Using forEach to avoid Iterator allocation#10830

dougqh · 2026-03-12T20:08:03Z

What Does This Do

Use forEach in CoreTracer.write to avoid ArrayList$Itr allocation

Motivation

In span creation stress test: 16 threads x 10,000,000 traces x 2 spans, saves 5 GiB of allocation

Additional Notes

Contributor Checklist

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Jira ticket: [PROJ-IDENT]

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pr-commenter · 2026-03-12T21:03:53Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	dougqh/coretracer-preprocessing
git_commit_date	1773751598	1773756421
git_commit_sha	`99d47ca`	`68cc165`
release_version	1.61.0-SNAPSHOT~99d47ca835	1.61.0-SNAPSHOT~68cc165a41

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1773758244	1773758244
ci_job_id	1513074974	1513074974
ci_pipeline_id	102974503	102974503
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-wd5rixlb 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-wd5rixlb 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 65 metrics, 6 unstable metrics.

Startup time reports for insecure-bank

gantt
    title insecure-bank - global startup overhead: candidate=1.61.0-SNAPSHOT~68cc165a41, baseline=1.61.0-SNAPSHOT~99d47ca835

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.059 s) : 0, 1059141
Total [baseline] (8.845 s) : 0, 8844794
Agent [candidate] (1.058 s) : 0, 1057765
Total [candidate] (8.817 s) : 0, 8816519
section iast
Agent [baseline] (1.225 s) : 0, 1224891
Total [baseline] (9.557 s) : 0, 9556880
Agent [candidate] (1.225 s) : 0, 1225207
Total [candidate] (9.556 s) : 0, 9555973

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.059 s	-
Agent	iast	1.225 s	165.751 ms (15.6%)
Total	tracing	8.845 s	-
Total	iast	9.557 s	712.086 ms (8.1%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.058 s	-
Agent	iast	1.225 s	167.442 ms (15.8%)
Total	tracing	8.817 s	-
Total	iast	9.556 s	739.454 ms (8.4%)

gantt
    title insecure-bank - break down per module: candidate=1.61.0-SNAPSHOT~68cc165a41, baseline=1.61.0-SNAPSHOT~99d47ca835

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.203 ms) : 0, 1203
crashtracking [candidate] (1.198 ms) : 0, 1198
BytebuddyAgent [baseline] (628.547 ms) : 0, 628547
BytebuddyAgent [candidate] (627.002 ms) : 0, 627002
AgentMeter [baseline] (29.116 ms) : 0, 29116
AgentMeter [candidate] (28.904 ms) : 0, 28904
GlobalTracer [baseline] (256.566 ms) : 0, 256566
GlobalTracer [candidate] (256.496 ms) : 0, 256496
AppSec [baseline] (31.609 ms) : 0, 31609
AppSec [candidate] (31.603 ms) : 0, 31603
Debugger [baseline] (59.21 ms) : 0, 59210
Debugger [candidate] (59.234 ms) : 0, 59234
Remote Config [baseline] (592.826 µs) : 0, 593
Remote Config [candidate] (584.464 µs) : 0, 584
Telemetry [baseline] (8.06 ms) : 0, 8060
Telemetry [candidate] (8.068 ms) : 0, 8068
Flare Poller [baseline] (8.057 ms) : 0, 8057
Flare Poller [candidate] (8.692 ms) : 0, 8692
section iast
crashtracking [baseline] (1.206 ms) : 0, 1206
crashtracking [candidate] (1.206 ms) : 0, 1206
BytebuddyAgent [baseline] (794.19 ms) : 0, 794190
BytebuddyAgent [candidate] (795.082 ms) : 0, 795082
AgentMeter [baseline] (11.312 ms) : 0, 11312
AgentMeter [candidate] (11.359 ms) : 0, 11359
GlobalTracer [baseline] (247.175 ms) : 0, 247175
GlobalTracer [candidate] (247.141 ms) : 0, 247141
AppSec [baseline] (26.418 ms) : 0, 26418
AppSec [candidate] (26.322 ms) : 0, 26322
Debugger [baseline] (70.046 ms) : 0, 70046
Debugger [candidate] (69.835 ms) : 0, 69835
Remote Config [baseline] (533.027 µs) : 0, 533
Remote Config [candidate] (521.978 µs) : 0, 522
Telemetry [baseline] (9.203 ms) : 0, 9203
Telemetry [candidate] (9.121 ms) : 0, 9121
Flare Poller [baseline] (3.314 ms) : 0, 3314
Flare Poller [candidate] (3.319 ms) : 0, 3319
IAST [baseline] (25.307 ms) : 0, 25307
IAST [candidate] (25.262 ms) : 0, 25262

Startup time reports for petclinic

gantt
    title petclinic - global startup overhead: candidate=1.61.0-SNAPSHOT~68cc165a41, baseline=1.61.0-SNAPSHOT~99d47ca835

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.059 s) : 0, 1058664
Total [baseline] (11.016 s) : 0, 11016058
Agent [candidate] (1.057 s) : 0, 1056912
Total [candidate] (11.053 s) : 0, 11052997
section appsec
Agent [baseline] (1.247 s) : 0, 1246782
Total [baseline] (11.334 s) : 0, 11334077
Agent [candidate] (1.245 s) : 0, 1244992
Total [candidate] (11.243 s) : 0, 11242878
section iast
Agent [baseline] (1.225 s) : 0, 1224807
Total [baseline] (11.33 s) : 0, 11329804
Agent [candidate] (1.225 s) : 0, 1225460
Total [candidate] (11.382 s) : 0, 11381766
section profiling
Agent [baseline] (1.184 s) : 0, 1183640
Total [baseline] (11.134 s) : 0, 11133904
Agent [candidate] (1.182 s) : 0, 1181887
Total [candidate] (11.043 s) : 0, 11043038

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.059 s	-
Agent	appsec	1.247 s	188.119 ms (17.8%)
Agent	iast	1.225 s	166.143 ms (15.7%)
Agent	profiling	1.184 s	124.976 ms (11.8%)
Total	tracing	11.016 s	-
Total	appsec	11.334 s	318.019 ms (2.9%)
Total	iast	11.33 s	313.746 ms (2.8%)
Total	profiling	11.134 s	117.846 ms (1.1%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.057 s	-
Agent	appsec	1.245 s	188.079 ms (17.8%)
Agent	iast	1.225 s	168.548 ms (15.9%)
Agent	profiling	1.182 s	124.975 ms (11.8%)
Total	tracing	11.053 s	-
Total	appsec	11.243 s	189.881 ms (1.7%)
Total	iast	11.382 s	328.768 ms (3.0%)
Total	profiling	11.043 s	-9.959 ms (-0.1%)

gantt
    title petclinic - break down per module: candidate=1.61.0-SNAPSHOT~68cc165a41, baseline=1.61.0-SNAPSHOT~99d47ca835

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.204 ms) : 0, 1204
crashtracking [candidate] (1.191 ms) : 0, 1191
BytebuddyAgent [baseline] (627.654 ms) : 0, 627654
BytebuddyAgent [candidate] (626.776 ms) : 0, 626776
AgentMeter [baseline] (29.078 ms) : 0, 29078
AgentMeter [candidate] (28.97 ms) : 0, 28970
GlobalTracer [baseline] (256.81 ms) : 0, 256810
GlobalTracer [candidate] (256.637 ms) : 0, 256637
AppSec [baseline] (31.622 ms) : 0, 31622
AppSec [candidate] (31.54 ms) : 0, 31540
Debugger [baseline] (60.176 ms) : 0, 60176
Debugger [candidate] (59.953 ms) : 0, 59953
Remote Config [baseline] (596.253 µs) : 0, 596
Remote Config [candidate] (586.791 µs) : 0, 587
Telemetry [baseline] (8.086 ms) : 0, 8086
Telemetry [candidate] (7.999 ms) : 0, 7999
Flare Poller [baseline] (7.383 ms) : 0, 7383
Flare Poller [candidate] (7.257 ms) : 0, 7257
section appsec
crashtracking [baseline] (1.194 ms) : 0, 1194
crashtracking [candidate] (1.193 ms) : 0, 1193
BytebuddyAgent [baseline] (657.84 ms) : 0, 657840
BytebuddyAgent [candidate] (656.752 ms) : 0, 656752
AgentMeter [baseline] (12.04 ms) : 0, 12040
AgentMeter [candidate] (12.042 ms) : 0, 12042
GlobalTracer [baseline] (258.308 ms) : 0, 258308
GlobalTracer [candidate] (257.754 ms) : 0, 257754
AppSec [baseline] (177.864 ms) : 0, 177864
AppSec [candidate] (177.803 ms) : 0, 177803
Debugger [baseline] (66.368 ms) : 0, 66368
Debugger [candidate] (66.391 ms) : 0, 66391
Remote Config [baseline] (626.09 µs) : 0, 626
Remote Config [candidate] (615.693 µs) : 0, 616
Telemetry [baseline] (8.403 ms) : 0, 8403
Telemetry [candidate] (8.324 ms) : 0, 8324
Flare Poller [baseline] (3.637 ms) : 0, 3637
Flare Poller [candidate] (3.653 ms) : 0, 3653
IAST [baseline] (24.185 ms) : 0, 24185
IAST [candidate] (24.136 ms) : 0, 24136
section iast
crashtracking [baseline] (1.222 ms) : 0, 1222
crashtracking [candidate] (1.185 ms) : 0, 1185
BytebuddyAgent [baseline] (793.937 ms) : 0, 793937
BytebuddyAgent [candidate] (794.436 ms) : 0, 794436
AgentMeter [baseline] (11.304 ms) : 0, 11304
AgentMeter [candidate] (11.342 ms) : 0, 11342
GlobalTracer [baseline] (246.782 ms) : 0, 246782
GlobalTracer [candidate] (246.648 ms) : 0, 246648
AppSec [baseline] (26.496 ms) : 0, 26496
AppSec [candidate] (27.309 ms) : 0, 27309
Debugger [baseline] (70.658 ms) : 0, 70658
Debugger [candidate] (70.038 ms) : 0, 70038
Remote Config [baseline] (531.688 µs) : 0, 532
Remote Config [candidate] (531.171 µs) : 0, 531
Telemetry [baseline] (9.171 ms) : 0, 9171
Telemetry [candidate] (9.256 ms) : 0, 9256
Flare Poller [baseline] (3.331 ms) : 0, 3331
Flare Poller [candidate] (3.413 ms) : 0, 3413
IAST [baseline] (25.26 ms) : 0, 25260
IAST [candidate] (25.269 ms) : 0, 25269
section profiling
crashtracking [baseline] (1.178 ms) : 0, 1178
crashtracking [candidate] (1.167 ms) : 0, 1167
BytebuddyAgent [baseline] (683.494 ms) : 0, 683494
BytebuddyAgent [candidate] (683.004 ms) : 0, 683004
AgentMeter [baseline] (8.634 ms) : 0, 8634
AgentMeter [candidate] (8.607 ms) : 0, 8607
GlobalTracer [baseline] (215.458 ms) : 0, 215458
GlobalTracer [candidate] (215.158 ms) : 0, 215158
AppSec [baseline] (32.254 ms) : 0, 32254
AppSec [candidate] (32.227 ms) : 0, 32227
Debugger [baseline] (64.624 ms) : 0, 64624
Debugger [candidate] (62.077 ms) : 0, 62077
Remote Config [baseline] (589.079 µs) : 0, 589
Remote Config [candidate] (582.236 µs) : 0, 582
Telemetry [baseline] (8.434 ms) : 0, 8434
Telemetry [candidate] (9.976 ms) : 0, 9976
Flare Poller [baseline] (4.23 ms) : 0, 4230
Flare Poller [candidate] (5.026 ms) : 0, 5026
ProfilingAgent [baseline] (93.895 ms) : 0, 93895
ProfilingAgent [candidate] (93.414 ms) : 0, 93414
Profiling [baseline] (94.462 ms) : 0, 94462
Profiling [candidate] (93.972 ms) : 0, 93972

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	dougqh/coretracer-preprocessing
git_commit_date	1773751598	1773756421
git_commit_sha	`99d47ca`	`68cc165`
release_version	1.61.0-SNAPSHOT~99d47ca835	1.61.0-SNAPSHOT~68cc165a41

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1773758710	1773758710
ci_job_id	1513074981	1513074981
ci_pipeline_id	102974503	102974503
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-ly16zkqn 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-ly16zkqn 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 3 performance improvements and 2 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:profiling:high_load	better [-203.077µs; -76.237µs] or [-11.592%; -4.352%]	unstable [-1220.780µs; -403.968µs] or [-22.904%; -7.579%]	unstable [+2.892op/s; +523.983op/s] or [+0.142%; +25.727%]	1.612ms	4.518ms	2300.156op/s	1.752ms	5.330ms	2036.719op/s
scenario:load:insecure-bank:iast:high_load	worse [+129.140µs; +250.205µs] or [+5.370%; +10.404%]	unsure [+131.377µs; +715.417µs] or [+1.826%; +9.943%]	unstable [-257.429op/s; +59.429op/s] or [-17.537%; +4.048%]	2.595ms	7.618ms	1368.938op/s	2.405ms	7.195ms	1467.938op/s
scenario:load:petclinic:profiling:high_load	worse [+482.091µs; +1317.955µs] or [+2.627%; +7.181%]	same [-59.817µs; +1428.380µs] or [-0.203%; +4.837%]	unstable [-35.797op/s; +15.984op/s] or [-14.271%; +6.372%]	19.253ms	30.216ms	240.938op/s	18.353ms	29.531ms	250.844op/s
scenario:load:petclinic:no_agent:high_load	better [-2.903ms; -1.298ms] or [-15.422%; -6.897%]	better [-4.340ms; -1.362ms] or [-13.958%; -4.381%]	unstable [-0.409op/s; +56.471op/s] or [-0.168%; +23.165%]	16.720ms	28.243ms	271.812op/s	18.821ms	31.094ms	243.781op/s

Request duration reports for insecure-bank

gantt
    title insecure-bank - request duration [CI 0.99] : candidate=1.61.0-SNAPSHOT~68cc165a41, baseline=1.61.0-SNAPSHOT~99d47ca835
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.203 ms) : 1191, 1215
.   : milestone, 1203,
iast (3.113 ms) : 3076, 3151
.   : milestone, 3113,
iast_FULL (5.943 ms) : 5883, 6003
.   : milestone, 5943,
iast_GLOBAL (3.616 ms) : 3557, 3676
.   : milestone, 3616,
profiling (2.224 ms) : 2203, 2245
.   : milestone, 2224,
tracing (1.778 ms) : 1764, 1792
.   : milestone, 1778,
section candidate
no_agent (1.191 ms) : 1179, 1203
.   : milestone, 1191,
iast (3.346 ms) : 3296, 3395
.   : milestone, 3346,
iast_FULL (6.035 ms) : 5972, 6097
.   : milestone, 6035,
iast_GLOBAL (3.634 ms) : 3573, 3695
.   : milestone, 3634,
profiling (1.962 ms) : 1944, 1979
.   : milestone, 1962,
tracing (1.835 ms) : 1819, 1851
.   : milestone, 1835,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.203 ms [1.191 ms, 1.215 ms]	-
iast	3.113 ms [3.076 ms, 3.151 ms]	1.91 ms (158.8%)
iast_FULL	5.943 ms [5.883 ms, 6.003 ms]	4.74 ms (394.1%)
iast_GLOBAL	3.616 ms [3.557 ms, 3.676 ms]	2.413 ms (200.6%)
profiling	2.224 ms [2.203 ms, 2.245 ms]	1.021 ms (84.9%)
tracing	1.778 ms [1.764 ms, 1.792 ms]	575.57 µs (47.9%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.191 ms [1.179 ms, 1.203 ms]	-
iast	3.346 ms [3.296 ms, 3.395 ms]	2.154 ms (180.8%)
iast_FULL	6.035 ms [5.972 ms, 6.097 ms]	4.843 ms (406.5%)
iast_GLOBAL	3.634 ms [3.573 ms, 3.695 ms]	2.443 ms (205.0%)
profiling	1.962 ms [1.944 ms, 1.979 ms]	770.259 µs (64.7%)
tracing	1.835 ms [1.819 ms, 1.851 ms]	643.979 µs (54.1%)

Request duration reports for petclinic

gantt
    title petclinic - request duration [CI 0.99] : candidate=1.61.0-SNAPSHOT~68cc165a41, baseline=1.61.0-SNAPSHOT~99d47ca835
    dateFormat X
    axisFormat %s
section baseline
no_agent (19.148 ms) : 18949, 19347
.   : milestone, 19148,
appsec (18.486 ms) : 18296, 18675
.   : milestone, 18486,
code_origins (17.507 ms) : 17332, 17682
.   : milestone, 17507,
iast (17.746 ms) : 17569, 17922
.   : milestone, 17746,
profiling (18.609 ms) : 18426, 18793
.   : milestone, 18609,
tracing (17.771 ms) : 17591, 17952
.   : milestone, 17771,
section candidate
no_agent (17.164 ms) : 16994, 17335
.   : milestone, 17164,
appsec (18.512 ms) : 18325, 18698
.   : milestone, 18512,
code_origins (17.706 ms) : 17534, 17877
.   : milestone, 17706,
iast (17.485 ms) : 17310, 17661
.   : milestone, 17485,
profiling (19.371 ms) : 19183, 19559
.   : milestone, 19371,
tracing (17.62 ms) : 17447, 17792
.   : milestone, 17620,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	19.148 ms [18.949 ms, 19.347 ms]	-
appsec	18.486 ms [18.296 ms, 18.675 ms]	-662.421 µs (-3.5%)
code_origins	17.507 ms [17.332 ms, 17.682 ms]	-1.641 ms (-8.6%)
iast	17.746 ms [17.569 ms, 17.922 ms]	-1.402 ms (-7.3%)
profiling	18.609 ms [18.426 ms, 18.793 ms]	-538.782 µs (-2.8%)
tracing	17.771 ms [17.591 ms, 17.952 ms]	-1.377 ms (-7.2%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	17.164 ms [16.994 ms, 17.335 ms]	-
appsec	18.512 ms [18.325 ms, 18.698 ms]	1.347 ms (7.9%)
code_origins	17.706 ms [17.534 ms, 17.877 ms]	541.272 µs (3.2%)
iast	17.485 ms [17.31 ms, 17.661 ms]	320.936 µs (1.9%)
profiling	19.371 ms [19.183 ms, 19.559 ms]	2.207 ms (12.9%)
tracing	17.62 ms [17.447 ms, 17.792 ms]	455.224 µs (2.7%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	dougqh/coretracer-preprocessing
git_commit_date	1773751598	1773756421
git_commit_sha	`99d47ca`	`68cc165`
release_version	1.61.0-SNAPSHOT~99d47ca835	1.61.0-SNAPSHOT~68cc165a41

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1773758438	1773758438
ci_job_id	1513074989	1513074989
ci_pipeline_id	102974503	102974503
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-1-5lcos496 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-1-5lcos496 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~68cc165a41, baseline=1.61.0-SNAPSHOT~99d47ca835
    dateFormat X
    axisFormat %s
section baseline
no_agent (14.996 s) : 14996000, 14996000
.   : milestone, 14996000,
appsec (14.596 s) : 14596000, 14596000
.   : milestone, 14596000,
iast (18.04 s) : 18040000, 18040000
.   : milestone, 18040000,
iast_GLOBAL (18.006 s) : 18006000, 18006000
.   : milestone, 18006000,
profiling (15.069 s) : 15069000, 15069000
.   : milestone, 15069000,
tracing (14.863 s) : 14863000, 14863000
.   : milestone, 14863000,
section candidate
no_agent (15.763 s) : 15763000, 15763000
.   : milestone, 15763000,
appsec (14.722 s) : 14722000, 14722000
.   : milestone, 14722000,
iast (18.314 s) : 18314000, 18314000
.   : milestone, 18314000,
iast_GLOBAL (17.883 s) : 17883000, 17883000
.   : milestone, 17883000,
profiling (14.684 s) : 14684000, 14684000
.   : milestone, 14684000,
tracing (14.888 s) : 14888000, 14888000
.   : milestone, 14888000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	14.996 s [14.996 s, 14.996 s]	-
appsec	14.596 s [14.596 s, 14.596 s]	-400.0 ms (-2.7%)
iast	18.04 s [18.04 s, 18.04 s]	3.044 s (20.3%)
iast_GLOBAL	18.006 s [18.006 s, 18.006 s]	3.01 s (20.1%)
profiling	15.069 s [15.069 s, 15.069 s]	73.0 ms (0.5%)
tracing	14.863 s [14.863 s, 14.863 s]	-133.0 ms (-0.9%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.763 s [15.763 s, 15.763 s]	-
appsec	14.722 s [14.722 s, 14.722 s]	-1.041 s (-6.6%)
iast	18.314 s [18.314 s, 18.314 s]	2.551 s (16.2%)
iast_GLOBAL	17.883 s [17.883 s, 17.883 s]	2.12 s (13.4%)
profiling	14.684 s [14.684 s, 14.684 s]	-1.079 s (-6.8%)
tracing	14.888 s [14.888 s, 14.888 s]	-875.0 ms (-5.6%)

Execution time for tomcat

gantt
    title tomcat - execution time [CI 0.99] : candidate=1.61.0-SNAPSHOT~68cc165a41, baseline=1.61.0-SNAPSHOT~99d47ca835
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.481 ms) : 1469, 1492
.   : milestone, 1481,
appsec (3.795 ms) : 3576, 4015
.   : milestone, 3795,
iast (2.262 ms) : 2193, 2330
.   : milestone, 2262,
iast_GLOBAL (2.298 ms) : 2229, 2367
.   : milestone, 2298,
profiling (2.111 ms) : 2054, 2168
.   : milestone, 2111,
tracing (2.061 ms) : 2008, 2114
.   : milestone, 2061,
section candidate
no_agent (1.478 ms) : 1466, 1490
.   : milestone, 1478,
appsec (3.812 ms) : 3591, 4032
.   : milestone, 3812,
iast (2.258 ms) : 2189, 2327
.   : milestone, 2258,
iast_GLOBAL (2.302 ms) : 2233, 2372
.   : milestone, 2302,
profiling (2.082 ms) : 2027, 2137
.   : milestone, 2082,
tracing (2.069 ms) : 2016, 2123
.   : milestone, 2069,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.481 ms [1.469 ms, 1.492 ms]	-
appsec	3.795 ms [3.576 ms, 4.015 ms]	2.315 ms (156.3%)
iast	2.262 ms [2.193 ms, 2.33 ms]	780.951 µs (52.7%)
iast_GLOBAL	2.298 ms [2.229 ms, 2.367 ms]	817.264 µs (55.2%)
profiling	2.111 ms [2.054 ms, 2.168 ms]	630.412 µs (42.6%)
tracing	2.061 ms [2.008 ms, 2.114 ms]	580.06 µs (39.2%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.478 ms [1.466 ms, 1.49 ms]	-
appsec	3.812 ms [3.591 ms, 4.032 ms]	2.334 ms (157.9%)
iast	2.258 ms [2.189 ms, 2.327 ms]	780.181 µs (52.8%)
iast_GLOBAL	2.302 ms [2.233 ms, 2.372 ms]	824.178 µs (55.8%)
profiling	2.082 ms [2.027 ms, 2.137 ms]	604.066 µs (40.9%)
tracing	2.069 ms [2.016 ms, 2.123 ms]	591.225 µs (40.0%)

dougqh · 2026-03-13T12:58:13Z

In a separate PR, I'm going to try to create a benchmark to show why this happens.
In this case, the profile pretty clearly shows that escape analysis failed and the Iterator was being allocated, but that doesn't always happen. I think the difference is not fully inlining the call inside the loop, but I'd like to prove it.

dd-octo-sts · 2026-03-13T12:58:34Z

/merge

gh-worker-devflow-routing-ef8351 · 2026-03-13T12:58:38Z

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dd-octo-sts · 2026-03-17T16:40:11Z

/merge

gh-worker-devflow-routing-ef8351 · 2026-03-17T16:40:16Z

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The expected merge time in master is approximately 3h (p90).

2026-03-17 18:09:05 UTC ℹ️ MergeQueue: This merge request was merged

Using forEach to avoid Iterator allocation

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dougqh requested a review from a team as a code owner March 12, 2026 20:08

dougqh added type: enhancement Enhancements and improvements comp: core Tracer core labels Mar 12, 2026

dougqh requested a review from mhlidd March 12, 2026 20:08

dougqh added the tag: performance Performance related changes label Mar 12, 2026

spotless

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PerfectSlayer approved these changes Mar 13, 2026

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Merge branch 'master' into dougqh/coretracer-preprocessing

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dougqh enabled auto-merge March 13, 2026 19:11

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Merge branch 'master' into dougqh/coretracer-preprocessing

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Merge branch 'master' into dougqh/coretracer-preprocessing

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dougqh added this pull request to the merge queue Mar 17, 2026

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gh-worker-dd-mergequeue-cf854d bot merged commit cfeaf23 into master Mar 17, 2026
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Using forEach to avoid Iterator allocation#10830