Panning camera with keyboard choppy

When panning the camera with the keyboard it's noticeably choppy (like a micro stutter, not a big pause). When panning with the mouse it's nice and smooth. I have minimal game dev experience but it feels like it's re-reading the keyboard input each time for the long keypress or possibly moving a set amount before checking it needs to keep moving. I tend to use the keyboard to move the camera and it's very distracting in comparison. So I guess this is a suggestion to tighten the keyboard camera pan / rotation so it's similar to the keyboard.