fix: lazily connect derievds (in deriveds) to their parent #15129
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🦋 Changeset detectedLatest commit: 1867f40 The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
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Tried version from this PR on our codebase. The issue is fixed. Also I clicked through the app and there are no observable regressions otherwise from the first glance. Thank you for digging into it and your swift fix! |
Rich-Harris
approved these changes
Jan 28, 2025
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Fixes #15111.
We don't need to eagerly connect deriveds to their parents – we don't do this in effects, so we can apply the same heuristic here too. If we lazily do it upon read of the derived from within a parent derived. If no read is done, we skip pushing it into the children. This will avoid the buggy case linked, and also provide a nice performance uplift by avoiding array allocations for cases where don't need to do them.