const bytes.MinRead

4 uses

	bytes (current package)
		buffer.go#L193: const MinRead = 512
		buffer.go#L202: 		i := b.grow(MinRead)

	crypto/tls
		conn.go#L805: 	c.rawInput.Grow(needs + bytes.MinRead)

	google.golang.org/grpc
		rpc_util.go#L743: 			buf := bytes.NewBuffer(make([]byte, 0, size+bytes.MinRead))