tracing-core 0.1.20

This release adds support for f64 as one of the tracing-core
primitive field values, allowing floating-point values to be recorded as
typed values rather than with fmt::Debug. Additionally, it adds
NoSubscriber, a Subscriber implementation that does nothing.

Added

• subscriber: NoSubscriber, a no-op Subscriber implementation
  (#1549)
• field: Added Visit::record_f64 and support for recording
  floating-point values (#1507)

Thanks to new contributors @jsgf and @maxburke for contributing to this
release!

tracing-subscriber 0.2.14

0.2.14 (October 22, 2020)

Fixed

• registry: Fixed Registry::new allocating an excessively large amount of
  memory, most of which would never be used (#1064)

Changed

• registry: Improved new_span performance by reusing HashMap allocations
  for Extensions (#1064)
• registry: Significantly improved the performance of Registry::enter and
  Registry::exit (#1058)

tracing-core 0.1.17

Fixed

• Incorrect inlining of Event::dispatch and Event::child_of, which
  could result in dispatcher::get_default being inlined at the
  callsite (#994)

Added

• Copy implementations for Level and LevelFilter (#992)

Thanks to new contributors @jyn514 and @TaKO8Ki for contributing
to this release!

tracing-subscriber 0.2.9

Fixed

• fmt: Fixed compilation failure on MSRV when the chrono feature
  is disabled (#844)

Added

• fmt: Span lookup methods defined by layer::Context are now also
  provided by FmtContext (#834)

Tracing 0.1.17

Changed

• log: Moved verbose span enter/exit log records to
  "tracing::span::active" target, allowing them to be filtered
  separately (#833)
• log: All span lifecycle log records without fields now have the
  Trace log filter, to guard against log users enabling them by
  default with blanket level filtering (#833)

Fixed

• log/macros: Fixed missing implicit imports of the
  tracing::field::debug and tracing::field::display functions inside
  the macros when the "log" feature is enabled (#835)