Hal Roach — American Producer born on January 14, 1892, died on November 02, 1992

Harold Eugene "Hal" Roach, Sr. was an American film and television producer, director, and actor from the 1910s to the 1990s, best known today for producing the Laurel and Hardy and Our Gang film comedy series... (wikipedia)

The important thing, once you get 'em laughing, is to keep 'em laughing until you're through. With a 90-minute feature, you've got to stop the laughter and then pick it up again, which is tough.
Harold Lloyd was not a comedian. But he was the finest actor to play a comedian that I ever saw.
The greatest comedies that were made by anybody were made in two reels; I don't care who it was.
You can't make people laugh for more than half an hour and be consistent.