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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.
This screenshot from the hotspot readme shows a Location panel which also displays line numbers. Is it not working for you?
I'd suggest cargo flamegraph https://github.com/killercup/cargo-flamegraph
Check out Optick For Rust
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Hence, a higher number means a more popular project.