Race

Concurrency

flow.raceRuns each connected branch concurrently and continues as soon as the first one finishes (Task.WhenAny). Binds the winning branch index to 'winner' and cancels the losing branches.First-past-the-post over up to four branches; losers are cancelled.

Inputs

Name	Kind	Type	Flags
in	Exec	exec	multiplexed

Outputs

Name	Kind	Type	Flags
branch0	Exec	exec	None
branch1	Exec	exec	None
branch2	Exec	exec	None
branch3	Exec	exec	None
winner	Data	System.Int32	multiplexed
completed	Exec	exec	None

Lowers to C#

var winner = await Task.WhenAny(branch0(), …); cts.Cancel(); /* → completed */

Used in

Take whichever lookup answers first (Example)