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Eliza Weisman
9c31797a08
* net: switch from `log` to `tracing`. Motivation: The `tracing` crate implements scoped, structured, context-aware diagnostics, which can add significant debugging value over unstructured log messages. `tracing` is part of the Tokio project. As part of the `tokio` 0.2 changes, I thought it would be good to move over from `log` to `tracing` in the tokio runtime. Solution: This branch replaces the use of `log` in `tokio-net` with `tracing`. I've tried to leave all the instrumentation points more or less the same, but modified to use structured fields instead of string interpolation. Notes: I removed the timing in `Reactor::poll` in favor of simply adding a `#[tracing::instrument]` attribute. Since the generated `tracing` span will have enter and exit events, a `tracing::Subscriber` implemementation can use those to record timestamps, and process that timing data in a much more sophisticated manner than including it in a log line. We can add the timestamps back if they're desired. Signed-off-by: Eliza Weisman <[email protected]>
tokio-reactor
Event loop that drives Tokio I/O resources.
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