Guy Lodge Film Critic In a genre not traditionally given to brevity, James Marsh‘s literary biopic “Dance First” at least has that on its side: In 100 minutes, it races through the key events and alliances in the life of Irish author and dramatist Samuel Beckett, even finding time for some metaphysical musings alongside the cradle-to-grave checklist. But Beckett’s characteristic terseness — or radical “lessness,” to borrow a title from one of his stories — isn’t a feature of this creditable but ponderous film, which ultimately achieves its efficient runtime by skirting any meaningful engagement with Beckett’s work and literary legacy.