DMD2 4x4 display

[Ahmed1]

Good day gents
I'm recently used DMD2 library
I connecting 16 DMD,P10 with Arduino Uno
4 width, 4 height
It's working but the speed of Arduino is slow
The speed of changing is taking delay
1.Any help to faster the rate of changing ,make Arduino faster
2.when make serial communication with another Arduino the Rx TX take long delay time
Any help with this issue also

Thanks
Ahmed