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Efficient Trace Payload Protocol (v1 protocol)#10801

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gh-worker-dd-mergequeue-cf854d[bot] merged 89 commits intomasterfrom
alexeyk/protocol-v1-1
Apr 23, 2026
Merged

Efficient Trace Payload Protocol (v1 protocol)#10801
gh-worker-dd-mergequeue-cf854d[bot] merged 89 commits intomasterfrom
alexeyk/protocol-v1-1

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@AlexeyKuznetsov-DD AlexeyKuznetsov-DD commented Mar 10, 2026 •
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What Does This Do

  • Implements support for the Datadog Agent Efficient Trace Payload Protocol v1.0 (v1.0/traces endpoint) in the Java tracer.
  • Introduces TraceMapperV1, a new serializer that encodes traces in the v1 msgpack format with a flat attribute model, string table deduplication, and typed attribute values.
  • Adds a ProtocolVersion enum to cleanly represent v0.4, v0.5, and v1.0 protocols including their fallback endpoint chains.
  • Updates DDAgentFeaturesDiscovery to probe endpoints based on the configured protocol version.

Motivation

Protocol v1 is a more efficient wire format: it deduplicates repeated strings via a string table, uses typed attribute values (string/bool/float/int/bytes/array). This reduces payload size and provides a cleaner foundation for future span model evolution. The implementation falls back gracefully to v0.4 when the agent does not advertise v1 support.

Additional Notes

Protocol v1 spec
System test passed both on GitHub and GitLab.

@AlexeyKuznetsov-DD AlexeyKuznetsov-DD self-assigned this Mar 10, 2026
@AlexeyKuznetsov-DD AlexeyKuznetsov-DD added tag: do not merge Do not merge changes comp: core Tracer core labels Mar 10, 2026
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pr-commenter Bot commented Mar 11, 2026 •
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Benchmarks

Startup

Parameters

Baseline Candidate
baseline_or_candidate baseline candidate
git_branch master alexeyk/protocol-v1-1
git_commit_date 1776899365 1776953664
git_commit_sha 8569434 c1d9b0a
release_version 1.62.0-SNAPSHOT~8569434beb 1.61.0-SNAPSHOT~c1d9b0a4df
See matching parameters
Baseline Candidate
application insecure-bank insecure-bank
ci_job_date 1776955418 1776955418
ci_job_id 1624266359 1624266359
ci_pipeline_id 109311800 109311800
cpu_model Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version Linux runner-zfyrx7zua-project-304-concurrent-0-6n1e6vg6 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux Linux runner-zfyrx7zua-project-304-concurrent-0-6n1e6vg6 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
module Agent Agent
parent None None

Summary

Found 0 performance improvements and 0 performance regressions! Performance is the same for 59 metrics, 12 unstable metrics.

Startup time reports for petclinic 
gantt
    title petclinic - global startup overhead: candidate=1.61.0-SNAPSHOT~c1d9b0a4df, baseline=1.62.0-SNAPSHOT~8569434beb

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.065 s) : 0, 1065131
Total [baseline] (11.085 s) : 0, 11085139
Agent [candidate] (1.06 s) : 0, 1060003
Total [candidate] (11.036 s) : 0, 11035566
section appsec
Agent [baseline] (1.27 s) : 0, 1269552
Total [baseline] (11.009 s) : 0, 11008648
Agent [candidate] (1.26 s) : 0, 1259920
Total [candidate] (11.029 s) : 0, 11028532
section iast
Agent [baseline] (1.231 s) : 0, 1230698
Total [baseline] (11.372 s) : 0, 11371663
Agent [candidate] (1.239 s) : 0, 1239369
Total [candidate] (11.337 s) : 0, 11337107
section profiling
Agent [baseline] (1.191 s) : 0, 1190752
Total [baseline] (11.087 s) : 0, 11087424
Agent [candidate] (1.183 s) : 0, 1183136
Total [candidate] (11.086 s) : 0, 11086317
Loading
  • baseline results
Module Variant Duration Δ tracing
Agent tracing 1.065 s -
Agent appsec 1.27 s 204.421 ms (19.2%)
Agent iast 1.231 s 165.567 ms (15.5%)
Agent profiling 1.191 s 125.621 ms (11.8%)
Total tracing 11.085 s -
Total appsec 11.009 s -76.491 ms (-0.7%)
Total iast 11.372 s 286.524 ms (2.6%)
Total profiling 11.087 s 2.285 ms (0.0%)
  • candidate results
Module Variant Duration Δ tracing
Agent tracing 1.06 s -
Agent appsec 1.26 s 199.917 ms (18.9%)
Agent iast 1.239 s 179.367 ms (16.9%)
Agent profiling 1.183 s 123.133 ms (11.6%)
Total tracing 11.036 s -
Total appsec 11.029 s -7.034 ms (-0.1%)
Total iast 11.337 s 301.542 ms (2.7%)
Total profiling 11.086 s 50.752 ms (0.5%) 
gantt
    title petclinic - break down per module: candidate=1.61.0-SNAPSHOT~c1d9b0a4df, baseline=1.62.0-SNAPSHOT~8569434beb

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.238 ms) : 0, 1238
crashtracking [candidate] (1.216 ms) : 0, 1216
BytebuddyAgent [baseline] (637.209 ms) : 0, 637209
BytebuddyAgent [candidate] (634.387 ms) : 0, 634387
AgentMeter [baseline] (29.8 ms) : 0, 29800
AgentMeter [candidate] (29.488 ms) : 0, 29488
GlobalTracer [baseline] (251.431 ms) : 0, 251431
GlobalTracer [candidate] (248.841 ms) : 0, 248841
AppSec [baseline] (32.586 ms) : 0, 32586
AppSec [candidate] (32.302 ms) : 0, 32302
Debugger [baseline] (60.436 ms) : 0, 60436
Debugger [candidate] (60.605 ms) : 0, 60605
Remote Config [baseline] (611.95 µs) : 0, 612
Remote Config [candidate] (595.256 µs) : 0, 595
Telemetry [baseline] (8.091 ms) : 0, 8091
Telemetry [candidate] (8.847 ms) : 0, 8847
Flare Poller [baseline] (7.406 ms) : 0, 7406
Flare Poller [candidate] (7.515 ms) : 0, 7515
section appsec
crashtracking [baseline] (1.232 ms) : 0, 1232
crashtracking [candidate] (1.231 ms) : 0, 1231
BytebuddyAgent [baseline] (679.443 ms) : 0, 679443
BytebuddyAgent [candidate] (673.361 ms) : 0, 673361
AgentMeter [baseline] (12.207 ms) : 0, 12207
AgentMeter [candidate] (12.163 ms) : 0, 12163
GlobalTracer [baseline] (250.595 ms) : 0, 250595
GlobalTracer [candidate] (248.988 ms) : 0, 248988
IAST [baseline] (24.468 ms) : 0, 24468
IAST [candidate] (24.158 ms) : 0, 24158
AppSec [baseline] (186.051 ms) : 0, 186051
AppSec [candidate] (186.972 ms) : 0, 186972
Debugger [baseline] (66.927 ms) : 0, 66927
Debugger [candidate] (64.841 ms) : 0, 64841
Remote Config [baseline] (578.11 µs) : 0, 578
Remote Config [candidate] (568.578 µs) : 0, 569
Telemetry [baseline] (7.973 ms) : 0, 7973
Telemetry [candidate] (7.79 ms) : 0, 7790
Flare Poller [baseline] (3.467 ms) : 0, 3467
Flare Poller [candidate] (3.445 ms) : 0, 3445
section iast
crashtracking [baseline] (1.221 ms) : 0, 1221
crashtracking [candidate] (1.23 ms) : 0, 1230
BytebuddyAgent [baseline] (808.93 ms) : 0, 808930
BytebuddyAgent [candidate] (814.796 ms) : 0, 814796
AgentMeter [baseline] (11.462 ms) : 0, 11462
AgentMeter [candidate] (11.516 ms) : 0, 11516
GlobalTracer [baseline] (239.081 ms) : 0, 239081
GlobalTracer [candidate] (240.298 ms) : 0, 240298
IAST [baseline] (30.626 ms) : 0, 30626
IAST [candidate] (29.944 ms) : 0, 29944
AppSec [baseline] (28.265 ms) : 0, 28265
AppSec [candidate] (28.649 ms) : 0, 28649
Debugger [baseline] (63.43 ms) : 0, 63430
Debugger [candidate] (65.007 ms) : 0, 65007
Remote Config [baseline] (539.07 µs) : 0, 539
Remote Config [candidate] (541.654 µs) : 0, 542
Telemetry [baseline] (7.689 ms) : 0, 7689
Telemetry [candidate] (7.789 ms) : 0, 7789
Flare Poller [baseline] (3.363 ms) : 0, 3363
Flare Poller [candidate] (3.46 ms) : 0, 3460
section profiling
crashtracking [baseline] (1.197 ms) : 0, 1197
crashtracking [candidate] (1.18 ms) : 0, 1180
BytebuddyAgent [baseline] (695.205 ms) : 0, 695205
BytebuddyAgent [candidate] (691.17 ms) : 0, 691170
AgentMeter [baseline] (9.022 ms) : 0, 9022
AgentMeter [candidate] (8.984 ms) : 0, 8984
GlobalTracer [baseline] (208.975 ms) : 0, 208975
GlobalTracer [candidate] (207.248 ms) : 0, 207248
AppSec [baseline] (32.801 ms) : 0, 32801
AppSec [candidate] (32.572 ms) : 0, 32572
Debugger [baseline] (66.011 ms) : 0, 66011
Debugger [candidate] (65.276 ms) : 0, 65276
Remote Config [baseline] (592.756 µs) : 0, 593
Remote Config [candidate] (567.485 µs) : 0, 567
Telemetry [baseline] (7.848 ms) : 0, 7848
Telemetry [candidate] (7.801 ms) : 0, 7801
Flare Poller [baseline] (3.491 ms) : 0, 3491
Flare Poller [candidate] (3.461 ms) : 0, 3461
ProfilingAgent [baseline] (93.829 ms) : 0, 93829
ProfilingAgent [candidate] (93.399 ms) : 0, 93399
Profiling [baseline] (94.398 ms) : 0, 94398
Profiling [candidate] (93.961 ms) : 0, 93961
Loading
Startup time reports for insecure-bank 
gantt
    title insecure-bank - global startup overhead: candidate=1.61.0-SNAPSHOT~c1d9b0a4df, baseline=1.62.0-SNAPSHOT~8569434beb

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.059 s) : 0, 1059412
Total [baseline] (8.883 s) : 0, 8882515
Agent [candidate] (1.056 s) : 0, 1056185
Total [candidate] (8.837 s) : 0, 8836871
section iast
Agent [baseline] (1.233 s) : 0, 1232916
Total [baseline] (9.534 s) : 0, 9533677
Agent [candidate] (1.237 s) : 0, 1237393
Total [candidate] (9.608 s) : 0, 9608234
Loading
  • baseline results
Module Variant Duration Δ tracing
Agent tracing 1.059 s -
Agent iast 1.233 s 173.504 ms (16.4%)
Total tracing 8.883 s -
Total iast 9.534 s 651.162 ms (7.3%)
  • candidate results
Module Variant Duration Δ tracing
Agent tracing 1.056 s -
Agent iast 1.237 s 181.207 ms (17.2%)
Total tracing 8.837 s -
Total iast 9.608 s 771.363 ms (8.7%) 
gantt
    title insecure-bank - break down per module: candidate=1.61.0-SNAPSHOT~c1d9b0a4df, baseline=1.62.0-SNAPSHOT~8569434beb

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.228 ms) : 0, 1228
crashtracking [candidate] (1.23 ms) : 0, 1230
BytebuddyAgent [baseline] (633.829 ms) : 0, 633829
BytebuddyAgent [candidate] (632.845 ms) : 0, 632845
AgentMeter [baseline] (29.515 ms) : 0, 29515
AgentMeter [candidate] (29.224 ms) : 0, 29224
GlobalTracer [baseline] (250.365 ms) : 0, 250365
GlobalTracer [candidate] (248.328 ms) : 0, 248328
AppSec [baseline] (32.625 ms) : 0, 32625
AppSec [candidate] (32.307 ms) : 0, 32307
Debugger [baseline] (59.432 ms) : 0, 59432
Debugger [candidate] (59.405 ms) : 0, 59405
Remote Config [baseline] (600.127 µs) : 0, 600
Remote Config [candidate] (597.113 µs) : 0, 597
Telemetry [baseline] (8.125 ms) : 0, 8125
Telemetry [candidate] (7.984 ms) : 0, 7984
Flare Poller [baseline] (7.477 ms) : 0, 7477
Flare Poller [candidate] (8.085 ms) : 0, 8085
section iast
crashtracking [baseline] (1.236 ms) : 0, 1236
crashtracking [candidate] (1.237 ms) : 0, 1237
BytebuddyAgent [baseline] (810.213 ms) : 0, 810213
BytebuddyAgent [candidate] (814.266 ms) : 0, 814266
AgentMeter [baseline] (11.432 ms) : 0, 11432
AgentMeter [candidate] (11.479 ms) : 0, 11479
GlobalTracer [baseline] (239.199 ms) : 0, 239199
GlobalTracer [candidate] (239.731 ms) : 0, 239731
IAST [baseline] (30.207 ms) : 0, 30207
IAST [candidate] (30.065 ms) : 0, 30065
AppSec [baseline] (30.331 ms) : 0, 30331
AppSec [candidate] (26.662 ms) : 0, 26662
Debugger [baseline] (62.367 ms) : 0, 62367
Debugger [candidate] (65.17 ms) : 0, 65170
Remote Config [baseline] (532.495 µs) : 0, 532
Remote Config [candidate] (542.236 µs) : 0, 542
Telemetry [baseline] (7.758 ms) : 0, 7758
Telemetry [candidate] (7.847 ms) : 0, 7847
Flare Poller [baseline] (3.449 ms) : 0, 3449
Flare Poller [candidate] (3.417 ms) : 0, 3417
Loading

Load

Parameters

Baseline Candidate
baseline_or_candidate baseline candidate
git_branch master alexeyk/protocol-v1-1
git_commit_date 1776899365 1776953664
git_commit_sha 8569434 c1d9b0a
release_version 1.62.0-SNAPSHOT~8569434beb 1.61.0-SNAPSHOT~c1d9b0a4df
See matching parameters
Baseline Candidate
application insecure-bank insecure-bank
ci_job_date 1776955899 1776955899
ci_job_id 1624266363 1624266363
ci_pipeline_id 109311800 109311800
cpu_model Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version Linux runner-zfyrx7zua-project-304-concurrent-1-xjqe10qx 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux Linux runner-zfyrx7zua-project-304-concurrent-1-xjqe10qx 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Summary

Found 1 performance improvements and 0 performance regressions! Performance is the same for 20 metrics, 15 unstable metrics.

scenario Δ mean agg_http_req_duration_p50 Δ mean agg_http_req_duration_p95 Δ mean throughput candidate mean agg_http_req_duration_p50 candidate mean agg_http_req_duration_p95 candidate mean throughput baseline mean agg_http_req_duration_p50 baseline mean agg_http_req_duration_p95 baseline mean throughput
scenario:load:petclinic:code_origins:high_load better
[-1.576ms; -0.719ms] or [-8.552%; -3.900%]		 unsure
[-1411.894µs; -96.681µs] or [-4.782%; -0.327%]		 unstable
[-10.845op/s; +40.282op/s] or [-4.353%; +16.170%]		 17.278ms 28.772ms 263.844op/s 18.425ms 29.526ms 249.125op/s
Request duration reports for insecure-bank 
gantt
    title insecure-bank - request duration [CI 0.99] : candidate=1.61.0-SNAPSHOT~c1d9b0a4df, baseline=1.62.0-SNAPSHOT~8569434beb
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.261 ms) : 1249, 1274
.   : milestone, 1261,
iast (3.296 ms) : 3246, 3346
.   : milestone, 3296,
iast_FULL (6.056 ms) : 5993, 6118
.   : milestone, 6056,
iast_GLOBAL (3.819 ms) : 3757, 3881
.   : milestone, 3819,
profiling (2.348 ms) : 2325, 2372
.   : milestone, 2348,
tracing (1.893 ms) : 1877, 1909
.   : milestone, 1893,
section candidate
no_agent (1.248 ms) : 1236, 1261
.   : milestone, 1248,
iast (3.362 ms) : 3313, 3411
.   : milestone, 3362,
iast_FULL (6.092 ms) : 6030, 6154
.   : milestone, 6092,
iast_GLOBAL (3.639 ms) : 3587, 3692
.   : milestone, 3639,
profiling (2.179 ms) : 2157, 2201
.   : milestone, 2179,
tracing (1.943 ms) : 1926, 1961
.   : milestone, 1943,
Loading
  • baseline results
Variant Request duration [CI 0.99] Δ no_agent
no_agent 1.261 ms [1.249 ms, 1.274 ms] -
iast 3.296 ms [3.246 ms, 3.346 ms] 2.035 ms (161.4%)
iast_FULL 6.056 ms [5.993 ms, 6.118 ms] 4.794 ms (380.2%)
iast_GLOBAL 3.819 ms [3.757 ms, 3.881 ms] 2.558 ms (202.8%)
profiling 2.348 ms [2.325 ms, 2.372 ms] 1.087 ms (86.2%)
tracing 1.893 ms [1.877 ms, 1.909 ms] 632.19 µs (50.1%)
  • candidate results
Variant Request duration [CI 0.99] Δ no_agent
no_agent 1.248 ms [1.236 ms, 1.261 ms] -
iast 3.362 ms [3.313 ms, 3.411 ms] 2.113 ms (169.3%)
iast_FULL 6.092 ms [6.03 ms, 6.154 ms] 4.844 ms (388.0%)
iast_GLOBAL 3.639 ms [3.587 ms, 3.692 ms] 2.391 ms (191.5%)
profiling 2.179 ms [2.157 ms, 2.201 ms] 930.72 µs (74.6%)
tracing 1.943 ms [1.926 ms, 1.961 ms] 695.093 µs (55.7%)
Request duration reports for petclinic 
gantt
    title petclinic - request duration [CI 0.99] : candidate=1.61.0-SNAPSHOT~c1d9b0a4df, baseline=1.62.0-SNAPSHOT~8569434beb
    dateFormat X
    axisFormat %s
section baseline
no_agent (18.435 ms) : 18249, 18620
.   : milestone, 18435,
appsec (18.884 ms) : 18693, 19074
.   : milestone, 18884,
code_origins (18.731 ms) : 18547, 18916
.   : milestone, 18731,
iast (17.815 ms) : 17639, 17991
.   : milestone, 17815,
profiling (18.308 ms) : 18124, 18493
.   : milestone, 18308,
tracing (18.648 ms) : 18461, 18835
.   : milestone, 18648,
section candidate
no_agent (19.178 ms) : 18984, 19373
.   : milestone, 19178,
appsec (18.39 ms) : 18205, 18576
.   : milestone, 18390,
code_origins (17.682 ms) : 17505, 17858
.   : milestone, 17682,
iast (18.066 ms) : 17889, 18243
.   : milestone, 18066,
profiling (18.376 ms) : 18189, 18563
.   : milestone, 18376,
tracing (18.034 ms) : 17855, 18213
.   : milestone, 18034,
Loading
  • baseline results
Variant Request duration [CI 0.99] Δ no_agent
no_agent 18.435 ms [18.249 ms, 18.62 ms] -
appsec 18.884 ms [18.693 ms, 19.074 ms] 448.963 µs (2.4%)
code_origins 18.731 ms [18.547 ms, 18.916 ms] 296.744 µs (1.6%)
iast 17.815 ms [17.639 ms, 17.991 ms] -619.569 µs (-3.4%)
profiling 18.308 ms [18.124 ms, 18.493 ms] -126.287 µs (-0.7%)
tracing 18.648 ms [18.461 ms, 18.835 ms] 213.292 µs (1.2%)
  • candidate results
Variant Request duration [CI 0.99] Δ no_agent
no_agent 19.178 ms [18.984 ms, 19.373 ms] -
appsec 18.39 ms [18.205 ms, 18.576 ms] -788.1 µs (-4.1%)
code_origins 17.682 ms [17.505 ms, 17.858 ms] -1.497 ms (-7.8%)
iast 18.066 ms [17.889 ms, 18.243 ms] -1.112 ms (-5.8%)
profiling 18.376 ms [18.189 ms, 18.563 ms] -802.172 µs (-4.2%)
tracing 18.034 ms [17.855 ms, 18.213 ms] -1.145 ms (-6.0%)

Dacapo

Parameters

Baseline Candidate
baseline_or_candidate baseline candidate
git_branch master alexeyk/protocol-v1-1
git_commit_date 1776899365 1776953664
git_commit_sha 8569434 c1d9b0a
release_version 1.62.0-SNAPSHOT~8569434beb 1.61.0-SNAPSHOT~c1d9b0a4df
See matching parameters
Baseline Candidate
application biojava biojava
ci_job_date 1776955705 1776955705
ci_job_id 1624266367 1624266367
ci_pipeline_id 109311800 109311800
cpu_model Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version Linux runner-zfyrx7zua-project-304-concurrent-2-owjxxv80 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux Linux runner-zfyrx7zua-project-304-concurrent-2-owjxxv80 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Summary

Found 0 performance improvements and 0 performance regressions! Performance is the same for 11 metrics, 1 unstable metrics.

Execution time for biojava 
gantt
    title biojava - execution time [CI 0.99] : candidate=1.61.0-SNAPSHOT~c1d9b0a4df, baseline=1.62.0-SNAPSHOT~8569434beb
    dateFormat X
    axisFormat %s
section baseline
no_agent (14.778 s) : 14778000, 14778000
.   : milestone, 14778000,
appsec (14.769 s) : 14769000, 14769000
.   : milestone, 14769000,
iast (18.376 s) : 18376000, 18376000
.   : milestone, 18376000,
iast_GLOBAL (18.006 s) : 18006000, 18006000
.   : milestone, 18006000,
profiling (14.79 s) : 14790000, 14790000
.   : milestone, 14790000,
tracing (14.673 s) : 14673000, 14673000
.   : milestone, 14673000,
section candidate
no_agent (15.239 s) : 15239000, 15239000
.   : milestone, 15239000,
appsec (14.823 s) : 14823000, 14823000
.   : milestone, 14823000,
iast (18.979 s) : 18979000, 18979000
.   : milestone, 18979000,
iast_GLOBAL (18.155 s) : 18155000, 18155000
.   : milestone, 18155000,
profiling (15.276 s) : 15276000, 15276000
.   : milestone, 15276000,
tracing (15.022 s) : 15022000, 15022000
.   : milestone, 15022000,
Loading
  • baseline results
Variant Execution Time [CI 0.99] Δ no_agent
no_agent 14.778 s [14.778 s, 14.778 s] -
appsec 14.769 s [14.769 s, 14.769 s] -9.0 ms (-0.1%)
iast 18.376 s [18.376 s, 18.376 s] 3.598 s (24.3%)
iast_GLOBAL 18.006 s [18.006 s, 18.006 s] 3.228 s (21.8%)
profiling 14.79 s [14.79 s, 14.79 s] 12.0 ms (0.1%)
tracing 14.673 s [14.673 s, 14.673 s] -105.0 ms (-0.7%)
  • candidate results
Variant Execution Time [CI 0.99] Δ no_agent
no_agent 15.239 s [15.239 s, 15.239 s] -
appsec 14.823 s [14.823 s, 14.823 s] -416.0 ms (-2.7%)
iast 18.979 s [18.979 s, 18.979 s] 3.74 s (24.5%)
iast_GLOBAL 18.155 s [18.155 s, 18.155 s] 2.916 s (19.1%)
profiling 15.276 s [15.276 s, 15.276 s] 37.0 ms (0.2%)
tracing 15.022 s [15.022 s, 15.022 s] -217.0 ms (-1.4%)
Execution time for tomcat 
gantt
    title tomcat - execution time [CI 0.99] : candidate=1.61.0-SNAPSHOT~c1d9b0a4df, baseline=1.62.0-SNAPSHOT~8569434beb
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.485 ms) : 1473, 1496
.   : milestone, 1485,
appsec (3.759 ms) : 3542, 3977
.   : milestone, 3759,
iast (2.27 ms) : 2199, 2340
.   : milestone, 2270,
iast_GLOBAL (2.318 ms) : 2248, 2389
.   : milestone, 2318,
profiling (2.098 ms) : 2043, 2153
.   : milestone, 2098,
tracing (2.081 ms) : 2027, 2135
.   : milestone, 2081,
section candidate
no_agent (1.484 ms) : 1473, 1496
.   : milestone, 1484,
appsec (3.836 ms) : 3612, 4060
.   : milestone, 3836,
iast (2.275 ms) : 2204, 2345
.   : milestone, 2275,
iast_GLOBAL (2.322 ms) : 2251, 2393
.   : milestone, 2322,
profiling (2.098 ms) : 2042, 2153
.   : milestone, 2098,
tracing (2.079 ms) : 2025, 2133
.   : milestone, 2079,
Loading
  • baseline results
Variant Execution Time [CI 0.99] Δ no_agent
no_agent 1.485 ms [1.473 ms, 1.496 ms] -
appsec 3.759 ms [3.542 ms, 3.977 ms] 2.274 ms (153.2%)
iast 2.27 ms [2.199 ms, 2.34 ms] 784.765 µs (52.9%)
iast_GLOBAL 2.318 ms [2.248 ms, 2.389 ms] 833.492 µs (56.1%)
profiling 2.098 ms [2.043 ms, 2.153 ms] 613.429 µs (41.3%)
tracing 2.081 ms [2.027 ms, 2.135 ms] 596.324 µs (40.2%)
  • candidate results
Variant Execution Time [CI 0.99] Δ no_agent
no_agent 1.484 ms [1.473 ms, 1.496 ms] -
appsec 3.836 ms [3.612 ms, 4.06 ms] 2.352 ms (158.4%)
iast 2.275 ms [2.204 ms, 2.345 ms] 790.208 µs (53.2%)
iast_GLOBAL 2.322 ms [2.251 ms, 2.393 ms] 837.482 µs (56.4%)
profiling 2.098 ms [2.042 ms, 2.153 ms] 613.296 µs (41.3%)
tracing 2.079 ms [2.025 ms, 2.133 ms] 594.427 µs (40.0%)

@AlexeyKuznetsov-DD
Added process tags.
7d72919
@AlexeyKuznetsov-DD
Fixed first span metadata processing.
cd59310
@AlexeyKuznetsov-DD
Disable test temporary.
deab351
@AlexeyKuznetsov-DD
Forced to use v1 for testing.
549bef5
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
5e329c5
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
7d86270
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
e593140
@AlexeyKuznetsov-DD
Fixed mock server to support v1 and some renaming.
c55bed4
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
ca09892
@AlexeyKuznetsov-DD
Fixed v1 protocol emulation.
2e9fd4a
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
c12267b
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
c320eee
@AlexeyKuznetsov-DD
Added missing baggage. Fixed smoke tests.
c781a95
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
a2a31b6
@AlexeyKuznetsov-DD
Flatten attrs. Fixed tests.
0450392
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
c86443e
@AlexeyKuznetsov-DD
Top level.
882350a
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
68e07c2
@AlexeyKuznetsov-DD
Added /info point for mock server.
a1afc49
@AlexeyKuznetsov-DD
Merge branch 'master' into alexeyk/protocol-v1-1
c41c697
@AlexeyKuznetsov-DD
Refactored code duplication.
6f232d3
@AlexeyKuznetsov-DD
Refactored protocol version to be enum instead of string.
808761a
@AlexeyKuznetsov-DD
Fixed failed tests.
1a4021d
@AlexeyKuznetsov-DD
Fixed failed tests.
690427a
dougqh
dougqh approved these changes Apr 16, 2026
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Looks good to me.

I added a couple comments based on asking Claude to do a perf review.
I do think optimizing might the ID to byte conversion would be good.
I suspect that is where some (most?) of the extra 2GiB of byte[] were coming from.

But I'm fine with doing that in a separate pull request

@AlexeyKuznetsov-DD AlexeyKuznetsov-DD changed the title Protocol v1 Efficient Trace Payload Protocol (v1 protocol) Apr 22, 2026
mcculls
mcculls reviewed Apr 22, 2026
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Comment thread dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java Outdated
mcculls
mcculls reviewed Apr 22, 2026
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Comment thread dd-trace-api/src/main/java/datadog/trace/api/ProtocolVersion.java Outdated
mcculls
mcculls reviewed Apr 22, 2026
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Comment thread dd-trace-core/src/main/java/datadog/trace/common/writer/ddagent/TraceMapperV1.java Outdated
mcculls
mcculls reviewed Apr 22, 2026
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Comment thread dd-trace-core/src/main/java/datadog/trace/common/writer/ddagent/TraceMapperV1.java Outdated
mcculls
mcculls reviewed Apr 22, 2026
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Comment thread dd-trace-core/src/main/java/datadog/trace/common/writer/ddagent/TraceMapperV1.java Outdated
mcculls
mcculls approved these changes Apr 22, 2026
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LGTM, thanks for improving the protocol selection - and the test coverage

@AlexeyKuznetsov-DD
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AlexeyKuznetsov-DD commented Apr 23, 2026

/merge

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gh-worker-devflow-routing-ef8351 Bot commented Apr 23, 2026 •
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2026-04-23 15:13:36 UTC ℹ️ Start processing command /merge

2026-04-23 15:13:41 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in master is approximately 2h (p90).

2026-04-23 16:30:02 UTC ℹ️ MergeQueue: This merge request was merged

@gh-worker-dd-mergequeue-cf854d gh-worker-dd-mergequeue-cf854d Bot merged commit 9aedff2 into master Apr 23, 2026
571 checks passed
@gh-worker-dd-mergequeue-cf854d gh-worker-dd-mergequeue-cf854d Bot deleted the alexeyk/protocol-v1-1 branch April 23, 2026 16:30
@github-actions github-actions Bot added this to the 1.62.0 milestone Apr 23, 2026
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@mcculls mcculls mcculls approved these changes

@dougqh dougqh dougqh approved these changes

@claponcet claponcet Awaiting requested review from claponcet claponcet is a code owner automatically assigned from DataDog/asm-java

@daniel-romano-DD daniel-romano-DD Awaiting requested review from daniel-romano-DD daniel-romano-DD is a code owner automatically assigned from DataDog/asm-java

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@AlexeyKuznetsov-DD AlexeyKuznetsov-DD

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comp: core Tracer core tag: do not merge Do not merge changes type: enhancement Enhancements and improvements

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@AlexeyKuznetsov-DD @dougqh @mcculls