I’d be taking the traffic into consideration as a first (depending on where you’ll be travelling from, things could get quite ‘messy’ but I’m sure you’re planning ahead and accordingly) whereas, in regards to security/passports, there are times when it’s extremely quiet (recently, an hour before my flight, was through in seconds and thought I was pushing it to get to the airport so ‘late’), but I’ve also seen ridiculously long queues. If you want to grab a drink at the lounge and chill out a little bit before boarding, I’d say an hour and a half will do smoothly.

G