Suspending Unity Temporarily during high CPU processing

Hi,

I am using unity with a custom library on iOS. The custom library is a mathematical lib with a few threads and calls to DSP functions of the iOS. If I use the library with a native iOS app the performance of the library is 2-3X better compared to running under unity. I suspect, unity is using a lot of CPU cycles and as a consequence the libraries execution time is longer.

Is there a way I can stop/pause/suspend Unity functions for a very limited time so that I can prioritize the library execution? I am ok to make the system unresponsive to user input and possibly stop frame rerest as well. If this is NOT possible, what other approaches I can take the enhance my performance.

Thx,