better ram usage to improve playback on timeline
I have noticed that most of the playback lag in the timeline is during the transition between segments. it also does not load all segments of the timeline into ram. this causes considerable lag as it has to go fetch and load the data into ram rather than keeping all the data in ram. A feature such as setting a ram cap/allowance will maximise the amount of media that can be loaded into ram. Thereby reducing the lag. The cap feature would allow performance tailoring to machines that have more ram but a weaker CPU, as a bonus it should reduce the load on the cpu a little bit.