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BenchmarksBenchmark execution time: 2026-09-11 20:46:53 Comparing candidate commit 87a3869 in PR branch Found 0 performance improvements and 1 performance regressions! Performance is the same for 70 metrics, 1 unstable metrics, 66 known flaky benchmarks, 60 flaky benchmarks without significant changes.
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Execution-Time Benchmarks Report ⏱️Execution-time results for samples comparing This PR (9002) and master. ✅ No regressions detected |
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## Summary Aligns .NET OTLP trace metrics with the cross-tracer contract in DataDog/system-tests#7466. - Emits OTLP metric attributes independently of `DD_TRACE_OTEL_SEMANTICS_ENABLED` while retaining that setting for its other consumers. - Emits core SMC attributes first in the order `service.name`, `status.code`, `span.kind`, and `span.name`; unknown span kinds default to `SPAN_KIND_INTERNAL`. - Always emits `datadog.operation.name`, emits known trace-root and top-level values as booleans, and emits `datadog.svc_src` when present. Process and peer-tag arrays remain intentionally deferred to #9002. ## Validation - Focused `OtlpSpanStatsSerializerTests`: 59 passed - Production and test `dotnet format --verify-no-changes`: passed - `Datadog.Trace.csproj -f netstandard2.0 --no-restore`: passed with no warnings or errors - `git diff --check`: passed
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With this change, the following tests pass (link): Although this PR adds support for serializing peer tags in OTLP, the value is not set in the aggregator. The corresponding system test continues to fail. This is expected. |
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I think fundamentally the design here is not sound. We're doing huge allocations to try to decode utf8 byte arrays, but given we have access to those sources further up the pipeline, we should be looking at how we can expose these values instead
This reverts commit dda45fb.
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I think these are all @DataDog/apm-sdk-capabilities-dotnet files so they should have their ownership adjusted.
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This file should be owned by @DataDog/apm-sdk-capabilities-dotnet
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This file should be owned by @DataDog/apm-sdk-capabilities-dotnet
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This file should be owned by @DataDog/apm-sdk-capabilities-dotnet
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Summary
datadog.process_tagsas a resource string arraydatadog.peer_tagsas a data-point string arrayThis keeps optional tag serialization separate from the core OTLP trace metrics implementation in #8992.
Test plan
OtlpSpanStatsSerializerTestspass on .NET 10