I've run two optimizations with 50 and 1000 as "Kepp best # of results" values with intra day bars and a YTD range (88000 combinations), no other parameter changed.
The time increases from 20 minutes to 1 hour and 15 minutes with 1000 results.
There is plenty of RAM still available. I naively assume that backtesting is far more computationally expensive than filtering which results to keep based on 1 metric.
Unfortunately I couldn't find more information on the topic via the forum search.
Maybe this could be improved in a future release?
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