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Robert Pająk 55ff06fbdd sdk/log: Change BenchmarkLoggerNewRecord to BenchmarkLoggerEmit (#6315 )

I find having benchmark for `Emit` more useful than just for
`newRecord`.
It can be used to showcase the performance benefit of using `Enabled`
even for a record with 10 attributes.

```
goos: linux
goarch: amd64
pkg: go.opentelemetry.io/otel/sdk/log
cpu: 13th Gen Intel(R) Core(TM) i7-13800H
BenchmarkLoggerEmit/5_attributes-20               511827              2609 ns/op           41947 B/op          1 allocs/op
BenchmarkLoggerEmit/10_attributes-20             1000000              3520 ns/op           46905 B/op          5 allocs/op
BenchmarkLoggerEnabled-20                       263691399                4.549 ns/op           0 B/op          0 allocs/op
```

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Co-authored-by: Damien Mathieu <42@dmathieu.com>

2025-02-14 09:40:02 +01:00