Why is performance on establishing a matfile object poor?

Hi everybody,

I need a bit insights about matfile objects.

So the background is, I have a matfile containing several tall arrays (386 files) (matfile has a size of about 4.6 MB).

I use

data = matfile('MEA.mat');

to establish a matfile object on the MEA.mat file. It takes about 10 minutes.

So I wonder why it takes such a long time. Or is it long at all? I wonder how MATLAB proceeds on establishing such an object, and where is the bottleneck.

Thank you a lot for helping hints and information!

Eva