One prompt fanned out to 21 analysts at once, folded through three domain reducers into one report. Run as a chain, this same work takes 392 seconds. Shaped as a graph, it finished in 85, 4.63× faster, nothing hand-drawn.
Source: a Claude Code Workflow run analyzing multi-agent graph engineering itself: parallel() fan-out across 3 domains → layered parallel() fan-in → one consolidation. Node size encodes real duration; positions are the run's true topology. Timings parsed from per-agent transcript journals; nothing is simulated.