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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.
While researching this I came across https://github.com/wimglenn/advent-of-code-data . If you are looking for something a little more fleshed out than a command line. It lets you access previous years' data as well. Pretty cool.
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