What font are you using ?
I observed a little slowdown when using proportional fonts (last paragraph in
this issue on git hub) but for me it's a fraction of a second, or a few seconds if I'm running from the debugger.
Using another font will most likely make it load faster, but you might want to create a new issue on the 4coder git hub, and/or ask in the 4coder discord as Allen doesn't come here often.