Has nonody here used Backtrader with large datasets? What size of data are people working with, and how well does Backtrader handle the biggest you've used?

I'm working on a Quantopian-like platform and Backtrader seems to be a top alternative to Zipline. The main concern I have is how would it handle multiple users running backtests against Quantopian levels of data (estimated at 1 to 4TB)? There are 2 areas of concern, one being loading all that data (for Zipline it seems it has to be done every run), and the other being the CPU load.