const compress/flate.BestSpeed

4 uses

	compress/flate (current package)
		deflate.go#L15: 	BestSpeed          = 1
		deflate.go#L590: 	case level == BestSpeed:
		deflate.go#L618: 	case BestSpeed:

	compress/gzip
		gzip.go#L20: 	BestSpeed          = flate.BestSpeed