- Reduce the amount of `Path.Combine()` usages -> it has a peformance
overhead
- Improving `FineFundamentalSubscriptionFactory` GetSource algorithm,
now it will not check if each file exists while finding the appropriate,
since we already iterated the directory before
- `DefaultDataProvider` will not check if file exists since `new
FileStream` performance the same operation internally
Previously the enumerator would get stuck and stop emitting data if one of the underlying enumerators returned a data point with the time greater than the current time. The existing unit test would only emit the first data point for the two underlying streams.
The enumerator has been updated to support data points in the future and the unit test has been extended to assert both data point counts and values.
- Adding `IRealTimeHandler.OnSecurityChanged()` will be used to update
the `OnEndOfDay` security related scheduled events
- Adding `BaseRealTimeHandler.cs` to reduce code duplication in the
`Backtesting` and `LiveTrading` `RealTimeHandlers`
- Adding CSharp and Python regression tests
- Deprecating `OnEndOfDay()` callback because of two reasons, mainly
because Python does not support two methods with the same name, but also
because different assets have different market close times.
- `ScheduledEvents` set at the same time will now be deterministic
- Adding new `StepTimeProvider` that will advance time based on a
desired custom evaluator.
- Live trading `Options`, `Futures` and `Coarse` data will use a
`FrontierAwareEnumerator` + `StepTimeProvider`. This will allow to hold
the selection data until its the desired time
- `Universe.CanRemoveMember` will round the members time in the universe
based on the `UniverseSettings.MinimumTimeInUniverse`
- C# `Timer` can sometimes be triggered before the expected due time.
Implementing `RealTimeScheduleEventService` that will guarantee a
scheduled event due time is respected and the event never happens before
time.
- Moving `MapFile` and `FactorFile` resolution to the data feed stack so
that they do not add a performance overhead to the algorithm thread.
- Create logging string messaged only if required.
- Calculate `FactorFileRow.PriceScaleFactor` the least amount of times
- `SecurityIdentifier` will calculate `StrikePrice` just once. Replacing
`!=` for a direct call to `Equals()` preventing unnecessary checks.
- Slightly improving Linq queries at `OptionFilterUniverse`
- Replace `OpenReader().CopyTo` for `Extract(stream)` avoids copying the
data twice.
- Replace `DateTime.Now` for `DateTime.UtcNow`
- Adding new regression test algorithm
- `SecurityPortfolioManager` will subscribe to the `CashBook.Updated`
event to invalidate the `TotalPortfolioValue
- Adding `LazyToUpper()` implementation, that will avoid the call to
`ToUpper` if the string is already upper.
- Reduce the timezone conversions at `Time.EachTradeableDayInTimeZone`
- `TotalPortfolioValue` will iterate over all securities once
- Adding new `SecurityIdentifier` cache, significant impact for
algorithms using coarse/fine data
- `TimeSliceFactory` will avoid creating empty collections
- `ExecutionModels` will check target collection count before trying to
enumerate
- Reduce calls to .`TotalPortfolioValue`
- `SecurityValues` will only be created when required
- `TimeKeeper` will use TimeZone unique Id as dictionary key. The
TimeZone hash is expensive.
- `AlgorithmManager` will avoid calling `DateTime.UtcNow`,
`ConvertFromUtc()` and `RoundDownInTimeZone()`
- For backtests download RemoteFile just once
- Live subscriptions and history requests will continue to download the
`RemoteFile` on each request.
- Adding unit tests
Jared Broad