^^^ The pre-check line tends to be pretty short though, at least for Terminal 4 Southwest gates. I’ve seen a lot of variation with the regular lines, anywhere from huge to short depending on the day and time.
FYI for terminal 4, all the gates are accessible once you get through security even though there’s 4 distinct security checkpoints. If one checkpoint is crazy long, just go to a different one although it’s a shorter walk to stay on the same “side” checkpoint vs going to the one that’s directly opposite as that might make for a much longer walk post-security. A and B gates are on one side, C and D gates on the other. The further apart the letters are in the alphabet, the longer the walk post-security.
Just last month I saw a crazy long line for the A checkpoint, when just a 3 minute walk away people could go through the B checkpoint with very short lines and still easily reach their gates.