Make After Effects Roto freeze instantly

I wonder, why does Rotobrush do a recalculation when you hit Freeze? What is the process behind it? What is the point? The tool isolates an object once then it does it again. Nothing changes before freezing. If you change any values it does not infleunce the freeze-unfreeze time if it once was frozen so what is the point of recalculation of the first freeze? Is there a chance Adobe will make Rotobrush take one pass of rotoscoping instead of two? Because it is really so tedious ro see it do it twice and it takes so much time.