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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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paperbroker
An open source simulated options brokerage and UI for paper trading, algorithmic interfaces and backtesting.
If you apply something like https://github.com/rkern/line_profiler to your code it will give you a line-by-line breakdown of where the time is being spent in the code.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.