if len(b.output) > 0 {
				b.trimOutput()
				fmt.Printf("--- BENCH: %s\n%s", benchName, b.output)
			}
			if p := runtime.GOMAXPROCS(-1); p != procs {
				fmt.Fprintf(os.Stderr, "testing: %s left GOMAXPROCS set to %d\n", benchName, p)
			}
		}
	}
}

// trimOutput shortens the output from a benchmark, which can be very long.
func (b *B) trimOutput() {