It depends on how much history there is.
In the example of the previous answer, loading the file with history would be fast, but managing the scene by Maya would be a bit slow (because of the recreation of all the steps).
Without the history, Maya would load the file slower (because of the bigger amount of data). The managing of the scene would be almost the same, because Maya doesn't have to recreate all the steps, but it has a bit more data to manage.
When you have an heavy scene, with much history, the time used for reacreating all the steps would be much higher than the time used for managing only the resulting data.
So, for simple scenes it doesn't matter if you keep the history, but for very large scene you should keep your work clean and without history (if you can).