Here's a book by Ken Dancyger, The Technique of Film and Video Editing: History, Theory & Practice from Focal Press.
A preview is available on Google Books
Here's a short excerpt on editing for comedy:
"In terms of editing, the key is enough screen time to allow the performance to convince us of the credibility of the situation. The emphasis throughout the scene is on the character's reaction to the situation, allowing us to follow through the logic of the scene. In every case, editing is subordinate to setting and performance. Pace is not used for dramatic purposes. Here, too, performance is the key to pacing."
This short excerpt from Chaplin's Modern Times illustrates the point:
The book is full of useful information so check it out.