I don’t mean typing directly, but mainly deleting and editing text. When you press the Backspace key, hold it down and wait until it starts to repeat. This interval can be shortened to a minimum, which saves time in the long run but especially does not delay you with awkward waiting. In addition to the Backspace key, you can also use the cursor arrows when moving through text.
How to shorten this interval? Let’s assume you are using Windows 10 (but it’s the same on older systems). You can find the option in Control Panel -> Keyboard. Simply set both sliders all the way to the right. You will see how much better you can type right away.