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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.
That was historically true (though not entirely, as the yield points were implicit and included every function call, so the average program would not behave like "standard" cooperatively scheduled systems à la Classic MacOS), however in 1.14 Go introduced a preempter.
I think at 50k you’ll run into various “number” limits as describe here: https://github.com/jimblandy/context-switch#running-tests-with-large-numbers-of-threads
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.