Fix the trace payload size hint #664
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The incoming buffer may be much larger than the actual contained data. The decoder knows where the payload starts and ends, but the sidecar send_trace_v04 method does not. This ensures proper trace coalescing, leading to less individual http requests. Signed-off-by: Bob Weinand <bob.weinand@datadoghq.com>
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BenchmarksComparisonBenchmark execution time: 2024-10-03 17:32:10 Comparing candidate commit ce20078 in PR branch Found 0 performance improvements and 0 performance regressions! Performance is the same for 51 metrics, 2 unstable metrics. CandidateCandidate benchmark detailsGroup 1
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BaselineOmitted due to size. |
ekump
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Oct 3, 2024
| @@ -47,49 +47,56 @@ use tinybytes::{Bytes, BytesString}; | |||
| /// }; | |||
| /// let encoded_data = to_vec_named(&vec![vec![span]]).unwrap(); | |||
| /// let encoded_data_as_tinybytes = tinybytes::Bytes::from(encoded_data); | |||
| /// let decoded_traces = from_slice(encoded_data_as_tinybytes).expect("Decoding failed"); | |||
| /// let (decoded_traces, _) = from_slice(encoded_data_as_tinybytes).expect("Decoding failed"); | |||
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| /// let (decoded_traces, _) = from_slice(encoded_data_as_tinybytes).expect("Decoding failed"); | |
| /// let (decoded_traces, _payload_size) = from_slice(encoded_data_as_tinybytes).expect("Decoding failed"); |
I think it's helpful to at least name the variable, even if we don't use it in the example.
| @@ -270,7 +277,7 @@ mod tests { | |||
| ..Default::default() | |||
| }; | |||
| let encoded_data = rmp_serde::to_vec_named(&vec![vec![span]]).unwrap(); | |||
| let decoded_traces = | |||
| let (decoded_traces, _) = | |||
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We should probably have at least one unit test that checks we're returning the correct size.
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #664 +/- ##
==========================================
+ Coverage 71.78% 71.79% +0.01%
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Files 271 271
Lines 40895 40912 +17
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+ Hits 29357 29374 +17
Misses 11538 11538
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The incoming buffer may be much larger than the actual contained data. The decoder knows where the payload starts and ends, but the sidecar send_trace_v04 method does not.
This ensures proper trace coalescing, leading to less individual http requests.