const compress/gzip.BestSpeed

3 uses

	compress/gzip (current package)
		gzip.go#L20: 	BestSpeed          = flate.BestSpeed
		gzip.go#L164: 		} else if z.level == BestSpeed {

	runtime/pprof
		proto.go#L254: 	zw, _ := gzip.NewWriterLevel(w, gzip.BestSpeed)