Some Apple ][ games are that way.
Has to do with quick polling of the keyboard.
You'd think the programmers would use a different routine, or delay the polling. I believe it's just an unfinished keyboard/joystick conversion in anycase.
The best action games could be from Br0derbund or Sirius. And then you have these on-offs. The earliest action games came from Bill Budge, didn't they? Then there's PhazerFire and StarMines. Starblazer was among my favorite. And then Eliminator, an unusual release because it came from A.I. I also liked SpaceRaiders. It had one of the noisest titlepages around. Damn!
All the Tempest clones like Axis Assasin were slower than shit in a stuffed toilet.. What was the other clone?