Vim define a macro (stored in q because it is easiest, but to change the name replace the second q with any letter):

  qq<do stuff>q

Emacs define a macro:

  C-x ( <do stuff> C-x )

Vim do that macro again 40 times:

  40@q

Emacs do that macro again 40 times:

  C-u 40 C-x e

Naming a macro in Emacs (so you can have multiple) takes even more keystrokes and I'm not entirely sure on the incantation to repeat a macro from name - none of the help files seem to tell me how to do this, only to save it.