialize everything according to the doc. So I can explicitly call remove and reinitialize the snapshot listener to get changes, but is there a price penalty for doing this? I know reading cached values within 30 minutes doesn't cost anything, so does this mean