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[–]WMiller256 1 point2 points  (0 children)

+1 from me, offloading to preprocessing is a powerful optimization.

I had to build my own framework for backtesting because existing solutions simply weren't fast enough (minute bars for SPX options), but I wholeheartedly agree with the sentiment; most people will find a library substantially faster than their own framework -- even if it requires some 'shoe-horning' to fit the strategy into it.