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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.
The only faster alternative that doesn't lose much flexibility would be to roll your own custom version of std::function that has a medium sized std::aligned_storage_t (or just an std::max_align_t aligned array of std::byte or unsigned char) buffer instead of using a dynamic allocation to hold its functor data. (Or use an implementation of the proposed inplace_function such as https://github.com/WG21-SG14/SG14/blob/master/SG14/inplace_function.h )
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