Parallelism / Coordination Overhead
Kind: tension
Record: tension:coordination-overhead-parallelism
Canonical: Schema
"parallelism" (performance-core layer) is traded against "Coordination Overhead" (execution-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Coordination Overhead" and choosing an explicit operating point.
Listed in Tensions, after Concurrency / Complexity and before Throughput / Latency.