Accelerating MATLAB Performance

195MATLAB

®

-Specic Techniques

end

end

% Concrete singleton implementation

% Note: this is deliberately placed *outside* the class,

% so that it is not accessible to the user

function obj = getInstance()

persistent uniqueInstance

if isempty(uniqueInstance)

obj = Widgets();

uniqueInstance = obj;

else

obj = uniqueInstance;

end

end

Another consideration when designing classes is that while handle classes are slightly

slower to create (due to multiple super-class overheads), they are typically much faster to

use. The reason is that handle classes are passed to functions by reference, whereas value

classes are passes by value