perf(trace): encode agentless IDs without formatting by BridgeAR · Pull Request #2452 · DataDog/libdatadog

BridgeAR · 2026-09-03T11:21:55Z

What does this PR do?

Replaces formatting-backed agentless trace, span, parent, and link ID serialization with fixed-width lowercase hexadecimal buffers. Exact wire tests and lasting Criterion workloads cover common HTTP and span-link traces.

Motivation

Formatting allocated temporary strings for every serialized ID in the agentless hot path.

Additional Notes

With production-deduplicated spans, position-balanced Criterion runs improved common HTTP traces by 32.35% and span-link traces by 44.48% on macOS arm64.

How to test the change?

Run cargo test -p libdd-trace-utils --lib agentless_encoder and cargo bench -p libdd-trace-utils --bench main -- agentless_encoding.

datadog-prod-us1-5 · 2026-09-03T11:31:44Z

✅ All CI checks and tests passed.

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 77.81% (+0.01%)

_{This comment will be updated automatically if new data arrives.

🔗 Commit SHA: 7525711 | Docs | View more details | Give us feedback!}

pr-commenter · 2026-09-03T11:55:02Z

Benchmarks

Comparison

Benchmark execution time: 2026-09-10 12:48:15

Comparing candidate commit 7525711 in PR branch BridgeAR/2026-09-03-agentless-hex-ids with baseline commit 96d64dd in branch main.

📊 Benchmarking dashboard

Found 3 performance improvements and 1 performance regressions! Performance is the same for 120 metrics, 0 unstable metrics.

Explanation

This is an A/B test comparing a candidate commit's performance against that of a baseline commit. Performance changes are noted in the tables below as:

🟩 = significantly better candidate vs. baseline
🟥 = significantly worse candidate vs. baseline

We compute a confidence interval (CI) over the relative difference of means between metrics from the candidate and baseline commits, considering the baseline as the reference.

If the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD), the change is considered significant.

Feel free to reach out to #apm-benchmarking-platform on Slack if you have any questions.

More details about the CI and significant changes

You can imagine this CI as a range of values that is likely to contain the true difference of means between the candidate and baseline commits.

CIs of the difference of means are often centered around 0%, because often changes are not that big:

---------------------------------(------|---^--------)-------------------------------->
                              -0.6%    0%  0.3%     +1.2%
                                 |          |        |
         lower bound of the CI --'          |        |
sample mean (center of the CI) -------------'        |
         upper bound of the CI ----------------------'

As described above, a change is considered significant if the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD).

For instance, for an execution time metric, this confidence interval indicates a significantly worse performance:

----------------------------------------|---------|---(---------^---------)---------->
                                       0%        1%  1.3%      2.2%      3.1%
                                                  |   |         |         |
       significant impact threshold --------------'   |         |         |
                      lower bound of CI --------------'         |         |
       sample mean (center of the CI) --------------------------'         |
                      upper bound of CI ----------------------------------'

scenario:msgpack_decoder::v05/low_sharing/2000

🟩 throughput [+22059.066op/s; +22369.228op/s] or [+4.017%; +4.073%]

scenario:otlp/e2e_json/1x1000

🟩 execution_time [-369.566µs; -367.919µs] or [-8.431%; -8.393%]

scenario:otlp/encode_json/1x1000

🟩 execution_time [-380.444µs; -379.985µs] or [-18.677%; -18.655%]

scenario:otlp/encode_protobuf/1x1000

🟥 execution_time [+58.985µs; +59.564µs] or [+5.698%; +5.754%]

Candidate

Omitted due to size.

Baseline

Omitted due to size.

dd-octo-sts · 2026-09-03T11:59:04Z

Artifact Size Benchmark Report

aarch64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.so	9.02 MB	9.02 MB	0% (0 B) 👌
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.a	95.92 MB	95.91 MB	--.01% (-14.95 KB) 💪

aarch64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.a	107.28 MB	107.26 MB	--.01% (-15.82 KB) 💪
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.so	12.18 MB	12.18 MB	+0% (+112 B) 👌

libdatadog-x64-windows

Artifact	Baseline	Commit	Change
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.dll	29.01 MB	29.01 MB	--.01% (-5.00 KB) 💪
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.lib	96.08 KB	96.08 KB	0% (0 B) 👌
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.pdb	191.83 MB	191.84 MB	+0% (+8.00 KB) 👌
/libdatadog-x64-windows/debug/static/datadog_profiling_ffi.lib	819.24 MB	819.65 MB	+.05% (+420.95 KB) 🔍
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.dll	9.69 MB	9.69 MB	--.05% (-5.50 KB) 💪
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.lib	96.08 KB	96.08 KB	0% (0 B) 👌
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.pdb	27.49 MB	27.48 MB	--.02% (-8.00 KB) 💪
/libdatadog-x64-windows/release/static/datadog_profiling_ffi.lib	55.55 MB	55.54 MB	--.01% (-8.62 KB) 💪

libdatadog-x86-windows

Artifact	Baseline	Commit	Change
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.dll	25.37 MB	25.37 MB	--.01% (-4.50 KB) 💪
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.lib	97.58 KB	97.58 KB	0% (0 B) 👌
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.pdb	197.10 MB	197.10 MB	0% (0 B) 👌
/libdatadog-x86-windows/debug/static/datadog_profiling_ffi.lib	803.99 MB	804.59 MB	+.07% (+615.98 KB) 🔍
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.dll	7.51 MB	7.51 MB	--.03% (-3.00 KB) 💪
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.lib	97.58 KB	97.58 KB	0% (0 B) 👌
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.pdb	29.64 MB	29.62 MB	--.05% (-16.00 KB) 💪
/libdatadog-x86-windows/release/static/datadog_profiling_ffi.lib	52.55 MB	52.53 MB	--.03% (-16.93 KB) 💪

x86_64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.a	85.90 MB	85.88 MB	--.01% (-13.09 KB) 💪
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.so	10.03 MB	10.02 MB	--.03% (-4.00 KB) 💪

x86_64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.a	101.83 MB	101.82 MB	--.01% (-13.68 KB) 💪
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.so	12.25 MB	12.25 MB	+0% (+88 B) 👌

yannham · 2026-09-10T09:22:06Z

Is this PR superseded by #2454? Or still worth reviewing?

BridgeAR · 2026-09-10T09:30:29Z

@yannham it is additional to the other PR, it just needs a rebase after it lands

BridgeAR · 2026-09-10T10:49:19Z

/merge

gh-worker-devflow-routing-ef8351 · 2026-09-10T10:49:24Z

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2026-09-10 10:49:23 UTC ℹ️ Start processing command /merge

2026-09-10 10:49:30 UTC ℹ️ MergeQueue: Pull request is not mergeable yet

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2026-09-10 12:53:22 UTC ℹ️ MergeQueue: merge request added to the queue

The expected merge time in main is approximately 49m (p90).

2026-09-10 13:36:31 UTC ℹ️ MergeQueue: This merge request was merged

Replace formatting allocations with fixed-width stack buffers for agentless trace, span, parent, and link IDs. With production-deduplicated spans, position-balanced Criterion runs on macOS arm64 improved common HTTP traces by 32.35% and span-link traces by 44.48%. # Conflicts: # libdd-trace-utils/benches/main.rs

Keep the agentless and JSON log encoders on one stack-backed implementation so their fixed-width hexadecimal wire formats cannot drift.

Release LLVM IR contains no calls to the annotated helper chain, so the hints do not affect the hot path.

…ibdd-data-pipeline, libdd-li... (#2571)  # Release proposal for libdd-capabilities-impl, libdd-common, libdd-data-pipeline, libdd-library-config, libdd-profiling-heap-allocator, libdd-remote-config, libdd-sampling, libdd-shared-runtime, libdd-telemetry, libdd-tinybytes, libdd-trace-utils and their dependencies This PR contains version bumps based on public API changes and commits since last release. ### ⚠️ Crates left out of this proposal affected by its major bumps These publishable workspace crates are not part of this release but their dependency requirement was rewritten on this branch while their published version still requires the old major. If they are a dependency on your deployment not including them in the release could result in duplicate packages or symbol incompatibility. - `libdd-capabilities` `3.0.1` → `4.0.0` affects: `libdd-crashtracker`, `libdd-ffe`, `libdd-live-debugger` - `libdd-capabilities-impl` `5.0.0` → `6.0.0` affects: `libdd-crashtracker`, `libdd-live-debugger`, `libdd-tracer-flare` - `libdd-common` `6.0.0` → `7.0.0` affects: `libdd-crashtracker`, `libdd-ffe`, `libdd-http-client`, `libdd-ipc`, `libdd-live-debugger`, `libdd-profiling`, `libdd-tracer-flare` - `libdd-data-pipeline` `10.0.0` → `11.0.0` affects: `libdd-live-debugger` - `libdd-remote-config` `5.0.0` → `6.0.0` affects: `libdd-ffe`, `libdd-live-debugger`, `libdd-tracer-flare` - `libdd-telemetry` `8.0.0` → `9.0.0` affects: `libdd-crashtracker` - `libdd-trace-stats` `9.0.0` → `10.0.0` affects: `libdd-ipc` - `libdd-trace-utils` `12.0.0` → `13.0.0` affects: `libdd-tracer-flare` ## libdd-capabilities **Next version:** `4.0.0` **Semver bump:** `major` **Tag:** `libdd-capabilities-v4.0.0` ### Commits - feat(trace-exporter)!: add API to force flush stats on the trace exporter (#2538) - refactor!: apply small timeout pooling strategy to libdd-http-client as well (#2449) - chore: move all remaining external deps to workspace-level dependencies (#2476) ## libdd-common **Next version:** `7.0.0` **Semver bump:** `major` **Tag:** `libdd-common-v7.0.0` ### Commits - build: enforce workspace-level dependency declarations (#2514) - chore!: remove unused dependencies (v2) (#2511) - chore: move all remaining external deps to workspace-level dependencies (#2476) - chore(libdd-data-pipeline): solve cargo deny [APMSP-3884] (#2318) - fix!: benchmark was doing many samples for deterministic heap usage (#2465) ## libdd-ddsketch **Next version:** `1.1.2` **Semver bump:** `patch` **Tag:** `libdd-ddsketch-v1.1.2` ### Commits - chore: move all remaining external deps to workspace-level dependencies (#2476) - chore(libdd-data-pipeline): solve cargo deny [APMSP-3884] (#2318) ## libdd-profiling-heap-sampler **Next version:** `1.1.0` **Semver bump:** `minor` **Tag:** `libdd-profiling-heap-sampler-v1.1.0` ### Commits - chore: move all remaining external deps to workspace-level dependencies (#2476) - refactor: migrate to workspace dependencies, phase 4 (#2296) - feat(profiling): add USDT semaphores to skip slow path around heap profile sampler (#2266) ## libdd-tinybytes **Next version:** `1.1.4` **Semver bump:** `patch` **Tag:** `libdd-tinybytes-v1.1.4` ### Commits - chore: move all remaining external deps to workspace-level dependencies (#2476) ## libdd-trace-protobuf **Next version:** `5.0.1` **Semver bump:** `patch` **Tag:** `libdd-trace-protobuf-v5.0.1` ### Commits - chore: move all remaining external deps to workspace-level dependencies (#2476) - fix(build): build script change detection (#2467) ## libdd-capabilities-impl **Next version:** `6.0.0` **Semver bump:** `major` **Tag:** `libdd-capabilities-impl-v6.0.0` ### ⚠️ major bump forced due to: - `libdd-capabilities`: ^3.0.1 → ^4.0.0 - `libdd-common`: ^6.0.0 → ^7.0.0 ### Commits - refactor!: apply small timeout pooling strategy to libdd-http-client as well (#2449) - fix(sidecar)!: stabilize the sidecar for macos usage (#2475) - chore: move all remaining external deps to workspace-level dependencies (#2476) ## libdd-profiling-heap-allocator **Next version:** `1.1.0` **Semver bump:** `minor` **Tag:** `libdd-profiling-heap-allocator-v1.1.0` ### Commits - refactor(benchmarks): measure allocator thread CPU time (#2500) - refactor: migrate to workspace dependencies, phase 4 (#2296) - feat(profiling): add USDT semaphores to skip slow path around heap profile sampler (#2266) ## libdd-library-config **Next version:** `4.1.0` **Semver bump:** `minor` **Tag:** `libdd-library-config-v4.1.0` ### Commits - chore!: remove unused dependencies (v2) (#2511) - chore: move all remaining external deps to workspace-level dependencies (#2476) ## libdd-trace-normalization **Next version:** `4.1.0` **Semver bump:** `minor` **Tag:** `libdd-trace-normalization-v4.1.0` ### Commits - chore: move all remaining external deps to workspace-level dependencies (#2476) - chore(libdd-data-pipeline): solve cargo deny [APMSP-3884] (#2318) ## libdd-remote-config **Next version:** `6.0.0` **Semver bump:** `major` **Tag:** `libdd-remote-config-v6.0.0` ### ⚠️ major bump forced due to: - `libdd-capabilities`: ^3.0.1 → ^4.0.0 - `libdd-capabilities-impl`: ^5.0.0 → ^6.0.0 - `libdd-common`: ^6.0.0 → ^7.0.0 ### Commits - refactor!: apply small timeout pooling strategy to libdd-http-client as well (#2449) - chore!: remove unused dependencies (v2) (#2511) - fix(rem-cfg)!: remove AsmRawResponseBody (#2540) - chore: move all remaining external deps to workspace-level dependencies (#2476) ## libdd-shared-runtime **Next version:** `5.0.0` **Semver bump:** `major` **Tag:** `libdd-shared-runtime-v5.0.0` ### ⚠️ major bump forced due to: - `libdd-capabilities`: ^3.0.1 → ^4.0.0 - `libdd-capabilities-impl`: ^5.0.0 → ^6.0.0 - `libdd-common`: ^6.0.0 → ^7.0.0 ### Commits - feat(trace-exporter)!: add API to force flush stats on the trace exporter (#2538) - chore: move all remaining external deps to workspace-level dependencies (#2476) ## libdd-trace-utils **Next version:** `13.0.0` **Semver bump:** `major` **Tag:** `libdd-trace-utils-v13.0.0` ### ⚠️ major bump forced due to: - `libdd-capabilities`: ^3.0.1 → ^4.0.0 - `libdd-capabilities-impl`: ^5.0.0 → ^6.0.0 - `libdd-common`: ^6.0.0 → ^7.0.0 ### Commits - fix(trace-utils)!: add forgotten css to agentless v1 encoder (#2557) - fix(otlp): use potential dedupe in otlp serialization path (#2531) - feat(trace-utils)!: add v1-native OTLP encoder brick (#2369) - perf(serialization): bench the actual path used by the trace exporter (#2512) - perf(trace): write agentless JSON directly (#2454) - chore: move all remaining external deps to workspace-level dependencies (#2476) - perf(trace): encode agentless IDs without formatting (#2452) - perf(trace-utils)!: use pooled spans on the send path (#2382) - feat(data-pipeline)!: OTLP gRPC trace export (#2171) - chore(libdd-data-pipeline): solve cargo deny [APMSP-3884] (#2318) - fix!: benchmark was doing many samples for deterministic heap usage (#2465) ## libdd-dogstatsd-client **Next version:** `7.0.0` **Semver bump:** `major` **Tag:** `libdd-dogstatsd-client-v7.0.0` ### ⚠️ major bump forced due to: - `libdd-common`: ^6.0.0 → ^7.0.0 - `libdd-shared-runtime`: ^4.0.0 → ^5.0.0 ### Commits - chore: move all remaining external deps to workspace-level dependencies (#2476) ## libdd-telemetry **Next version:** `9.0.0` **Semver bump:** `major` **Tag:** `libdd-telemetry-v9.0.0` ### ⚠️ major bump forced due to: - `libdd-capabilities`: ^3.0.1 → ^4.0.0 - `libdd-common`: ^6.0.0 → ^7.0.0 - `libdd-shared-runtime`: ^4.0.0 → ^5.0.0 ### Commits - refactor!: apply small timeout pooling strategy to libdd-http-client as well (#2449) - chore!: remove unused dependencies (v2) (#2511) - chore: move all remaining external deps to workspace-level dependencies (#2476) - fix(telemetry): fall back to the proper intake telemetry domain when direct submission is enabled (#2484) ## libdd-sampling **Next version:** `7.0.0` **Semver bump:** `major` **Tag:** `libdd-sampling-v7.0.0` ### ⚠️ major bump forced due to: - `libdd-common`: ^5.2.0 → ^7.0.0 - `libdd-trace-utils`: ^10.1.0 → ^13.0.0 ### Commits - chore(benchmarks): remove batched-loop sampling noise (#2498) - chore: move all remaining external deps to workspace-level dependencies (#2476) - fix!: benchmark was doing many samples for deterministic heap usage (#2465) - feat(trace-utils)!: add from owned to SpanText (#2403) - test(sampling): make rate_limiter thread-safety test deterministic (#2354) ## libdd-trace-obfuscation **Next version:** `9.0.0` **Semver bump:** `major` **Tag:** `libdd-trace-obfuscation-v9.0.0` ### ⚠️ major bump forced due to: - `libdd-common`: ^6.0.0 → ^7.0.0 - `libdd-trace-utils`: ^12.0.0 → ^13.0.0 ### Commits - feat(data-pipeline)!: refactor agent's /info obfuscation config format (#2490) - fix(obfuscation): keep URLs whose path or fragment holds a bracket (#2527) - fix(obfuscation): stop forcing serde_json/preserve_order on dependents (#2529) - fix(obfuscation): prevent crash and cap recursion in SQL/HTTP obfuscation (#2441) - chore: move all remaining external deps to workspace-level dependencies (#2476) - fix(data-pipeline-ffi): harden agentless config setters and parse obfuscation config once (#2474) ## libdd-trace-stats **Next version:** `10.0.0` **Semver bump:** `major` **Tag:** `libdd-trace-stats-v10.0.0` ### ⚠️ major bump forced due to: - `libdd-capabilities`: ^3.0.1 → ^4.0.0 - `libdd-capabilities-impl`: ^5.0.0 → ^6.0.0 - `libdd-common`: ^6.0.0 → ^7.0.0 - `libdd-shared-runtime`: ^4.0.0 → ^5.0.0 - `libdd-trace-obfuscation`: ^8.0.0 → ^9.0.0 - `libdd-trace-utils`: ^12.0.0 → ^13.0.0 ### Commits - feat(trace-exporter)!: add API to force flush stats on the trace exporter (#2538) - fix(trace-stats): cardinality limit telemetry name (#2559) - feat(data-pipeline)!: refactor agent's /info obfuscation config format (#2490) - chore!: remove unused dependencies (v2) (#2511) - feat(data-pipeline)!: generate agentless trace stats (#2488) - chore: move all remaining external deps to workspace-level dependencies (#2476) - chore(libdd-data-pipeline): solve cargo deny [APMSP-3884] (#2318) ## libdd-data-pipeline-core **Next version:** `2.0.0` **Semver bump:** `major` **Tag:** `libdd-data-pipeline-core-v2.0.0` ### ⚠️ major bump forced due to: - `libdd-capabilities`: ^3.0.1 → ^4.0.0 - `libdd-common`: ^6.0.0 → ^7.0.0 - `libdd-trace-obfuscation`: ^8.0.0 → ^9.0.0 - `libdd-trace-utils`: ^12.0.0 → ^13.0.0 ### Commits - refactor!: apply small timeout pooling strategy to libdd-http-client as well (#2449) - feat(data-pipeline)!: generate agentless trace stats (#2488) - perf(data-pipeline): avoid parsing static entity header names (#2457) - chore: move all remaining external deps to workspace-level dependencies (#2476) - perf(trace-utils)!: use pooled spans on the send path (#2382) ## libdd-data-pipeline **Next version:** `11.0.0` **Semver bump:** `major` **Tag:** `libdd-data-pipeline-v11.0.0` ### ⚠️ major bump forced due to: - `libdd-capabilities`: ^3.0.1 → ^4.0.0 - `libdd-capabilities-impl`: ^5.0.0 → ^6.0.0 - `libdd-common`: ^6.0.0 → ^7.0.0 - `libdd-data-pipeline-core`: ^1.0.0 → ^2.0.0 - `libdd-shared-runtime`: ^4.0.0 → ^5.0.0 - `libdd-trace-obfuscation`: ^8.0.0 → ^9.0.0 - `libdd-trace-stats`: ^9.0.0 → ^10.0.0 - `libdd-trace-utils`: ^12.0.0 → ^13.0.0 ### Commits - feat(trace-exporter)!: add API to force flush stats on the trace exporter (#2538) - refactor!: apply small timeout pooling strategy to libdd-http-client as well (#2449) - feat(data-pipeline)!: refactor agent's /info obfuscation config format (#2490) - test(data-pipeline): stop OTLP gRPC post-connect test from hanging (#2549) - chore!: remove unused dependencies (v2) (#2511) - feat(data-pipeline)!: generate agentless trace stats (#2488) - fix(otlp): use potential dedupe in otlp serialization path (#2531) - refactor(benchmarks): isolate enqueue timing in data-pipeline (#2499) - perf(trace): write agentless JSON directly (#2454) - test(data-pipeline): fix flaky OTLP gRPC exporter integration tests (#2505) - chore: move all remaining external deps to workspace-level dependencies (#2476) - perf(trace-utils)!: use pooled spans on the send path (#2382) - feat(data-pipeline)!: OTLP gRPC trace export (#2171) - chore(libdd-data-pipeline): solve cargo deny [APMSP-3884] (#2318) [APMSP-3884]: https://datadoghq.atlassian.net/browse/APMSP-3884?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ --------- Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: paullegranddc <82819397+paullegranddc@users.noreply.github.com>

github-actions Bot added the mini-agent label Sep 3, 2026

BridgeAR marked this pull request as ready for review September 9, 2026 21:55

BridgeAR requested review from a team as code owners September 9, 2026 21:55

BridgeAR force-pushed the BridgeAR/2026-09-03-agentless-hex-ids branch from 03bcf5c to 5853139 Compare September 9, 2026 22:07

yannham approved these changes Sep 10, 2026

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Comment thread libdd-trace-utils/src/hex.rs Outdated

gh-worker-dd-devflow-36fce6 Bot added the mergequeue-status: waiting label Sep 10, 2026

gh-worker-devflow-routing-ef8351 Bot mentioned this pull request Sep 10, 2026

perf(trace): write agentless JSON directly #2454

Merged

BridgeAR added 3 commits September 10, 2026 14:18

refactor(trace): share fixed-width ID encoding

324da57

Keep the agentless and JSON log encoders on one stack-backed implementation so their fixed-width hexadecimal wire formats cannot drift.

refactor(trace-utils): remove redundant inline hints

7525711

Release LLVM IR contains no calls to the annotated helper chain, so the hints do not affect the hot path.

BridgeAR force-pushed the BridgeAR/2026-09-03-agentless-hex-ids branch from 22bda7d to 7525711 Compare September 10, 2026 12:19

gh-worker-dd-devflow-36fce6 Bot added mergequeue-status: queued mergequeue-status: in_progress and removed mergequeue-status: waiting mergequeue-status: queued labels Sep 10, 2026

gh-worker-dd-mergequeue-cf854d Bot merged commit 513a0ae into main Sep 10, 2026
110 checks passed

gh-worker-dd-devflow-36fce6 Bot added mergequeue-status: done and removed mergequeue-status: in_progress labels Sep 10, 2026

gh-worker-dd-mergequeue-cf854d Bot deleted the BridgeAR/2026-09-03-agentless-hex-ids branch September 10, 2026 13:36

dd-octo-sts Bot mentioned this pull request Sep 24, 2026

chore(release): proposal for libdd-capabilities-impl, libdd-common, libdd-data-pipeline, libdd-li... #2571

Merged

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perf(trace): encode agentless IDs without formatting - #2452

perf(trace): encode agentless IDs without formatting#2452
gh-worker-dd-mergequeue-cf854d[bot] merged 3 commits into
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BridgeAR commented Sep 3, 2026

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datadog-prod-us1-5 Bot commented Sep 3, 2026 •

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dd-octo-sts Bot commented Sep 3, 2026 •

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BridgeAR commented Sep 10, 2026

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BridgeAR commented Sep 10, 2026

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BridgeAR commented Sep 3, 2026

What does this PR do?

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How to test the change?

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Benchmarks

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scenario:msgpack_decoder::v05/low_sharing/2000

scenario:otlp/e2e_json/1x1000

scenario:otlp/encode_json/1x1000

scenario:otlp/encode_protobuf/1x1000

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Artifact Size Benchmark Report

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yannham commented Sep 10, 2026

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BridgeAR commented Sep 10, 2026

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dd-octo-sts Bot commented Sep 3, 2026 •

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gh-worker-devflow-routing-ef8351 Bot commented Sep 10, 2026 •

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