This movie is unfortunate, because it ignores the elements that made the stage version so intense without replacing with anything else.
The stage version of the show runs in real-time. You watch the singers/dancers do the first number, after which they go through an initial cut down to "the line" of hopefuls, and then watch as each presents himself/herself to the casting director. The intensity of the stage show is that those folks on stage remain there, leaving once or twice, but largely, they stare back at you and don't leave. You stare at them, and it gets scary. Just like an audition.
The movie tries to "open it up" by messing around with the pacing and timelines. There are flashbacks, people arrive at different points into the audition, there is footage included from outside the theater. Worse, the concept of "the line, no stars" from the show is lost in a poor subplot involving the director and one older dancer. (Yes, in the stage version that subplot's there. It's not the focus of the show, however, and the single top-10 song from the show, "What I Did For Love", is stolen from its focus about the love of dance/art and used in this wretched context instead.)
Do not see this movie before seeing the stage show.
It's considered, by Broadway types, to be the worse movie adaptation of a Broadway show that's been done. (Oliver and Chicago are the opposites, both adapting the shows excellently without being a simple film of a stage production.)