MATLAB: Get available memory from Windows 7 64bits – and fast

Question

Background: I run performance test on reading HDF5-files. The spread in the results are large and I cannot understand why. Now, I try to figure out if HDF5 has a huge hidden cache in memory. Slow reading is correlated with low cpu load and vice versa. Now I plot "memory use" during reading together with other quantities. I guess I cannot read "disk access intensity".

Execution of the function, memory, takes 0.04 seconds per call.

    [ ~, system_view ]  = memory;
    timing( 5, jj )     = system_view.PhysicalMemory.Available;

Making a DOS-call to systeminfo is also slow.

Question: Is there a fast way to get "current memory use" by both Matlab and HDF5?

Answer 1

Perhaps:

feature('dumpmem')
feature('memstats');