Basically the title says it all. If your trying to save up evolutions to do them during a single lucky egg, how many evolutions can one do in a 30 min period to maximize the time of the egg?
Depends on how fast the game runs on your phone, but following this video
20 seconds for the evolution animation
6 seconds if it’s new and being registered to pokedex
And some time inbetween. If we say you’re fast and can get to the next one in on average 6 seconds (I assume many of them would be the same, ie. pidgeys)
If we then assume the pokedex wont be a problem;
26 seconds each
That gives ~69 evolutions, provided it’s the same for all pokemon.
Less if you gotta deal with the pokedex