Solved by IvanKobzarev in post #2 
              
              
                Hello @Chame_call. 
At the moment pytorch android thread count is fixed by device and equal “number of big cores of cpu”(N) on device. 
As you also have bg thread for image decoding + UI thread - at the moment of inference you have at least (N + 2) competing threads for N big cores (+other applicati…