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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.
On macOS, per-window capture is actually exceedingly easy and officially supported by Apple, either including window shadows or not. I'm not aware of any crate for doing it cross-platform, but the way to do it on macOS is documented all over the Internet and the bindings you need are in the objc and core-graphics crates.
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