If you have AutoHotKey installed, just download the script and double click it to activate it. When active, holding space will rapidly repeat the input. Close the script when you want to deactivate it, it'll pop up in the bottom right on the taskbar, click the upwards arrow down there if it's not. (This is on Windows, I dunno for other systems).
I don't know how to write AutoHotKey scripts, so I edited one I Googled. For this reason, the script might suck and be a stupid way to do this, but it works. You can see exactly what it does by right-clicking the file and clicking "Edit", the script by itself is down below if you just want to copy and paste it into an AHK script rather than download it. Otherwise, here's the link.

https://drive.google.com/file/d/1NCz52tm-sEjE7mleOIYahCEgcGUy-KeJ/view?usp=sharing

$Space::
Loop
{
if not GetKeyState("Space", "P")
break

send {Space down}
sleep, 10
send {Space up}
}
return