Causality / Parallelism
Kind: tension
Record: tension:causality-parallelism
Canonical: Schema
"causality" (causality-core layer) is traded against "Parallelism" (performance-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Parallelism" and choosing an explicit operating point.
Listed in Tensions, after Runtime Extensibility / Security and before Causal Consistency / Latency/Availability.