Avoid several per request string allocations in spring-webmvc instrumenters by amarziali · Pull Request #11363 · DataDog/dd-trace-java

amarziali · 2026-05-13T12:29:13Z

What Does This Do

Handler span keys were previously computed by concatenating "dd.handler.span." + class name (+ ".continue") on every request. These strings are now cached in a ClassValue<Pair<String, String>> keyed by handler class, so the allocation happens once per handler type rather than once per request (those allocations was on the hot path on a classical spring boot server)

Motivation

Additional Notes

Contributor Checklist

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Jira ticket: [PROJ-IDENT]

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…enters

pr-commenter · 2026-05-13T14:39:07Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	andrea.marziali/spring-classvalue
git_commit_date	1778670337	1778675063
git_commit_sha	`71c5da0`	`f550e87`
release_version	1.63.0-SNAPSHOT~71c5da043c	1.63.0-SNAPSHOT~f550e8770a

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1778677585	1778677585
ci_job_id	1679582334	1679582334
ci_pipeline_id	112936802	112936802
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-gqk67hoi 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-gqk67hoi 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 62 metrics, 9 unstable metrics.

Startup time reports for petclinic

gantt
    title petclinic - global startup overhead: candidate=1.63.0-SNAPSHOT~f550e8770a, baseline=1.63.0-SNAPSHOT~71c5da043c

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.075 s) : 0, 1074648
Total [baseline] (10.923 s) : 0, 10922813
Agent [candidate] (1.082 s) : 0, 1082179
Total [candidate] (11.071 s) : 0, 11070606
section appsec
Agent [baseline] (1.271 s) : 0, 1270503
Total [baseline] (11.058 s) : 0, 11057950
Agent [candidate] (1.27 s) : 0, 1269674
Total [candidate] (11.088 s) : 0, 11088166
section iast
Agent [baseline] (1.257 s) : 0, 1256962
Total [baseline] (11.128 s) : 0, 11128215
Agent [candidate] (1.252 s) : 0, 1251725
Total [candidate] (11.122 s) : 0, 11121832
section profiling
Agent [baseline] (1.31 s) : 0, 1309870
Total [baseline] (11.105 s) : 0, 11105390
Agent [candidate] (1.316 s) : 0, 1316402
Total [candidate] (11.09 s) : 0, 11089978

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.075 s	-
Agent	appsec	1.271 s	195.854 ms (18.2%)
Agent	iast	1.257 s	182.314 ms (17.0%)
Agent	profiling	1.31 s	235.221 ms (21.9%)
Total	tracing	10.923 s	-
Total	appsec	11.058 s	135.138 ms (1.2%)
Total	iast	11.128 s	205.403 ms (1.9%)
Total	profiling	11.105 s	182.578 ms (1.7%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.082 s	-
Agent	appsec	1.27 s	187.495 ms (17.3%)
Agent	iast	1.252 s	169.546 ms (15.7%)
Agent	profiling	1.316 s	234.223 ms (21.6%)
Total	tracing	11.071 s	-
Total	appsec	11.088 s	17.56 ms (0.2%)
Total	iast	11.122 s	51.225 ms (0.5%)
Total	profiling	11.09 s	19.372 ms (0.2%)

gantt
    title petclinic - break down per module: candidate=1.63.0-SNAPSHOT~f550e8770a, baseline=1.63.0-SNAPSHOT~71c5da043c

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.254 ms) : 0, 1254
crashtracking [candidate] (1.252 ms) : 0, 1252
BytebuddyAgent [baseline] (642.039 ms) : 0, 642039
BytebuddyAgent [candidate] (645.79 ms) : 0, 645790
AgentMeter [baseline] (30.082 ms) : 0, 30082
AgentMeter [candidate] (30.384 ms) : 0, 30384
GlobalTracer [baseline] (249.084 ms) : 0, 249084
GlobalTracer [candidate] (251.865 ms) : 0, 251865
AppSec [baseline] (32.895 ms) : 0, 32895
AppSec [candidate] (33.34 ms) : 0, 33340
Debugger [baseline] (61.723 ms) : 0, 61723
Debugger [candidate] (63.252 ms) : 0, 63252
Remote Config [baseline] (604.721 µs) : 0, 605
Remote Config [candidate] (606.504 µs) : 0, 607
Telemetry [baseline] (9.309 ms) : 0, 9309
Telemetry [candidate] (9.357 ms) : 0, 9357
Flare Poller [baseline] (10.657 ms) : 0, 10657
Flare Poller [candidate] (9.231 ms) : 0, 9231
section appsec
crashtracking [baseline] (1.228 ms) : 0, 1228
crashtracking [candidate] (1.227 ms) : 0, 1227
BytebuddyAgent [baseline] (678.392 ms) : 0, 678392
BytebuddyAgent [candidate] (679.269 ms) : 0, 679269
AgentMeter [baseline] (12.104 ms) : 0, 12104
AgentMeter [candidate] (12.084 ms) : 0, 12084
GlobalTracer [baseline] (248.49 ms) : 0, 248490
GlobalTracer [candidate] (248.14 ms) : 0, 248140
IAST [baseline] (24.803 ms) : 0, 24803
IAST [candidate] (24.715 ms) : 0, 24715
AppSec [baseline] (185.606 ms) : 0, 185606
AppSec [candidate] (184.817 ms) : 0, 184817
Debugger [baseline] (65.576 ms) : 0, 65576
Debugger [candidate] (65.133 ms) : 0, 65133
Remote Config [baseline] (612.469 µs) : 0, 612
Remote Config [candidate] (604.256 µs) : 0, 604
Telemetry [baseline] (7.748 ms) : 0, 7748
Telemetry [candidate] (7.697 ms) : 0, 7697
Flare Poller [baseline] (9.143 ms) : 0, 9143
Flare Poller [candidate] (9.072 ms) : 0, 9072
section iast
crashtracking [baseline] (1.229 ms) : 0, 1229
crashtracking [candidate] (1.224 ms) : 0, 1224
BytebuddyAgent [baseline] (832.332 ms) : 0, 832332
BytebuddyAgent [candidate] (828.171 ms) : 0, 828171
AgentMeter [baseline] (11.503 ms) : 0, 11503
AgentMeter [candidate] (11.478 ms) : 0, 11478
GlobalTracer [baseline] (237.788 ms) : 0, 237788
GlobalTracer [candidate] (236.974 ms) : 0, 236974
IAST [baseline] (26.746 ms) : 0, 26746
IAST [candidate] (26.607 ms) : 0, 26607
AppSec [baseline] (33.303 ms) : 0, 33303
AppSec [candidate] (32.553 ms) : 0, 32553
Debugger [baseline] (65.2 ms) : 0, 65200
Debugger [candidate] (65.937 ms) : 0, 65937
Remote Config [baseline] (528.065 µs) : 0, 528
Remote Config [candidate] (538.252 µs) : 0, 538
Telemetry [baseline] (8.091 ms) : 0, 8091
Telemetry [candidate] (8.076 ms) : 0, 8076
Flare Poller [baseline] (3.373 ms) : 0, 3373
Flare Poller [candidate] (3.35 ms) : 0, 3350
section profiling
crashtracking [baseline] (531.015 µs) : 0, 531
crashtracking [candidate] (541.307 µs) : 0, 541
BytebuddyAgent [baseline] (687.32 ms) : 0, 687320
BytebuddyAgent [candidate] (692.069 ms) : 0, 692069
AgentMeter [baseline] (9.285 ms) : 0, 9285
AgentMeter [candidate] (9.371 ms) : 0, 9371
GlobalTracer [baseline] (209.467 ms) : 0, 209467
GlobalTracer [candidate] (209.372 ms) : 0, 209372
AppSec [baseline] (32.376 ms) : 0, 32376
AppSec [candidate] (32.738 ms) : 0, 32738
Debugger [baseline] (67.749 ms) : 0, 67749
Debugger [candidate] (68.109 ms) : 0, 68109
Remote Config [baseline] (578.217 µs) : 0, 578
Remote Config [candidate] (570.868 µs) : 0, 571
Telemetry [baseline] (8.091 ms) : 0, 8091
Telemetry [candidate] (8.054 ms) : 0, 8054
Flare Poller [baseline] (3.597 ms) : 0, 3597
Flare Poller [candidate] (3.604 ms) : 0, 3604
ProfilingAgent [baseline] (93.203 ms) : 0, 93203
ProfilingAgent [candidate] (94.163 ms) : 0, 94163
Profiling [baseline] (93.776 ms) : 0, 93776
Profiling [candidate] (94.733 ms) : 0, 94733

Startup time reports for insecure-bank

gantt
    title insecure-bank - global startup overhead: candidate=1.63.0-SNAPSHOT~f550e8770a, baseline=1.63.0-SNAPSHOT~71c5da043c

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.069 s) : 0, 1068865
Total [baseline] (8.848 s) : 0, 8847984
Agent [candidate] (1.069 s) : 0, 1068862
Total [candidate] (8.848 s) : 0, 8848486
section iast
Agent [baseline] (1.263 s) : 0, 1263396
Total [baseline] (9.586 s) : 0, 9586401
Agent [candidate] (1.25 s) : 0, 1249536
Total [candidate] (9.552 s) : 0, 9552493

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.069 s	-
Agent	iast	1.263 s	194.531 ms (18.2%)
Total	tracing	8.848 s	-
Total	iast	9.586 s	738.417 ms (8.3%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.069 s	-
Agent	iast	1.25 s	180.674 ms (16.9%)
Total	tracing	8.848 s	-
Total	iast	9.552 s	704.007 ms (8.0%)

gantt
    title insecure-bank - break down per module: candidate=1.63.0-SNAPSHOT~f550e8770a, baseline=1.63.0-SNAPSHOT~71c5da043c

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.236 ms) : 0, 1236
crashtracking [candidate] (1.222 ms) : 0, 1222
BytebuddyAgent [baseline] (640.064 ms) : 0, 640064
BytebuddyAgent [candidate] (638.565 ms) : 0, 638565
AgentMeter [baseline] (29.867 ms) : 0, 29867
AgentMeter [candidate] (29.795 ms) : 0, 29795
GlobalTracer [baseline] (247.452 ms) : 0, 247452
GlobalTracer [candidate] (248.297 ms) : 0, 248297
AppSec [baseline] (32.755 ms) : 0, 32755
AppSec [candidate] (32.745 ms) : 0, 32745
Debugger [baseline] (60.742 ms) : 0, 60742
Debugger [candidate] (62.302 ms) : 0, 62302
Remote Config [baseline] (606.963 µs) : 0, 607
Remote Config [candidate] (606.257 µs) : 0, 606
Telemetry [baseline] (9.229 ms) : 0, 9229
Telemetry [candidate] (10.011 ms) : 0, 10011
Flare Poller [baseline] (10.03 ms) : 0, 10030
Flare Poller [candidate] (8.415 ms) : 0, 8415
section iast
crashtracking [baseline] (1.239 ms) : 0, 1239
crashtracking [candidate] (1.231 ms) : 0, 1231
BytebuddyAgent [baseline] (838.028 ms) : 0, 838028
BytebuddyAgent [candidate] (827.438 ms) : 0, 827438
AgentMeter [baseline] (11.603 ms) : 0, 11603
AgentMeter [candidate] (11.405 ms) : 0, 11405
GlobalTracer [baseline] (238.97 ms) : 0, 238970
GlobalTracer [candidate] (236.578 ms) : 0, 236578
IAST [baseline] (26.987 ms) : 0, 26987
IAST [candidate] (26.676 ms) : 0, 26676
AppSec [baseline] (33.379 ms) : 0, 33379
AppSec [candidate] (32.47 ms) : 0, 32470
Debugger [baseline] (64.44 ms) : 0, 64440
Debugger [candidate] (65.075 ms) : 0, 65075
Remote Config [baseline] (543.291 µs) : 0, 543
Remote Config [candidate] (534.654 µs) : 0, 535
Telemetry [baseline] (7.982 ms) : 0, 7982
Telemetry [candidate] (7.943 ms) : 0, 7943
Flare Poller [baseline] (3.363 ms) : 0, 3363
Flare Poller [candidate] (3.392 ms) : 0, 3392

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	andrea.marziali/spring-classvalue
git_commit_date	1778670337	1778675063
git_commit_sha	`71c5da0`	`f550e87`
release_version	1.63.0-SNAPSHOT~71c5da043c	1.63.0-SNAPSHOT~f550e8770a

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1778685189	1778685189
ci_job_id	1680231878	1680231878
ci_pipeline_id	112936802	112936802
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-0-6wjq3rpc 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-0-6wjq3rpc 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 [-1429.793µs; -405.667µs] or [-7.754%; -2.200%]	unsure [-2.118ms; -0.268ms] or [-7.038%; -0.890%]	unstable [-19.440op/s; +38.753op/s] or [-7.810%; +15.569%]	17.522ms	28.906ms	258.562op/s	18.440ms	30.099ms	248.906op/s

Request duration reports for petclinic

gantt
    title petclinic - request duration [CI 0.99] : candidate=1.63.0-SNAPSHOT~f550e8770a, baseline=1.63.0-SNAPSHOT~71c5da043c
    dateFormat X
    axisFormat %s
section baseline
no_agent (18.97 ms) : 18785, 19155
.   : milestone, 18970,
appsec (18.291 ms) : 18107, 18475
.   : milestone, 18291,
code_origins (18.757 ms) : 18566, 18947
.   : milestone, 18757,
iast (17.917 ms) : 17741, 18093
.   : milestone, 17917,
profiling (18.095 ms) : 17914, 18276
.   : milestone, 18095,
tracing (18.186 ms) : 18004, 18369
.   : milestone, 18186,
section candidate
no_agent (19.172 ms) : 18979, 19365
.   : milestone, 19172,
appsec (18.46 ms) : 18278, 18642
.   : milestone, 18460,
code_origins (18.048 ms) : 17865, 18230
.   : milestone, 18048,
iast (17.867 ms) : 17689, 18045
.   : milestone, 17867,
profiling (18.437 ms) : 18253, 18620
.   : milestone, 18437,
tracing (17.929 ms) : 17752, 18106
.   : milestone, 17929,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	18.97 ms [18.785 ms, 19.155 ms]	-
appsec	18.291 ms [18.107 ms, 18.475 ms]	-679.364 µs (-3.6%)
code_origins	18.757 ms [18.566 ms, 18.947 ms]	-213.516 µs (-1.1%)
iast	17.917 ms [17.741 ms, 18.093 ms]	-1.053 ms (-5.6%)
profiling	18.095 ms [17.914 ms, 18.276 ms]	-875.321 µs (-4.6%)
tracing	18.186 ms [18.004 ms, 18.369 ms]	-783.849 µs (-4.1%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	19.172 ms [18.979 ms, 19.365 ms]	-
appsec	18.46 ms [18.278 ms, 18.642 ms]	-712.411 µs (-3.7%)
code_origins	18.048 ms [17.865 ms, 18.23 ms]	-1.124 ms (-5.9%)
iast	17.867 ms [17.689 ms, 18.045 ms]	-1.305 ms (-6.8%)
profiling	18.437 ms [18.253 ms, 18.62 ms]	-735.467 µs (-3.8%)
tracing	17.929 ms [17.752 ms, 18.106 ms]	-1.243 ms (-6.5%)

Request duration reports for insecure-bank

gantt
    title insecure-bank - request duration [CI 0.99] : candidate=1.63.0-SNAPSHOT~f550e8770a, baseline=1.63.0-SNAPSHOT~71c5da043c
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.274 ms) : 1262, 1286
.   : milestone, 1274,
iast (3.403 ms) : 3354, 3452
.   : milestone, 3403,
iast_FULL (5.908 ms) : 5849, 5968
.   : milestone, 5908,
iast_GLOBAL (3.556 ms) : 3506, 3607
.   : milestone, 3556,
profiling (2.155 ms) : 2135, 2175
.   : milestone, 2155,
tracing (1.885 ms) : 1870, 1901
.   : milestone, 1885,
section candidate
no_agent (1.274 ms) : 1262, 1287
.   : milestone, 1274,
iast (3.373 ms) : 3327, 3418
.   : milestone, 3373,
iast_FULL (5.98 ms) : 5919, 6040
.   : milestone, 5980,
iast_GLOBAL (3.527 ms) : 3474, 3580
.   : milestone, 3527,
profiling (2.243 ms) : 2222, 2265
.   : milestone, 2243,
tracing (1.881 ms) : 1866, 1896
.   : milestone, 1881,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.274 ms [1.262 ms, 1.286 ms]	-
iast	3.403 ms [3.354 ms, 3.452 ms]	2.129 ms (167.2%)
iast_FULL	5.908 ms [5.849 ms, 5.968 ms]	4.635 ms (363.9%)
iast_GLOBAL	3.556 ms [3.506 ms, 3.607 ms]	2.283 ms (179.2%)
profiling	2.155 ms [2.135 ms, 2.175 ms]	881.688 µs (69.2%)
tracing	1.885 ms [1.87 ms, 1.901 ms]	611.663 µs (48.0%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.274 ms [1.262 ms, 1.287 ms]	-
iast	3.373 ms [3.327 ms, 3.418 ms]	2.098 ms (164.6%)
iast_FULL	5.98 ms [5.919 ms, 6.04 ms]	4.705 ms (369.2%)
iast_GLOBAL	3.527 ms [3.474 ms, 3.58 ms]	2.252 ms (176.7%)
profiling	2.243 ms [2.222 ms, 2.265 ms]	968.856 µs (76.0%)
tracing	1.881 ms [1.866 ms, 1.896 ms]	606.258 µs (47.6%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	andrea.marziali/spring-classvalue
git_commit_date	1778670337	1778675063
git_commit_sha	`71c5da0`	`f550e87`
release_version	1.63.0-SNAPSHOT~71c5da043c	1.63.0-SNAPSHOT~f550e8770a

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1778677765	1778677765
ci_job_id	1679582349	1679582349
ci_pipeline_id	112936802	112936802
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-nzcfaz3b 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-nzcfaz3b 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 10 metrics, 2 unstable metrics.

Execution time for tomcat

gantt
    title tomcat - execution time [CI 0.99] : candidate=1.63.0-SNAPSHOT~f550e8770a, baseline=1.63.0-SNAPSHOT~71c5da043c
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.488 ms) : 1476, 1499
.   : milestone, 1488,
appsec (3.822 ms) : 3603, 4042
.   : milestone, 3822,
iast (2.275 ms) : 2206, 2345
.   : milestone, 2275,
iast_GLOBAL (2.322 ms) : 2252, 2392
.   : milestone, 2322,
profiling (2.525 ms) : 2360, 2690
.   : milestone, 2525,
tracing (2.074 ms) : 2020, 2127
.   : milestone, 2074,
section candidate
no_agent (1.488 ms) : 1476, 1500
.   : milestone, 1488,
appsec (3.818 ms) : 3595, 4041
.   : milestone, 3818,
iast (2.267 ms) : 2197, 2336
.   : milestone, 2267,
iast_GLOBAL (2.321 ms) : 2251, 2391
.   : milestone, 2321,
profiling (2.106 ms) : 2051, 2161
.   : milestone, 2106,
tracing (2.084 ms) : 2031, 2137
.   : milestone, 2084,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.488 ms [1.476 ms, 1.499 ms]	-
appsec	3.822 ms [3.603 ms, 4.042 ms]	2.335 ms (156.9%)
iast	2.275 ms [2.206 ms, 2.345 ms]	787.392 µs (52.9%)
iast_GLOBAL	2.322 ms [2.252 ms, 2.392 ms]	833.725 µs (56.0%)
profiling	2.525 ms [2.36 ms, 2.69 ms]	1.037 ms (69.7%)
tracing	2.074 ms [2.02 ms, 2.127 ms]	585.835 µs (39.4%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.488 ms [1.476 ms, 1.5 ms]	-
appsec	3.818 ms [3.595 ms, 4.041 ms]	2.33 ms (156.6%)
iast	2.267 ms [2.197 ms, 2.336 ms]	778.619 µs (52.3%)
iast_GLOBAL	2.321 ms [2.251 ms, 2.391 ms]	833.086 µs (56.0%)
profiling	2.106 ms [2.051 ms, 2.161 ms]	618.114 µs (41.5%)
tracing	2.084 ms [2.031 ms, 2.137 ms]	595.977 µs (40.1%)

Execution time for biojava

gantt
    title biojava - execution time [CI 0.99] : candidate=1.63.0-SNAPSHOT~f550e8770a, baseline=1.63.0-SNAPSHOT~71c5da043c
    dateFormat X
    axisFormat %s
section baseline
no_agent (15.584 s) : 15584000, 15584000
.   : milestone, 15584000,
appsec (14.695 s) : 14695000, 14695000
.   : milestone, 14695000,
iast (18.87 s) : 18870000, 18870000
.   : milestone, 18870000,
iast_GLOBAL (17.907 s) : 17907000, 17907000
.   : milestone, 17907000,
profiling (15.5 s) : 15500000, 15500000
.   : milestone, 15500000,
tracing (14.711 s) : 14711000, 14711000
.   : milestone, 14711000,
section candidate
no_agent (15.511 s) : 15511000, 15511000
.   : milestone, 15511000,
appsec (14.69 s) : 14690000, 14690000
.   : milestone, 14690000,
iast (18.648 s) : 18648000, 18648000
.   : milestone, 18648000,
iast_GLOBAL (18.089 s) : 18089000, 18089000
.   : milestone, 18089000,
profiling (14.489 s) : 14489000, 14489000
.   : milestone, 14489000,
tracing (14.661 s) : 14661000, 14661000
.   : milestone, 14661000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.584 s [15.584 s, 15.584 s]	-
appsec	14.695 s [14.695 s, 14.695 s]	-889.0 ms (-5.7%)
iast	18.87 s [18.87 s, 18.87 s]	3.286 s (21.1%)
iast_GLOBAL	17.907 s [17.907 s, 17.907 s]	2.323 s (14.9%)
profiling	15.5 s [15.5 s, 15.5 s]	-84.0 ms (-0.5%)
tracing	14.711 s [14.711 s, 14.711 s]	-873.0 ms (-5.6%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.511 s [15.511 s, 15.511 s]	-
appsec	14.69 s [14.69 s, 14.69 s]	-821.0 ms (-5.3%)
iast	18.648 s [18.648 s, 18.648 s]	3.137 s (20.2%)
iast_GLOBAL	18.089 s [18.089 s, 18.089 s]	2.578 s (16.6%)
profiling	14.489 s [14.489 s, 14.489 s]	-1.022 s (-6.6%)
tracing	14.661 s [14.661 s, 14.661 s]	-850.0 ms (-5.5%)

Avoid several per request string allocations in spring-webmvc instrum…

f550e87

…enters

amarziali requested a review from a team as a code owner May 13, 2026 12:29

amarziali added type: enhancement Enhancements and improvements tag: performance Performance related changes inst: spring Spring instrumentation labels May 13, 2026

amarziali marked this pull request as draft May 13, 2026 16:14

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Avoid several per request string allocations in spring-webmvc instrumenters#11363

Avoid several per request string allocations in spring-webmvc instrumenters#11363
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