Prevent user from holding keydown for too long or repeated same key

[mohfathy0]

I am developing TV app with low CPU
When holding down arrow key or press too many times on the same key the app takes time to handle the navigation between the elements especially if there are images within I couldn't figure out how to handle long press or maybe skip additional repeated keydown event to let the browser process what happen and maybe scroll if needed
Any idea how to do that?