My understanding is that constraint based layout performance is heavily dependant on providing lots of constraints so that the solver doesn't have too much work to do. But that the reason people like constraint-based layout models is that they don't have to provide many constraints.
Couple those together and you get poor performance. Or more specifically, unpredictable performance with lots of performance pitfalls that are hard to debug. Apple's AutoLayout is the real-world case study for this.
alt Hacker News
My understanding is that constraint based layout performance is heavily dependant on providing lots of constraints so that the solver doesn't have too much work to do. But that the reason people like constraint-based layout models is that they don't have to provide many constraints.
Couple those together and you get poor performance. Or more specifically, unpredictable performance with lots of performance pitfalls that are hard to debug. Apple's AutoLayout is the real-world case study for this.