Speed of solver decreases in a parametric loop MATLAB

Hey all,

I am new to comsol. I need to study effect of a parameter in a eigenfrequency problem. In MATLAB, I solve the problem for each value of the parameter (say for eg say some geometric parameter). As the parameter progresses, I observe that the speed of the computation decreases. I am using COMSOL 4.2 a with MATLAB R2016.

Can anyone tell me the cause of it and suggest any solution to maintain atleast a constant speed of the solver as the parameter progress ?

Any tips in increasing the speed of the solver are also welcome.

Thanks in advance

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Tarkes