Avoid final field mutation in UnsafeUtils by sarahchen6 · Pull Request #10476 · DataDog/dd-trace-java

sarahchen6 · 2026-01-29T21:44:08Z

What Does This Do

When attempting to clone a final field using UnsafeUtils::cloneFields, skip and instead emit a debug warning that final fields cannot be mutated. Update tests to reflect this as well.

Motivation

Prepare for JEP 500 which disallows final field mutations.

Additional Notes

Contributor Checklist

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Jira ticket: https://datadoghq.atlassian.net/browse/APMLP-594

pr-commenter · 2026-01-29T22:42:15Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	sarahchen6/refactor-unsafe-utils-final-mutation
git_commit_date	1769704474	1770045266
git_commit_sha	`02cc483`	`83bde9a`
release_version	1.59.0-SNAPSHOT~02cc48359b	1.59.0-SNAPSHOT~83bde9a554

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1770047283	1770047283
ci_job_id	1393980604	1393980604
ci_pipeline_id	94105516	94105516
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-0-1kezt9jp 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-0-1kezt9jp 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 19 performance improvements and 7 performance regressions! Performance is the same for 39 metrics, 6 unstable metrics.

scenario	Δ mean execution_time	candidate mean execution_time	baseline mean execution_time
scenario:startup:insecure-bank:iast:Agent.start	better [-136.201ms; -108.985ms] or [-11.064%; -8.853%]	1.108s	1.231s
scenario:startup:insecure-bank:iast:BytebuddyAgent	better [-128.244ms; -104.512ms] or [-16.121%; -13.138%]	679.116ms	795.495ms
scenario:startup:insecure-bank:iast:AgentMeter	worse [+228.367µs; +553.117µs] or [+2.027%; +4.911%]	11.655ms	11.264ms
scenario:startup:insecure-bank:iast:Telemetry	worse [+1.451ms; +1.840ms] or [+16.701%; +21.186%]	10.332ms	8.686ms
scenario:startup:insecure-bank:tracing:Agent.start	better [-137.172ms; -106.698ms] or [-12.856%; -10.000%]	0.945s	1.067s
scenario:startup:insecure-bank:tracing:BytebuddyAgent	better [-113.362ms; -95.529ms] or [-18.074%; -15.231%]	522.759ms	627.205ms
scenario:startup:insecure-bank:tracing:GlobalTracer	better [-14.081ms; -6.803ms] or [-5.419%; -2.618%]	249.404ms	259.846ms
scenario:startup:petclinic:appsec:Agent.start	better [-142.250ms; -103.371ms] or [-11.438%; -8.312%]	1.121s	1.244s
scenario:startup:petclinic:appsec:BytebuddyAgent	better [-116.317ms; -95.890ms] or [-17.695%; -14.587%]	551.247ms	657.350ms
scenario:startup:petclinic:appsec:Debugger	better [-9.458ms; -6.506ms] or [-13.800%; -9.493%]	60.551ms	68.532ms
scenario:startup:petclinic:iast:Agent	better [-558.420ms; -313.818ms] or [-4.980%; -2.799%]	10.777s	11.213s
scenario:startup:petclinic:iast:Agent.start	better [-119.122ms; -109.636ms] or [-9.716%; -8.942%]	1.112s	1.226s
scenario:startup:petclinic:iast:BytebuddyAgent	better [-112.302ms; -105.551ms] or [-14.219%; -13.364%]	680.862ms	789.789ms
scenario:startup:petclinic:iast:AgentMeter	worse [+403.339µs; +536.769µs] or [+3.600%; +4.791%]	11.674ms	11.204ms
scenario:startup:petclinic:iast:AppSec	better [-8.884ms; -5.508ms] or [-25.776%; -15.980%]	27.269ms	34.465ms
scenario:startup:petclinic:profiling:Agent.start	better [-111.052ms; -99.456ms] or [-9.364%; -8.386%]	1.081s	1.186s
scenario:startup:petclinic:profiling:ProfilingAgent	worse [+2.816ms; +9.332ms] or [+2.820%; +9.343%]	105.958ms	99.884ms
scenario:startup:petclinic:profiling:BytebuddyAgent	better [-109.754ms; -104.809ms] or [-16.222%; -15.491%]	569.278ms	676.560ms
scenario:startup:petclinic:profiling:AppSec	worse [+0.688ms; +1.424ms] or [+2.135%; +4.420%]	33.263ms	32.208ms
scenario:startup:petclinic:profiling:Debugger	better [-7.677ms; -6.571ms] or [-11.327%; -9.695%]	60.655ms	67.779ms
scenario:startup:petclinic:profiling:Remote Config	worse [+44.764µs; +80.953µs] or [+7.523%; +13.606%]	657.859µs	595.001µs
scenario:startup:petclinic:profiling:Profiling	worse [+2.811ms; +9.339ms] or [+2.798%; +9.295%]	106.545ms	100.470ms
scenario:startup:petclinic:tracing:Agent	better [-641.012ms; -446.073ms] or [-5.872%; -4.086%]	10.373s	10.917s
scenario:startup:petclinic:tracing:Agent.start	better [-118.354ms; -109.506ms] or [-11.158%; -10.324%]	0.947s	1.061s
scenario:startup:petclinic:tracing:BytebuddyAgent	better [-104.161ms; -98.983ms] or [-16.681%; -15.852%]	522.858ms	624.430ms
scenario:startup:petclinic:tracing:GlobalTracer	better [-8.225ms; -6.031ms] or [-3.199%; -2.346%]	249.984ms	257.112ms

Startup time reports for petclinic

gantt
    title petclinic - global startup overhead: candidate=1.59.0-SNAPSHOT~83bde9a554, baseline=1.59.0-SNAPSHOT~02cc48359b

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.061 s) : 0, 1060732
Total [baseline] (10.917 s) : 0, 10916726
Agent [candidate] (946.802 ms) : 0, 946802
Total [candidate] (10.373 s) : 0, 10373184
section appsec
Agent [baseline] (1.244 s) : 0, 1243614
Total [baseline] (11.037 s) : 0, 11036563
Agent [candidate] (1.121 s) : 0, 1120803
Total [candidate] (10.602 s) : 0, 10602370
section iast
Agent [baseline] (1.226 s) : 0, 1226019
Total [baseline] (11.213 s) : 0, 11212812
Agent [candidate] (1.112 s) : 0, 1111640
Total [candidate] (10.777 s) : 0, 10776693
section profiling
Agent [baseline] (1.186 s) : 0, 1185959
Total [baseline] (10.92 s) : 0, 10919726
Agent [candidate] (1.081 s) : 0, 1080705
Total [candidate] (10.569 s) : 0, 10569002

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.061 s	-
Agent	appsec	1.244 s	182.882 ms (17.2%)
Agent	iast	1.226 s	165.287 ms (15.6%)
Agent	profiling	1.186 s	125.226 ms (11.8%)
Total	tracing	10.917 s	-
Total	appsec	11.037 s	119.837 ms (1.1%)
Total	iast	11.213 s	296.086 ms (2.7%)
Total	profiling	10.92 s	3.0 ms (0.0%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	946.802 ms	-
Agent	appsec	1.121 s	174.001 ms (18.4%)
Agent	iast	1.112 s	164.837 ms (17.4%)
Agent	profiling	1.081 s	133.902 ms (14.1%)
Total	tracing	10.373 s	-
Total	appsec	10.602 s	229.186 ms (2.2%)
Total	iast	10.777 s	403.509 ms (3.9%)
Total	profiling	10.569 s	195.817 ms (1.9%)

gantt
    title petclinic - break down per module: candidate=1.59.0-SNAPSHOT~83bde9a554, baseline=1.59.0-SNAPSHOT~02cc48359b

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.181 ms) : 0, 1181
crashtracking [candidate] (1.23 ms) : 0, 1230
BytebuddyAgent [baseline] (624.43 ms) : 0, 624430
BytebuddyAgent [candidate] (522.858 ms) : 0, 522858
AgentMeter [baseline] (28.762 ms) : 0, 28762
AgentMeter [candidate] (28.648 ms) : 0, 28648
GlobalTracer [baseline] (257.112 ms) : 0, 257112
GlobalTracer [candidate] (249.984 ms) : 0, 249984
AppSec [baseline] (32.677 ms) : 0, 32677
AppSec [candidate] (32.787 ms) : 0, 32787
Debugger [baseline] (60.347 ms) : 0, 60347
Debugger [candidate] (61.623 ms) : 0, 61623
Remote Config [baseline] (637.521 µs) : 0, 638
Remote Config [candidate] (630.822 µs) : 0, 631
Telemetry [baseline] (10.813 ms) : 0, 10813
Telemetry [candidate] (9.278 ms) : 0, 9278
Flare Poller [baseline] (9.212 ms) : 0, 9212
Flare Poller [candidate] (3.772 ms) : 0, 3772
section appsec
crashtracking [baseline] (1.199 ms) : 0, 1199
crashtracking [candidate] (1.22 ms) : 0, 1220
BytebuddyAgent [baseline] (657.35 ms) : 0, 657350
BytebuddyAgent [candidate] (551.247 ms) : 0, 551247
AgentMeter [baseline] (11.969 ms) : 0, 11969
AgentMeter [candidate] (12.129 ms) : 0, 12129
GlobalTracer [baseline] (260.548 ms) : 0, 260548
GlobalTracer [candidate] (251.062 ms) : 0, 251062
IAST [baseline] (25.847 ms) : 0, 25847
IAST [candidate] (25.096 ms) : 0, 25096
AppSec [baseline] (168.77 ms) : 0, 168770
AppSec [candidate] (169.056 ms) : 0, 169056
Debugger [baseline] (68.532 ms) : 0, 68532
Debugger [candidate] (60.551 ms) : 0, 60551
Remote Config [baseline] (682.018 µs) : 0, 682
Remote Config [candidate] (666.101 µs) : 0, 666
Telemetry [baseline] (9.436 ms) : 0, 9436
Telemetry [candidate] (9.915 ms) : 0, 9915
Flare Poller [baseline] (3.725 ms) : 0, 3725
Flare Poller [candidate] (3.78 ms) : 0, 3780
section iast
crashtracking [baseline] (1.197 ms) : 0, 1197
crashtracking [candidate] (1.215 ms) : 0, 1215
BytebuddyAgent [baseline] (789.789 ms) : 0, 789789
BytebuddyAgent [candidate] (680.862 ms) : 0, 680862
AgentMeter [baseline] (11.204 ms) : 0, 11204
AgentMeter [candidate] (11.674 ms) : 0, 11674
GlobalTracer [baseline] (248.032 ms) : 0, 248032
GlobalTracer [candidate] (245.426 ms) : 0, 245426
IAST [baseline] (26.69 ms) : 0, 26690
IAST [candidate] (26.838 ms) : 0, 26838
AppSec [baseline] (34.465 ms) : 0, 34465
AppSec [candidate] (27.269 ms) : 0, 27269
Debugger [baseline] (66.446 ms) : 0, 66446
Debugger [candidate] (68.276 ms) : 0, 68276
Remote Config [baseline] (549.532 µs) : 0, 550
Remote Config [candidate] (548.897 µs) : 0, 549
Telemetry [baseline] (8.687 ms) : 0, 8687
Telemetry [candidate] (10.008 ms) : 0, 10008
Flare Poller [baseline] (3.604 ms) : 0, 3604
Flare Poller [candidate] (3.568 ms) : 0, 3568
section profiling
crashtracking [baseline] (1.215 ms) : 0, 1215
crashtracking [candidate] (1.196 ms) : 0, 1196
BytebuddyAgent [baseline] (676.56 ms) : 0, 676560
BytebuddyAgent [candidate] (569.278 ms) : 0, 569278
AgentMeter [baseline] (8.633 ms) : 0, 8633
AgentMeter [candidate] (8.803 ms) : 0, 8803
GlobalTracer [baseline] (216.613 ms) : 0, 216613
GlobalTracer [candidate] (217.666 ms) : 0, 217666
AppSec [baseline] (32.208 ms) : 0, 32208
AppSec [candidate] (33.263 ms) : 0, 33263
Debugger [baseline] (67.779 ms) : 0, 67779
Debugger [candidate] (60.655 ms) : 0, 60655
Remote Config [baseline] (595.001 µs) : 0, 595
Remote Config [candidate] (657.859 µs) : 0, 658
Telemetry [baseline] (8.855 ms) : 0, 8855
Telemetry [candidate] (9.002 ms) : 0, 9002
Flare Poller [baseline] (3.816 ms) : 0, 3816
Flare Poller [candidate] (3.717 ms) : 0, 3717
ProfilingAgent [baseline] (99.884 ms) : 0, 99884
ProfilingAgent [candidate] (105.958 ms) : 0, 105958
Profiling [baseline] (100.47 ms) : 0, 100470
Profiling [candidate] (106.545 ms) : 0, 106545

Startup time reports for insecure-bank

gantt
    title insecure-bank - global startup overhead: candidate=1.59.0-SNAPSHOT~83bde9a554, baseline=1.59.0-SNAPSHOT~02cc48359b

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.067 s) : 0, 1066953
Total [baseline] (8.774 s) : 0, 8774477
Agent [candidate] (945.018 ms) : 0, 945018
Total [candidate] (8.725 s) : 0, 8725428
section iast
Agent [baseline] (1.231 s) : 0, 1231033
Total [baseline] (9.421 s) : 0, 9420744
Agent [candidate] (1.108 s) : 0, 1108440
Total [candidate] (9.392 s) : 0, 9391712

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.067 s	-
Agent	iast	1.231 s	164.08 ms (15.4%)
Total	tracing	8.774 s	-
Total	iast	9.421 s	646.267 ms (7.4%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	945.018 ms	-
Agent	iast	1.108 s	163.422 ms (17.3%)
Total	tracing	8.725 s	-
Total	iast	9.392 s	666.284 ms (7.6%)

gantt
    title insecure-bank - break down per module: candidate=1.59.0-SNAPSHOT~83bde9a554, baseline=1.59.0-SNAPSHOT~02cc48359b

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.195 ms) : 0, 1195
crashtracking [candidate] (1.217 ms) : 0, 1217
BytebuddyAgent [baseline] (627.205 ms) : 0, 627205
BytebuddyAgent [candidate] (522.759 ms) : 0, 522759
AgentMeter [baseline] (28.982 ms) : 0, 28982
AgentMeter [candidate] (28.739 ms) : 0, 28739
GlobalTracer [baseline] (259.846 ms) : 0, 259846
GlobalTracer [candidate] (249.404 ms) : 0, 249404
AppSec [baseline] (33.22 ms) : 0, 33220
AppSec [candidate] (32.635 ms) : 0, 32635
Debugger [baseline] (63.214 ms) : 0, 63214
Debugger [candidate] (60.553 ms) : 0, 60553
Remote Config [baseline] (615.195 µs) : 0, 615
Remote Config [candidate] (631.519 µs) : 0, 632
Telemetry [baseline] (10.864 ms) : 0, 10864
Telemetry [candidate] (9.243 ms) : 0, 9243
Flare Poller [baseline] (6.098 ms) : 0, 6098
Flare Poller [candidate] (3.768 ms) : 0, 3768
section iast
crashtracking [baseline] (1.192 ms) : 0, 1192
crashtracking [candidate] (1.224 ms) : 0, 1224
BytebuddyAgent [baseline] (795.495 ms) : 0, 795495
BytebuddyAgent [candidate] (679.116 ms) : 0, 679116
AgentMeter [baseline] (11.264 ms) : 0, 11264
AgentMeter [candidate] (11.655 ms) : 0, 11655
GlobalTracer [baseline] (248.469 ms) : 0, 248469
GlobalTracer [candidate] (245.143 ms) : 0, 245143
IAST [baseline] (26.826 ms) : 0, 26826
IAST [candidate] (26.762 ms) : 0, 26762
AppSec [baseline] (33.708 ms) : 0, 33708
AppSec [candidate] (27.16 ms) : 0, 27160
Debugger [baseline] (65.81 ms) : 0, 65810
Debugger [candidate] (67.099 ms) : 0, 67099
Remote Config [baseline] (557.358 µs) : 0, 557
Remote Config [candidate] (567.333 µs) : 0, 567
Telemetry [baseline] (8.686 ms) : 0, 8686
Telemetry [candidate] (10.332 ms) : 0, 10332
Flare Poller [baseline] (3.553 ms) : 0, 3553
Flare Poller [candidate] (3.553 ms) : 0, 3553

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	sarahchen6/refactor-unsafe-utils-final-mutation
git_commit_date	1769704474	1770045266
git_commit_sha	`02cc483`	`83bde9a`
release_version	1.59.0-SNAPSHOT~02cc48359b	1.59.0-SNAPSHOT~83bde9a554

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1770047788	1770047788
ci_job_id	1393980606	1393980606
ci_pipeline_id	94105516	94105516
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-dbw54v21 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-dbw54v21 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 2 performance regressions! Performance is the same for 19 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	worse [+145.249µs; +354.076µs] or [+2.808%; +6.846%]	same [-47.521µs; +706.214µs] or [-0.380%; +5.643%]	unstable [-109.065op/s; +61.253op/s] or [-13.790%; +7.745%]	5.422ms	12.844ms	766.969op/s	5.172ms	12.515ms	790.875op/s
scenario:load:petclinic:iast:high_load	worse [+0.879ms; +1.811ms] or [+5.106%; +10.517%]	unsure [+0.326ms; +2.169ms] or [+1.141%; +7.600%]	unstable [-43.362op/s; +11.362op/s] or [-16.423%; +4.303%]	18.564ms	29.781ms	248.031op/s	17.219ms	28.534ms	264.031op/s

Request duration reports for petclinic

gantt
    title petclinic - request duration [CI 0.99] : candidate=1.59.0-SNAPSHOT~83bde9a554, baseline=1.59.0-SNAPSHOT~02cc48359b
    dateFormat X
    axisFormat %s
section baseline
no_agent (18.365 ms) : 18177, 18554
.   : milestone, 18365,
appsec (18.773 ms) : 18585, 18960
.   : milestone, 18773,
code_origins (17.724 ms) : 17548, 17901
.   : milestone, 17724,
iast (17.672 ms) : 17494, 17849
.   : milestone, 17672,
profiling (18.411 ms) : 18226, 18596
.   : milestone, 18411,
tracing (17.816 ms) : 17635, 17997
.   : milestone, 17816,
section candidate
no_agent (19.258 ms) : 19060, 19456
.   : milestone, 19258,
appsec (18.539 ms) : 18353, 18726
.   : milestone, 18539,
code_origins (17.872 ms) : 17692, 18052
.   : milestone, 17872,
iast (18.817 ms) : 18627, 19007
.   : milestone, 18817,
profiling (18.674 ms) : 18487, 18860
.   : milestone, 18674,
tracing (17.615 ms) : 17442, 17788
.   : milestone, 17615,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	18.365 ms [18.177 ms, 18.554 ms]	-
appsec	18.773 ms [18.585 ms, 18.96 ms]	407.518 µs (2.2%)
code_origins	17.724 ms [17.548 ms, 17.901 ms]	-640.863 µs (-3.5%)
iast	17.672 ms [17.494 ms, 17.849 ms]	-693.35 µs (-3.8%)
profiling	18.411 ms [18.226 ms, 18.596 ms]	46.22 µs (0.3%)
tracing	17.816 ms [17.635 ms, 17.997 ms]	-549.426 µs (-3.0%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	19.258 ms [19.06 ms, 19.456 ms]	-
appsec	18.539 ms [18.353 ms, 18.726 ms]	-719.098 µs (-3.7%)
code_origins	17.872 ms [17.692 ms, 18.052 ms]	-1.387 ms (-7.2%)
iast	18.817 ms [18.627 ms, 19.007 ms]	-441.565 µs (-2.3%)
profiling	18.674 ms [18.487 ms, 18.86 ms]	-584.699 µs (-3.0%)
tracing	17.615 ms [17.442 ms, 17.788 ms]	-1.644 ms (-8.5%)

Request duration reports for insecure-bank

gantt
    title insecure-bank - request duration [CI 0.99] : candidate=1.59.0-SNAPSHOT~83bde9a554, baseline=1.59.0-SNAPSHOT~02cc48359b
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.223 ms) : 1212, 1235
.   : milestone, 1223,
iast (3.203 ms) : 3161, 3244
.   : milestone, 3203,
iast_FULL (5.847 ms) : 5787, 5906
.   : milestone, 5847,
iast_GLOBAL (3.408 ms) : 3355, 3460
.   : milestone, 3408,
profiling (2.208 ms) : 2187, 2229
.   : milestone, 2208,
tracing (1.871 ms) : 1855, 1887
.   : milestone, 1871,
section candidate
no_agent (1.188 ms) : 1176, 1200
.   : milestone, 1188,
iast (3.136 ms) : 3099, 3174
.   : milestone, 3136,
iast_FULL (6.031 ms) : 5971, 6092
.   : milestone, 6031,
iast_GLOBAL (3.487 ms) : 3428, 3547
.   : milestone, 3487,
profiling (2.204 ms) : 2184, 2224
.   : milestone, 2204,
tracing (1.864 ms) : 1847, 1880
.   : milestone, 1864,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.223 ms [1.212 ms, 1.235 ms]	-
iast	3.203 ms [3.161 ms, 3.244 ms]	1.979 ms (161.8%)
iast_FULL	5.847 ms [5.787 ms, 5.906 ms]	4.624 ms (378.0%)
iast_GLOBAL	3.408 ms [3.355 ms, 3.46 ms]	2.184 ms (178.6%)
profiling	2.208 ms [2.187 ms, 2.229 ms]	984.353 µs (80.5%)
tracing	1.871 ms [1.855 ms, 1.887 ms]	647.656 µs (52.9%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.188 ms [1.176 ms, 1.2 ms]	-
iast	3.136 ms [3.099 ms, 3.174 ms]	1.948 ms (164.0%)
iast_FULL	6.031 ms [5.971 ms, 6.092 ms]	4.844 ms (407.7%)
iast_GLOBAL	3.487 ms [3.428 ms, 3.547 ms]	2.299 ms (193.6%)
profiling	2.204 ms [2.184 ms, 2.224 ms]	1.016 ms (85.5%)
tracing	1.864 ms [1.847 ms, 1.88 ms]	675.554 µs (56.9%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	sarahchen6/refactor-unsafe-utils-final-mutation
git_commit_date	1769704474	1770045266
git_commit_sha	`02cc483`	`83bde9a`
release_version	1.59.0-SNAPSHOT~02cc48359b	1.59.0-SNAPSHOT~83bde9a554

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1770047511	1770047511
ci_job_id	1393980608	1393980608
ci_pipeline_id	94105516	94105516
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-lmqexg3k 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-lmqexg3k 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 2 performance regressions! Performance is the same for 7 metrics, 3 unstable metrics.

scenario	Δ mean execution_time	candidate mean execution_time	baseline mean execution_time
scenario:dacapo:tomcat:profiling	worse [+95.776µs; +233.872µs] or [+4.583%; +11.192%]	2.254ms	2.090ms
scenario:dacapo:tomcat:tracing	worse [+55.824µs; +185.848µs] or [+2.692%; +8.963%]	2.194ms	2.073ms

Execution time for tomcat

gantt
    title tomcat - execution time [CI 0.99] : candidate=1.59.0-SNAPSHOT~83bde9a554, baseline=1.59.0-SNAPSHOT~02cc48359b
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.474 ms) : 1463, 1486
.   : milestone, 1474,
appsec (3.773 ms) : 3552, 3994
.   : milestone, 3773,
iast (2.262 ms) : 2193, 2332
.   : milestone, 2262,
iast_GLOBAL (2.297 ms) : 2227, 2366
.   : milestone, 2297,
profiling (2.09 ms) : 2034, 2145
.   : milestone, 2090,
tracing (2.073 ms) : 2020, 2127
.   : milestone, 2073,
section candidate
no_agent (1.481 ms) : 1469, 1492
.   : milestone, 1481,
appsec (3.893 ms) : 3662, 4124
.   : milestone, 3893,
iast (3.15 ms) : 2990, 3309
.   : milestone, 3150,
iast_GLOBAL (3.267 ms) : 3103, 3432
.   : milestone, 3267,
profiling (2.254 ms) : 2182, 2327
.   : milestone, 2254,
tracing (2.194 ms) : 2128, 2261
.   : milestone, 2194,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.474 ms [1.463 ms, 1.486 ms]	-
appsec	3.773 ms [3.552 ms, 3.994 ms]	2.299 ms (155.9%)
iast	2.262 ms [2.193 ms, 2.332 ms]	788.082 µs (53.5%)
iast_GLOBAL	2.297 ms [2.227 ms, 2.366 ms]	822.314 µs (55.8%)
profiling	2.09 ms [2.034 ms, 2.145 ms]	615.231 µs (41.7%)
tracing	2.073 ms [2.02 ms, 2.127 ms]	599.091 µs (40.6%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.481 ms [1.469 ms, 1.492 ms]	-
appsec	3.893 ms [3.662 ms, 4.124 ms]	2.412 ms (162.9%)
iast	3.15 ms [2.99 ms, 3.309 ms]	1.669 ms (112.7%)
iast_GLOBAL	3.267 ms [3.103 ms, 3.432 ms]	1.787 ms (120.7%)
profiling	2.254 ms [2.182 ms, 2.327 ms]	773.726 µs (52.3%)
tracing	2.194 ms [2.128 ms, 2.261 ms]	713.597 µs (48.2%)

Execution time for biojava

gantt
    title biojava - execution time [CI 0.99] : candidate=1.59.0-SNAPSHOT~83bde9a554, baseline=1.59.0-SNAPSHOT~02cc48359b
    dateFormat X
    axisFormat %s
section baseline
no_agent (15.275 s) : 15275000, 15275000
.   : milestone, 15275000,
appsec (15.001 s) : 15001000, 15001000
.   : milestone, 15001000,
iast (17.912 s) : 17912000, 17912000
.   : milestone, 17912000,
iast_GLOBAL (17.562 s) : 17562000, 17562000
.   : milestone, 17562000,
profiling (15.034 s) : 15034000, 15034000
.   : milestone, 15034000,
tracing (14.807 s) : 14807000, 14807000
.   : milestone, 14807000,
section candidate
no_agent (15.363 s) : 15363000, 15363000
.   : milestone, 15363000,
appsec (14.786 s) : 14786000, 14786000
.   : milestone, 14786000,
iast (18.34 s) : 18340000, 18340000
.   : milestone, 18340000,
iast_GLOBAL (18.047 s) : 18047000, 18047000
.   : milestone, 18047000,
profiling (14.738 s) : 14738000, 14738000
.   : milestone, 14738000,
tracing (15.122 s) : 15122000, 15122000
.   : milestone, 15122000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.275 s [15.275 s, 15.275 s]	-
appsec	15.001 s [15.001 s, 15.001 s]	-274.0 ms (-1.8%)
iast	17.912 s [17.912 s, 17.912 s]	2.637 s (17.3%)
iast_GLOBAL	17.562 s [17.562 s, 17.562 s]	2.287 s (15.0%)
profiling	15.034 s [15.034 s, 15.034 s]	-241.0 ms (-1.6%)
tracing	14.807 s [14.807 s, 14.807 s]	-468.0 ms (-3.1%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.363 s [15.363 s, 15.363 s]	-
appsec	14.786 s [14.786 s, 14.786 s]	-577.0 ms (-3.8%)
iast	18.34 s [18.34 s, 18.34 s]	2.977 s (19.4%)
iast_GLOBAL	18.047 s [18.047 s, 18.047 s]	2.684 s (17.5%)
profiling	14.738 s [14.738 s, 14.738 s]	-625.0 ms (-4.1%)
tracing	15.122 s [15.122 s, 15.122 s]	-241.0 ms (-1.6%)

sarahchen6 · 2026-02-02T15:16:05Z

dd-java-agent/build.gradle

 def generalShadowJarConfig(ShadowJar shadowJarTask) {
  shadowJarTask.with {
    mergeServiceFiles()
+    zip64 = true


Needed to address org.apache.tools.zip.Zip64RequiredException: archive contains more than 65535 entries. (example failure)

Avoid cloning final fields

4d1e4de

sarahchen6 added type: enhancement Enhancements and improvements tag: no release notes Changes to exclude from release notes labels Jan 29, 2026

Oops still need to suppressforbidden

f66b1b5

sarahchen6 added 3 commits January 30, 2026 17:02

First attempt at nonfinal cloning

4718465

Replace shallowClone with new instance of class

8e402c0

Allow zip64 for shadowjarconfig

83bde9a

sarahchen6 commented Feb 2, 2026

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Avoid final field mutation in UnsafeUtils#10476

Avoid final field mutation in UnsafeUtils#10476
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sarahchen6 commented Jan 29, 2026

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