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catalyst/zipline
Andrew Daniels 6dd1616c15 PERF: Use scalar lookups for TradingCalendar.schedule
When retrieving the open and close for a given session, we only care
about the scalar values, so using DataFrame.at instead of DataFrame.loc
is significantly faster.
2017-04-10 17:23:07 -04:00
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2016-09-20 17:12:07 -04:00
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2017-03-07 17:14:27 -05:00