Performance
Manage memory with many Spaces
Keeping ten Spaces open isn't a problem if most are idle.
1 min read
Spaces you aren't using don't consume much memory. Step lazy-loads tabs as you switch in, so the cost of an idle Space is roughly its database row, not its full tab tree.
How idle Spaces behave
Idle Spaces release their renderer processes within minutes. Switching back into one re-uses cached state and is usually instant.
Inspect memory usage
Open Settings → Performance → Memory inspector. Step shows per-Space and per-extension memory.