Provide optimized writers for OpenTelemetry's "metrics.proto" wire protocol by mcculls · Pull Request #10983 · DataDog/dd-trace-java

mcculls · 2026-03-27T14:50:17Z

What Does This Do

Uses a single temporary buffer to prepare message chunks at different nesting levels (resource / scope / metric)

First we chunk all data points for a given metric. Once the metric is complete we add the first part of the metric message and its chunked data points to the scoped chunks. Once the scope is complete we add the first part of the scoped metrics message and all its chunks (metric messages and data points) to the payload. Once all the metrics data has been chunked we add the enclosing resource metrics message to the start of the payload.

Motivation

Avoids need to use full protobuf library while keeping intermediate array creation to a minimum.

Contributor Checklist

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Jira ticket: [PROJ-IDENT]

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… bytes to marshal

…otocol

instead just create a small prefix and re-use the resource chunk as-is

pr-commenter · 2026-03-27T16:22:34Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mcculls/otlp-metrics-proto
git_commit_date	1774619422	1774831701
git_commit_sha	`1abe140`	`2270ed6`
release_version	1.61.0-SNAPSHOT~1abe140bde	1.61.0-SNAPSHOT~2270ed63e0

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1774833965	1774833965
ci_job_id	1548720785	1548720785
ci_pipeline_id	104954737	104954737
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-0-6b27tfpg 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-0-6b27tfpg 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 64 metrics, 7 unstable metrics.

Startup time reports for insecure-bank

gantt
title insecure-bank - global startup overhead: candidate=1.61.0-SNAPSHOT~2270ed63e0, baseline=1.61.0-SNAPSHOT~1abe140bde
dateFormat X
axisFormat %s
section tracing
Agent [baseline] (1.054 s) : 0, 1053856
Total [baseline] (8.824 s) : 0, 8824317
Agent [candidate] (1.054 s) : 0, 1053811
Total [candidate] (8.806 s) : 0, 8805848
section iast
Agent [baseline] (1.225 s) : 0, 1224533
Total [baseline] (9.555 s) : 0, 9554806
Agent [candidate] (1.227 s) : 0, 1226889
Total [candidate] (9.541 s) : 0, 9540739

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.054 s	-
Agent	iast	1.225 s	170.677 ms (16.2%)
Total	tracing	8.824 s	-
Total	iast	9.555 s	730.489 ms (8.3%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.054 s	-
Agent	iast	1.227 s	173.078 ms (16.4%)
Total	tracing	8.806 s	-
Total	iast	9.541 s	734.891 ms (8.3%)

gantt
title insecure-bank - break down per module: candidate=1.61.0-SNAPSHOT~2270ed63e0, baseline=1.61.0-SNAPSHOT~1abe140bde
dateFormat X
axisFormat %s
section tracing
crashtracking [baseline] (1.192 ms) : 0, 1192
crashtracking [candidate] (1.183 ms) : 0, 1183
BytebuddyAgent [baseline] (627.247 ms) : 0, 627247
BytebuddyAgent [candidate] (627.321 ms) : 0, 627321
AgentMeter [baseline] (29.297 ms) : 0, 29297
AgentMeter [candidate] (29.259 ms) : 0, 29259
GlobalTracer [baseline] (256.173 ms) : 0, 256173
GlobalTracer [candidate] (256.391 ms) : 0, 256391
AppSec [baseline] (31.735 ms) : 0, 31735
AppSec [candidate] (31.632 ms) : 0, 31632
Debugger [baseline] (59.398 ms) : 0, 59398
Debugger [candidate] (59.231 ms) : 0, 59231
Remote Config [baseline] (578.195 µs) : 0, 578
Remote Config [candidate] (592.45 µs) : 0, 592
Telemetry [baseline] (8.012 ms) : 0, 8012
Telemetry [candidate] (8.037 ms) : 0, 8037
Flare Poller [baseline] (4.229 ms) : 0, 4229
Flare Poller [candidate] (4.198 ms) : 0, 4198
section iast
crashtracking [baseline] (1.187 ms) : 0, 1187
crashtracking [candidate] (1.192 ms) : 0, 1192
BytebuddyAgent [baseline] (794.772 ms) : 0, 794772
BytebuddyAgent [candidate] (796.191 ms) : 0, 796191
AgentMeter [baseline] (11.365 ms) : 0, 11365
AgentMeter [candidate] (11.394 ms) : 0, 11394
GlobalTracer [baseline] (246.158 ms) : 0, 246158
GlobalTracer [candidate] (247.241 ms) : 0, 247241
AppSec [baseline] (26.573 ms) : 0, 26573
AppSec [candidate] (26.587 ms) : 0, 26587
Debugger [baseline] (68.015 ms) : 0, 68015
Debugger [candidate] (67.109 ms) : 0, 67109
Remote Config [baseline] (526.589 µs) : 0, 527
Remote Config [candidate] (521.104 µs) : 0, 521
Telemetry [baseline] (10.717 ms) : 0, 10717
Telemetry [candidate] (11.275 ms) : 0, 11275
Flare Poller [baseline] (3.796 ms) : 0, 3796
Flare Poller [candidate] (3.988 ms) : 0, 3988
IAST [baseline] (25.347 ms) : 0, 25347
IAST [candidate] (25.361 ms) : 0, 25361

Startup time reports for petclinic

gantt
title petclinic - global startup overhead: candidate=1.61.0-SNAPSHOT~2270ed63e0, baseline=1.61.0-SNAPSHOT~1abe140bde
dateFormat X
axisFormat %s
section tracing
Agent [baseline] (1.063 s) : 0, 1063486
Total [baseline] (10.999 s) : 0, 10998961
Agent [candidate] (1.057 s) : 0, 1057178
Total [candidate] (11.036 s) : 0, 11036197
section appsec
Agent [baseline] (1.248 s) : 0, 1247520
Total [baseline] (11.162 s) : 0, 11162362
Agent [candidate] (1.246 s) : 0, 1245934
Total [candidate] (11.154 s) : 0, 11153667
section iast
Agent [baseline] (1.23 s) : 0, 1230361
Total [baseline] (11.309 s) : 0, 11309489
Agent [candidate] (1.226 s) : 0, 1225980
Total [candidate] (11.267 s) : 0, 11267215
section profiling
Agent [baseline] (1.182 s) : 0, 1181505
Total [baseline] (11.043 s) : 0, 11043316
Agent [candidate] (1.191 s) : 0, 1191190
Total [candidate] (11.056 s) : 0, 11056270

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.063 s	-
Agent	appsec	1.248 s	184.034 ms (17.3%)
Agent	iast	1.23 s	166.875 ms (15.7%)
Agent	profiling	1.182 s	118.019 ms (11.1%)
Total	tracing	10.999 s	-
Total	appsec	11.162 s	163.402 ms (1.5%)
Total	iast	11.309 s	310.528 ms (2.8%)
Total	profiling	11.043 s	44.355 ms (0.4%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.057 s	-
Agent	appsec	1.246 s	188.756 ms (17.9%)
Agent	iast	1.226 s	168.801 ms (16.0%)
Agent	profiling	1.191 s	134.012 ms (12.7%)
Total	tracing	11.036 s	-
Total	appsec	11.154 s	117.47 ms (1.1%)
Total	iast	11.267 s	231.018 ms (2.1%)
Total	profiling	11.056 s	20.073 ms (0.2%)

gantt
title petclinic - break down per module: candidate=1.61.0-SNAPSHOT~2270ed63e0, baseline=1.61.0-SNAPSHOT~1abe140bde
dateFormat X
axisFormat %s
section tracing
crashtracking [baseline] (1.196 ms) : 0, 1196
crashtracking [candidate] (1.203 ms) : 0, 1203
BytebuddyAgent [baseline] (632.802 ms) : 0, 632802
BytebuddyAgent [candidate] (628.613 ms) : 0, 628613
AgentMeter [baseline] (29.634 ms) : 0, 29634
AgentMeter [candidate] (29.35 ms) : 0, 29350
GlobalTracer [baseline] (258.013 ms) : 0, 258013
GlobalTracer [candidate] (256.795 ms) : 0, 256795
AppSec [baseline] (31.994 ms) : 0, 31994
AppSec [candidate] (31.893 ms) : 0, 31893
Debugger [baseline] (60.852 ms) : 0, 60852
Debugger [candidate] (60.376 ms) : 0, 60376
Remote Config [baseline] (585.617 µs) : 0, 586
Remote Config [candidate] (583.852 µs) : 0, 584
Telemetry [baseline] (8.068 ms) : 0, 8068
Telemetry [candidate] (8.839 ms) : 0, 8839
Flare Poller [baseline] (4.276 ms) : 0, 4276
Flare Poller [candidate] (3.554 ms) : 0, 3554
section appsec
crashtracking [baseline] (1.193 ms) : 0, 1193
crashtracking [candidate] (1.183 ms) : 0, 1183
BytebuddyAgent [baseline] (659.683 ms) : 0, 659683
BytebuddyAgent [candidate] (658.304 ms) : 0, 658304
AgentMeter [baseline] (12.143 ms) : 0, 12143
AgentMeter [candidate] (12.168 ms) : 0, 12168
GlobalTracer [baseline] (257.627 ms) : 0, 257627
GlobalTracer [candidate] (257.556 ms) : 0, 257556
IAST [baseline] (24.124 ms) : 0, 24124
IAST [candidate] (24.13 ms) : 0, 24130
AppSec [baseline] (177.557 ms) : 0, 177557
AppSec [candidate] (177.8 ms) : 0, 177800
Debugger [baseline] (66.432 ms) : 0, 66432
Debugger [candidate] (66.21 ms) : 0, 66210
Remote Config [baseline] (629.528 µs) : 0, 630
Remote Config [candidate] (625.355 µs) : 0, 625
Telemetry [baseline] (8.305 ms) : 0, 8305
Telemetry [candidate] (8.268 ms) : 0, 8268
Flare Poller [baseline] (3.559 ms) : 0, 3559
Flare Poller [candidate] (3.508 ms) : 0, 3508
section iast
crashtracking [baseline] (1.193 ms) : 0, 1193
crashtracking [candidate] (1.185 ms) : 0, 1185
BytebuddyAgent [baseline] (798.443 ms) : 0, 798443
BytebuddyAgent [candidate] (795.935 ms) : 0, 795935
AgentMeter [baseline] (11.421 ms) : 0, 11421
AgentMeter [candidate] (11.423 ms) : 0, 11423
GlobalTracer [baseline] (247.0 ms) : 0, 247000
GlobalTracer [candidate] (246.385 ms) : 0, 246385
IAST [baseline] (25.319 ms) : 0, 25319
IAST [candidate] (25.297 ms) : 0, 25297
AppSec [baseline] (26.513 ms) : 0, 26513
AppSec [candidate] (26.512 ms) : 0, 26512
Debugger [baseline] (71.049 ms) : 0, 71049
Debugger [candidate] (70.064 ms) : 0, 70064
Remote Config [baseline] (534.7 µs) : 0, 535
Remote Config [candidate] (523.453 µs) : 0, 523
Telemetry [baseline] (9.242 ms) : 0, 9242
Telemetry [candidate] (9.224 ms) : 0, 9224
Flare Poller [baseline] (3.383 ms) : 0, 3383
Flare Poller [candidate] (3.402 ms) : 0, 3402
section profiling
crashtracking [baseline] (1.165 ms) : 0, 1165
crashtracking [candidate] (1.182 ms) : 0, 1182
BytebuddyAgent [baseline] (682.923 ms) : 0, 682923
BytebuddyAgent [candidate] (687.849 ms) : 0, 687849
AgentMeter [baseline] (9.008 ms) : 0, 9008
AgentMeter [candidate] (9.04 ms) : 0, 9040
GlobalTracer [baseline] (214.47 ms) : 0, 214470
GlobalTracer [candidate] (216.269 ms) : 0, 216269
AppSec [baseline] (32.223 ms) : 0, 32223
AppSec [candidate] (32.555 ms) : 0, 32555
Debugger [baseline] (65.618 ms) : 0, 65618
Debugger [candidate] (64.739 ms) : 0, 64739
Remote Config [baseline] (566.847 µs) : 0, 567
Remote Config [candidate] (578.444 µs) : 0, 578
Telemetry [baseline] (7.744 ms) : 0, 7744
Telemetry [candidate] (8.627 ms) : 0, 8627
Flare Poller [baseline] (3.506 ms) : 0, 3506
Flare Poller [candidate] (4.377 ms) : 0, 4377
ProfilingAgent [baseline] (93.49 ms) : 0, 93490
ProfilingAgent [candidate] (94.754 ms) : 0, 94754
Profiling [baseline] (94.045 ms) : 0, 94045
Profiling [candidate] (95.32 ms) : 0, 95320

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mcculls/otlp-metrics-proto
git_commit_date	1774619422	1774831701
git_commit_sha	`1abe140`	`2270ed6`
release_version	1.61.0-SNAPSHOT~1abe140bde	1.61.0-SNAPSHOT~2270ed63e0

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1774834445	1774834445
ci_job_id	1548720786	1548720786
ci_pipeline_id	104954737	104954737
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-thgrxckp 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-thgrxckp 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 4 performance improvements and 1 performance regressions! Performance is the same for 16 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:insecure-bank:iast_FULL:high_load	unsure [+89.735µs; +376.510µs] or [+1.764%; +7.400%]	worse [+364.374µs; +981.820µs] or [+3.014%; +8.121%]	unstable [-122.657op/s; +38.470op/s] or [-15.157%; +4.754%]	5.321ms	12.763ms	767.156op/s	5.088ms	12.090ms	809.250op/s
scenario:load:petclinic:no_agent:high_load	better [-2.509ms; -1.061ms] or [-13.090%; -5.534%]	better [-3.671ms; -0.774ms] or [-11.539%; -2.432%]	unstable [-7.350op/s; +49.537op/s] or [-3.084%; +20.789%]	17.383ms	29.592ms	259.375op/s	19.167ms	31.814ms	238.281op/s
scenario:load:petclinic:profiling:high_load	better [-1.691ms; -0.777ms] or [-8.805%; -4.048%]	better [-2.660ms; -0.967ms] or [-8.595%; -3.123%]	unstable [-11.677op/s; +42.114op/s] or [-4.886%; +17.621%]	17.971ms	29.141ms	254.219op/s	19.205ms	30.955ms	239.000op/s

Request duration reports for insecure-bank

gantt
title insecure-bank - request duration [CI 0.99] : candidate=1.61.0-SNAPSHOT~2270ed63e0, baseline=1.61.0-SNAPSHOT~1abe140bde
dateFormat X
axisFormat %s
section baseline
no_agent (1.215 ms) : 1201, 1229
. : milestone, 1215,
iast (3.302 ms) : 3255, 3349
. : milestone, 3302,
iast_FULL (5.714 ms) : 5657, 5770
. : milestone, 5714,
iast_GLOBAL (3.519 ms) : 3454, 3583
. : milestone, 3519,
profiling (2.363 ms) : 2339, 2386
. : milestone, 2363,
tracing (1.802 ms) : 1787, 1816
. : milestone, 1802,
section candidate
no_agent (1.172 ms) : 1161, 1184
. : milestone, 1172,
iast (3.188 ms) : 3142, 3235
. : milestone, 3188,
iast_FULL (6.028 ms) : 5967, 6090
. : milestone, 6028,
iast_GLOBAL (3.572 ms) : 3513, 3632
. : milestone, 3572,
profiling (2.16 ms) : 2139, 2180
. : milestone, 2160,
tracing (1.797 ms) : 1782, 1812
. : milestone, 1797,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.215 ms [1.201 ms, 1.229 ms]	-
iast	3.302 ms [3.255 ms, 3.349 ms]	2.087 ms (171.8%)
iast_FULL	5.714 ms [5.657 ms, 5.77 ms]	4.499 ms (370.3%)
iast_GLOBAL	3.519 ms [3.454 ms, 3.583 ms]	2.304 ms (189.6%)
profiling	2.363 ms [2.339 ms, 2.386 ms]	1.148 ms (94.5%)
tracing	1.802 ms [1.787 ms, 1.816 ms]	586.678 µs (48.3%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.172 ms [1.161 ms, 1.184 ms]	-
iast	3.188 ms [3.142 ms, 3.235 ms]	2.016 ms (171.9%)
iast_FULL	6.028 ms [5.967 ms, 6.09 ms]	4.856 ms (414.1%)
iast_GLOBAL	3.572 ms [3.513 ms, 3.632 ms]	2.4 ms (204.7%)
profiling	2.16 ms [2.139 ms, 2.18 ms]	987.052 µs (84.2%)
tracing	1.797 ms [1.782 ms, 1.812 ms]	624.716 µs (53.3%)

Request duration reports for petclinic

gantt
title petclinic - request duration [CI 0.99] : candidate=1.61.0-SNAPSHOT~2270ed63e0, baseline=1.61.0-SNAPSHOT~1abe140bde
dateFormat X
axisFormat %s
section baseline
no_agent (19.594 ms) : 19392, 19795
. : milestone, 19594,
appsec (18.809 ms) : 18616, 19003
. : milestone, 18809,
code_origins (18.072 ms) : 17892, 18252
. : milestone, 18072,
iast (17.744 ms) : 17567, 17920
. : milestone, 17744,
profiling (19.529 ms) : 19331, 19727
. : milestone, 19529,
tracing (17.585 ms) : 17408, 17762
. : milestone, 17585,
section candidate
no_agent (17.992 ms) : 17810, 18174
. : milestone, 17992,
appsec (18.777 ms) : 18584, 18969
. : milestone, 18777,
code_origins (17.79 ms) : 17614, 17967
. : milestone, 17790,
iast (17.766 ms) : 17586, 17946
. : milestone, 17766,
profiling (18.357 ms) : 18176, 18538
. : milestone, 18357,
tracing (17.771 ms) : 17594, 17949
. : milestone, 17771,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	19.594 ms [19.392 ms, 19.795 ms]	-
appsec	18.809 ms [18.616 ms, 19.003 ms]	-784.27 µs (-4.0%)
code_origins	18.072 ms [17.892 ms, 18.252 ms]	-1.522 ms (-7.8%)
iast	17.744 ms [17.567 ms, 17.92 ms]	-1.85 ms (-9.4%)
profiling	19.529 ms [19.331 ms, 19.727 ms]	-64.781 µs (-0.3%)
tracing	17.585 ms [17.408 ms, 17.762 ms]	-2.009 ms (-10.3%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	17.992 ms [17.81 ms, 18.174 ms]	-
appsec	18.777 ms [18.584 ms, 18.969 ms]	784.712 µs (4.4%)
code_origins	17.79 ms [17.614 ms, 17.967 ms]	-201.498 µs (-1.1%)
iast	17.766 ms [17.586 ms, 17.946 ms]	-225.577 µs (-1.3%)
profiling	18.357 ms [18.176 ms, 18.538 ms]	365.097 µs (2.0%)
tracing	17.771 ms [17.594 ms, 17.949 ms]	-220.644 µs (-1.2%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mcculls/otlp-metrics-proto
git_commit_date	1774619422	1774831701
git_commit_sha	`1abe140`	`2270ed6`
release_version	1.61.0-SNAPSHOT~1abe140bde	1.61.0-SNAPSHOT~2270ed63e0

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1774834289	1774834289
ci_job_id	1548720787	1548720787
ci_pipeline_id	104954737	104954737
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-1-6o80o3db 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-1-6o80o3db 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 11 metrics, 0 unstable metrics.

scenario	Δ mean execution_time	candidate mean execution_time	baseline mean execution_time
scenario:dacapo:tomcat:appsec	better [-1.448ms; -1.102ms] or [-38.072%; -28.965%]	2.529ms	3.804ms

Execution time for tomcat

gantt
title tomcat - execution time [CI 0.99] : candidate=1.61.0-SNAPSHOT~2270ed63e0, baseline=1.61.0-SNAPSHOT~1abe140bde
dateFormat X
axisFormat %s
section baseline
no_agent (1.479 ms) : 1467, 1491
. : milestone, 1479,
appsec (3.804 ms) : 3583, 4025
. : milestone, 3804,
iast (2.261 ms) : 2192, 2330
. : milestone, 2261,
iast_GLOBAL (2.304 ms) : 2235, 2373
. : milestone, 2304,
profiling (2.073 ms) : 2018, 2127
. : milestone, 2073,
tracing (2.073 ms) : 2020, 2127
. : milestone, 2073,
section candidate
no_agent (1.472 ms) : 1460, 1483
. : milestone, 1472,
appsec (2.529 ms) : 2474, 2584
. : milestone, 2529,
iast (2.264 ms) : 2195, 2333
. : milestone, 2264,
iast_GLOBAL (2.294 ms) : 2225, 2363
. : milestone, 2294,
profiling (2.078 ms) : 2024, 2132
. : milestone, 2078,
tracing (2.063 ms) : 2009, 2116
. : milestone, 2063,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.479 ms [1.467 ms, 1.491 ms]	-
appsec	3.804 ms [3.583 ms, 4.025 ms]	2.325 ms (157.2%)
iast	2.261 ms [2.192 ms, 2.33 ms]	782.431 µs (52.9%)
iast_GLOBAL	2.304 ms [2.235 ms, 2.373 ms]	824.763 µs (55.8%)
profiling	2.073 ms [2.018 ms, 2.127 ms]	593.699 µs (40.1%)
tracing	2.073 ms [2.02 ms, 2.127 ms]	594.433 µs (40.2%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.472 ms [1.46 ms, 1.483 ms]	-
appsec	2.529 ms [2.474 ms, 2.584 ms]	1.057 ms (71.8%)
iast	2.264 ms [2.195 ms, 2.333 ms]	792.576 µs (53.9%)
iast_GLOBAL	2.294 ms [2.225 ms, 2.363 ms]	822.478 µs (55.9%)
profiling	2.078 ms [2.024 ms, 2.132 ms]	606.161 µs (41.2%)
tracing	2.063 ms [2.009 ms, 2.116 ms]	590.868 µs (40.1%)

Execution time for biojava

gantt
title biojava - execution time [CI 0.99] : candidate=1.61.0-SNAPSHOT~2270ed63e0, baseline=1.61.0-SNAPSHOT~1abe140bde
dateFormat X
axisFormat %s
section baseline
no_agent (14.929 s) : 14929000, 14929000
. : milestone, 14929000,
appsec (14.625 s) : 14625000, 14625000
. : milestone, 14625000,
iast (18.209 s) : 18209000, 18209000
. : milestone, 18209000,
iast_GLOBAL (17.769 s) : 17769000, 17769000
. : milestone, 17769000,
profiling (14.947 s) : 14947000, 14947000
. : milestone, 14947000,
tracing (14.964 s) : 14964000, 14964000
. : milestone, 14964000,
section candidate
no_agent (14.772 s) : 14772000, 14772000
. : milestone, 14772000,
appsec (14.697 s) : 14697000, 14697000
. : milestone, 14697000,
iast (18.342 s) : 18342000, 18342000
. : milestone, 18342000,
iast_GLOBAL (17.8 s) : 17800000, 17800000
. : milestone, 17800000,
profiling (15.388 s) : 15388000, 15388000
. : milestone, 15388000,
tracing (14.838 s) : 14838000, 14838000
. : milestone, 14838000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	14.929 s [14.929 s, 14.929 s]	-
appsec	14.625 s [14.625 s, 14.625 s]	-304.0 ms (-2.0%)
iast	18.209 s [18.209 s, 18.209 s]	3.28 s (22.0%)
iast_GLOBAL	17.769 s [17.769 s, 17.769 s]	2.84 s (19.0%)
profiling	14.947 s [14.947 s, 14.947 s]	18.0 ms (0.1%)
tracing	14.964 s [14.964 s, 14.964 s]	35.0 ms (0.2%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	14.772 s [14.772 s, 14.772 s]	-
appsec	14.697 s [14.697 s, 14.697 s]	-75.0 ms (-0.5%)
iast	18.342 s [18.342 s, 18.342 s]	3.57 s (24.2%)
iast_GLOBAL	17.8 s [17.8 s, 17.8 s]	3.028 s (20.5%)
profiling	15.388 s [15.388 s, 15.388 s]	616.0 ms (4.2%)
tracing	14.838 s [14.838 s, 14.838 s]	66.0 ms (0.4%)

amarziali

Looks good. There are few rounding that should be anyway not a problem since they represent integer quantities

mcculls · 2026-03-30T07:38:29Z

/merge

gh-worker-devflow-routing-ef8351 · 2026-03-30T07:38:33Z

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2026-03-30 07:38:32 UTC ℹ️ Start processing command /merge

2026-03-30 07:38:37 UTC ℹ️ MergeQueue: pull request added to the queue

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

2026-03-30 09:11:16 UTC ℹ️ MergeQueue: This merge request was merged

mcculls added 3 commits March 27, 2026 14:46

Add metrics.proto for testing
c133ef6

Minor refactoring
67a96e0

Support recording OTLP messages where we know there will be remaining…
eb75547
… bytes to marshal

mcculls requested a review from a team as a code owner March 27, 2026 14:50

mcculls removed the request for review from a teamMarch 27, 2026 14:50

mcculls added the type: feature request label Mar 27, 2026

mcculls requested a review from mtoffl01 March 27, 2026 14:50

mcculls added tag: no release notes Changes to exclude from release notes inst: opentelemetry OpenTelemetry instrumentation labels Mar 27, 2026

mcculls requested a review from amarziali March 27, 2026 14:50

mcculls force-pushed the mcculls/otlp-metrics-proto branch from 7b895a0 to 3d5747cCompare March 27, 2026 14:53

mcculls added 2 commits March 27, 2026 14:54

Provide optimized writers for OpenTelemetry's "metrics.proto" wire pr…
e85ca82
…otocol

Add parameterized metrics.proto test written with assistance of claude
9a0b845

mcculls force-pushed the mcculls/otlp-metrics-proto branch from 3d5747c to 9a0b845Compare March 27, 2026 14:56

Avoid creating an extra array that alway copies in the canned resource;
77c6674
instead just create a small prefix and re-use the resource chunk as-is

amarziali approved these changes Mar 27, 2026
View reviewed changes

mcculls added 7 commits March 29, 2026 23:11

Minor refactoring
62d8369

Performance: use intrinsic to reverse byte order
1ba0dab

Performance: re-use temporary chunk collections across cycles
9af3961

Performance: use simple loop instead of stream
f6a7666

Performance: avoid repeated unboxing
f4b2fdb

Performance: combine size-computation loops
d7c9f53

Performance: avoid temporary array allocations just for elementSizes
2270ed6

gh-worker-dd-mergequeue-cf854dBot merged commit a8f5c3c into masterMar 30, 2026
565 checks passed

gh-worker-dd-mergequeue-cf854dBot deleted the mcculls/otlp-metrics-proto branch March 30, 2026 09:11

github-actionsBot added this to the 1.61.0 milestone Mar 30, 2026

mcculls mentioned this pull request Apr 15, 2026
Provide optimized writers for OpenTelemetry's "trace.proto" wire protocol #11120
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Provide optimized writers for OpenTelemetry's "metrics.proto" wire protocol - #10983

Provide optimized writers for OpenTelemetry's "metrics.proto" wire protocol#10983
gh-worker-dd-mergequeue-cf854d[bot] merged 13 commits into
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mcculls commented Mar 27, 2026

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