Render Question

If I am rendering audio through plugs, how does reaper or other DAW's do that at faster speeds without messing up reverb tails and dynamics processing? It seems to me that it would have to be done in real time to be done accurately. Secondly, has anyone done null tests with render files VS. open projects? Just thinking over things and appreciate your wisdom. Rob

I am not trying to insinuate anything against reaper... I am a reaperite. Stability with plugs has been my only issue and it is mostly good. This is just random thinking about DAW's in general and coming from a DAW that only renders real time "live" The question was just buggin me. Thanks

Thanks for the posts. Limited experience, such as mine, creates a narrow mind and doubt from time to time. It seems you both have a larger perspective and I appreciate it.