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Performance improvements for the trace SDK in Span. #5874

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merged 6 commits into from
Oct 9, 2024

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@boekkooi-impossiblecloud boekkooi-impossiblecloud commented Oct 7, 2024

Good day,
Thanks for review this PR!
This PR follows from #5864 and avoid multiple locks in End, RecordError, AddEvent and AddLink.

Benchstats result are:

goos: linux
goarch: amd64
pkg: go.opentelemetry.io/otel/sdk/trace
cpu: 11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz
           │ event-3cbd9671.txt │        event-pr-e9744b48.txt        │
           │       sec/op       │                 │
SpanEnd-12          63.07n ± 1%   53.63n ± 1%  -14.97% (p=0.000 n=10)

           │ event-3cbd9671.txt │     event-pr-e9744b48.txt      │
           │        B/op        │    B/op     vs base            │
SpanEnd-12           0.000 ± 0%   0.000 ± 0%  ~ (p=1.000 n=10) ¹
¹ all samples are equal

           │ event-3cbd9671.txt │     event-pr-e9744b48.txt      │
           │     allocs/op      │ allocs/op   vs base            │
SpanEnd-12           0.000 ± 0%   0.000 ± 0%  ~ (p=1.000 n=10) ¹
¹ all samples are equal

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codecov bot commented Oct 7, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.5%. Comparing base (8e9baf2) to head (324a71e).
Report is 1 commits behind head on main.

Additional details and impacted files

Impacted file tree graph

@@           Coverage Diff           @@
##            main   #5874     +/-   ##
=======================================
- Coverage   84.5%   84.5%   -0.1%     
=======================================
  Files        272     272             
  Lines      22804   22816     +12     
=======================================
+ Hits       19287   19288      +1     
- Misses      3171    3179      +8     
- Partials     346     349      +3     

see 2 files with indirect coverage changes

sdk/trace/span.go Outdated Show resolved Hide resolved
Co-authored-by: David Ashpole <dashpole@google.com>
@dmathieu dmathieu merged commit 6441653 into open-telemetry:main Oct 9, 2024
32 checks passed
@MrAlias MrAlias added this to the v1.31.0 milestone Oct 10, 2024
dashpole added a commit that referenced this pull request Oct 11, 2024
### Added

- Add `go.opentelemetry.io/otel/sdk/metric/exemplar` package which
includes `Exemplar`, `Filter`, `TraceBasedFilter`, `AlwaysOnFilter`,
`HistogramReservoir`, `FixedSizeReservoir`, `Reservoir`, `Value` and
`ValueType` types. These will be used for configuring the exemplar
reservoir for the metrics sdk. (#5747, #5862)
- Add `WithExportBufferSize` option to log batch processor.(#5877)

### Changed

- Enable exemplars by default in `go.opentelemetry.io/otel/sdk/metric`.
Exemplars can be disabled by setting
`OTEL_METRICS_EXEMPLAR_FILTER=always_off` (#5778)
- `Logger.Enabled` in `go.opentelemetry.io/otel/log` now accepts a newly
introduced `EnabledParameters` type instead of `Record`. (#5791)
- `FilterProcessor.Enabled` in
`go.opentelemetry.io/otel/sdk/log/internal/x` now accepts
`EnabledParameters` instead of `Record`. (#5791)
- The `Record` type in `go.opentelemetry.io/otel/log` is no longer
comparable. (#5847)
- Performance improvements for the trace SDK `SetAttributes` method in
`Span`. (#5864)
- Reduce memory allocations for the `Event` and `Link` lists in `Span`.
(#5858)
- Performance improvements for the trace SDK `AddEvent`, `AddLink`,
`RecordError` and `End` methods in `Span`. (#5874)

### Deprecated

- Deprecate all examples under `go.opentelemetry.io/otel/example` as
they are moved to [Contrib
repository](https://github.com/open-telemetry/opentelemetry-go-contrib/tree/main/examples).
(#5854)

### Fixed

- The race condition for multiple `FixedSize` exemplar reservoirs
identified in #5814 is resolved. (#5819)
- Fix log records duplication in case of heterogeneous resource
attributes by correctly mapping each log record to it's resource and
scope. (#5803)
- Fix timer channel drain to avoid hanging on Go 1.23. (#5868)
- Fix delegation for global meter providers, and panic when calling
otel.SetMeterProvider. (#5827)
- Change the `reflect.TypeOf` to use a nil pointer to not allocate on
the heap unless necessary. (#5827)
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4 participants