Achieve better performance when modifying state of a Matlab class.

I have the following class definition

classdef State < handle
    properties
        R=0;
    end
    methods
        function inc(C)
            C.R = C.R + 1;
        end
    end
end

and I perform the following test

M=10000
tic
x = State();
for i=1:M
    x.inc();
end
toc

tic
x = State();
for i=1:M
    x.R = x.R + 1;
end
toc

The first run in about 0.04 and the other in about 0.006 so there is great difference in performance and possible room of improvement. My question is there a way to achieve better performance in this example assuming I want to encapsulate the behavior(R must be private)?

For a real world setting you can assume my class will have more state variables which will also be vectors (still private) and inc function will be more complex.