Accelerating MATLAB Performance

200 Accelerating MATLAB

®

Performance

function value = getSize(obj)

value = obj.Width * obj.Height;

end

end

end

function value = getSizeExt(width, height) % regular m-function

value = width * height;

end

C = TestClass2;

tic, for idx=1:1000; v = C.getSize(); end, toc

⇨ Elapsed time is 0.024017 seconds.

% getSize(C) is 1.3x faster than C.getSize()

tic, for idx=1:1000; v = getSize(C); end, toc

⇨ Elapsed time is 0.018949 seconds.

% getSizeExt() is even faster (7x)

tic, for idx=1:1000; v = getSizeExt(C.Width,C.Height); end, toc

⇨ Elapsed time is 0.003361 seconds.

% Avoiding the function call is the fastest alternative (1100x faster) ...