Use `ClassFile` parser when pre-loading class hierarchies #9969

mcculls · 2025-11-14T13:11:08Z

Motivation

We already parse bytecode just before classes are defined so we can pre-load super-classes and interfaces before the type using them (this ordering is not necessarily guaranteed by the JVM.) This pre-loading helps get the most out of type hierarchy optimizations such as memoization.

This PR switches this parsing to use our optimized class header parser instead of ASM.

The difference is more noticeable in large applications that load lots of classes.

For example, time taken to parse the classes in spring-web - lower number is better:

ClassFileBenchmark.testAsmHeader     avgt    5   974.185 ± 28.863  us/op
ClassFileBenchmark.testClassHeader   avgt    5   747.816 ± 14.464  us/op

Contributor Checklist

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Jira ticket: [PROJ-IDENT]

datadog-datadog-prod-us1 · 2025-11-14T13:28:08Z

🎯 Code Coverage
• Patch Coverage: 0.00%
• Total Coverage: 63.09% (+3.43%)

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🔗 Commit SHA: 306a2f5 | Docs | Datadog PR Page | Was this helpful? Give us feedback!}

pr-commenter · 2025-11-14T13:58:58Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mcculls/faster-predefine-parsing
git_commit_date	1763125583	1763125815
git_commit_sha	`c93f2e7`	`306a2f5`
release_version	1.56.0-SNAPSHOT~c93f2e7d2f	1.56.0-SNAPSHOT~306a2f5806

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1763127715	1763127715
ci_job_id	1235209123	1235209123
ci_pipeline_id	82409829	82409829
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-pj78uw99 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-pj78uw99 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 57 metrics, 8 unstable metrics.

Startup time reports for petclinic

gantt
    title petclinic - global startup overhead: candidate=1.56.0-SNAPSHOT~306a2f5806, baseline=1.56.0-SNAPSHOT~c93f2e7d2f

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.098 s) : 0, 1098073
Total [baseline] (10.752 s) : 0, 10752238
Agent [candidate] (1.097 s) : 0, 1097271
Total [candidate] (10.789 s) : 0, 10788584
section appsec
Agent [baseline] (1.281 s) : 0, 1280841
Total [baseline] (11.079 s) : 0, 11079122
Agent [candidate] (1.279 s) : 0, 1278547
Total [candidate] (11.04 s) : 0, 11039534
section iast
Agent [baseline] (1.235 s) : 0, 1235412
Total [baseline] (11.3 s) : 0, 11299563
Agent [candidate] (1.24 s) : 0, 1240429
Total [candidate] (11.335 s) : 0, 11334687
section profiling
Agent [baseline] (1.236 s) : 0, 1235961
Total [baseline] (11.087 s) : 0, 11087421
Agent [candidate] (1.231 s) : 0, 1230886
Total [candidate] (11.111 s) : 0, 11111063

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.098 s	-
Agent	appsec	1.281 s	182.768 ms (16.6%)
Agent	iast	1.235 s	137.339 ms (12.5%)
Agent	profiling	1.236 s	137.888 ms (12.6%)
Total	tracing	10.752 s	-
Total	appsec	11.079 s	326.884 ms (3.0%)
Total	iast	11.3 s	547.325 ms (5.1%)
Total	profiling	11.087 s	335.183 ms (3.1%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.097 s	-
Agent	appsec	1.279 s	181.276 ms (16.5%)
Agent	iast	1.24 s	143.157 ms (13.0%)
Agent	profiling	1.231 s	133.614 ms (12.2%)
Total	tracing	10.789 s	-
Total	appsec	11.04 s	250.95 ms (2.3%)
Total	iast	11.335 s	546.103 ms (5.1%)
Total	profiling	11.111 s	322.479 ms (3.0%)

gantt
    title petclinic - break down per module: candidate=1.56.0-SNAPSHOT~306a2f5806, baseline=1.56.0-SNAPSHOT~c93f2e7d2f

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.461 ms) : 0, 1461
crashtracking [candidate] (1.46 ms) : 0, 1460
BytebuddyAgent [baseline] (704.562 ms) : 0, 704562
BytebuddyAgent [candidate] (704.423 ms) : 0, 704423
GlobalTracer [baseline] (248.078 ms) : 0, 248078
GlobalTracer [candidate] (248.077 ms) : 0, 248077
AppSec [baseline] (32.298 ms) : 0, 32298
AppSec [candidate] (32.103 ms) : 0, 32103
Debugger [baseline] (64.265 ms) : 0, 64265
Debugger [candidate] (63.836 ms) : 0, 63836
Remote Config [baseline] (630.181 µs) : 0, 630
Remote Config [candidate] (623.601 µs) : 0, 624
Telemetry [baseline] (8.22 ms) : 0, 8220
Telemetry [candidate] (8.201 ms) : 0, 8201
Flare Poller [baseline] (3.66 ms) : 0, 3660
Flare Poller [candidate] (3.729 ms) : 0, 3729
section appsec
crashtracking [baseline] (1.466 ms) : 0, 1466
crashtracking [candidate] (1.468 ms) : 0, 1468
BytebuddyAgent [baseline] (730.447 ms) : 0, 730447
BytebuddyAgent [candidate] (729.892 ms) : 0, 729892
GlobalTracer [baseline] (239.911 ms) : 0, 239911
GlobalTracer [candidate] (240.104 ms) : 0, 240104
AppSec [baseline] (174.829 ms) : 0, 174829
AppSec [candidate] (173.769 ms) : 0, 173769
Debugger [baseline] (61.462 ms) : 0, 61462
Debugger [candidate] (60.788 ms) : 0, 60788
Remote Config [baseline] (708.072 µs) : 0, 708
Remote Config [candidate] (673.879 µs) : 0, 674
Telemetry [baseline] (8.25 ms) : 0, 8250
Telemetry [candidate] (8.294 ms) : 0, 8294
Flare Poller [baseline] (3.813 ms) : 0, 3813
Flare Poller [candidate] (3.885 ms) : 0, 3885
IAST [baseline] (24.821 ms) : 0, 24821
IAST [candidate] (24.696 ms) : 0, 24696
section iast
crashtracking [baseline] (1.453 ms) : 0, 1453
crashtracking [candidate] (1.465 ms) : 0, 1465
BytebuddyAgent [baseline] (827.045 ms) : 0, 827045
BytebuddyAgent [candidate] (829.792 ms) : 0, 829792
GlobalTracer [baseline] (237.544 ms) : 0, 237544
GlobalTracer [candidate] (238.617 ms) : 0, 238617
AppSec [baseline] (33.292 ms) : 0, 33292
AppSec [candidate] (32.86 ms) : 0, 32860
Debugger [baseline] (61.161 ms) : 0, 61161
Debugger [candidate] (61.639 ms) : 0, 61639
Remote Config [baseline] (551.011 µs) : 0, 551
Remote Config [candidate] (544.714 µs) : 0, 545
Telemetry [baseline] (7.731 ms) : 0, 7731
Telemetry [candidate] (7.825 ms) : 0, 7825
Flare Poller [baseline] (3.488 ms) : 0, 3488
Flare Poller [candidate] (3.493 ms) : 0, 3493
IAST [baseline] (28.25 ms) : 0, 28250
IAST [candidate] (29.22 ms) : 0, 29220
section profiling
crashtracking [baseline] (1.459 ms) : 0, 1459
crashtracking [candidate] (1.438 ms) : 0, 1438
BytebuddyAgent [baseline] (734.62 ms) : 0, 734620
BytebuddyAgent [candidate] (731.445 ms) : 0, 731445
GlobalTracer [baseline] (222.973 ms) : 0, 222973
GlobalTracer [candidate] (222.315 ms) : 0, 222315
AppSec [baseline] (33.1 ms) : 0, 33100
AppSec [candidate] (32.304 ms) : 0, 32304
Debugger [baseline] (62.832 ms) : 0, 62832
Debugger [candidate] (63.558 ms) : 0, 63558
Remote Config [baseline] (648.835 µs) : 0, 649
Remote Config [candidate] (667.915 µs) : 0, 668
Telemetry [baseline] (8.015 ms) : 0, 8015
Telemetry [candidate] (8.047 ms) : 0, 8047
Flare Poller [baseline] (3.756 ms) : 0, 3756
Flare Poller [candidate] (3.71 ms) : 0, 3710
ProfilingAgent [baseline] (98.558 ms) : 0, 98558
ProfilingAgent [candidate] (97.706 ms) : 0, 97706
Profiling [baseline] (99.152 ms) : 0, 99152
Profiling [candidate] (98.291 ms) : 0, 98291

Startup time reports for insecure-bank

gantt
    title insecure-bank - global startup overhead: candidate=1.56.0-SNAPSHOT~306a2f5806, baseline=1.56.0-SNAPSHOT~c93f2e7d2f

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.099 s) : 0, 1099202
Total [baseline] (8.859 s) : 0, 8859042
Agent [candidate] (1.099 s) : 0, 1098809
Total [candidate] (8.813 s) : 0, 8812723
section iast
Agent [baseline] (1.244 s) : 0, 1244327
Total [baseline] (9.552 s) : 0, 9551792
Agent [candidate] (1.237 s) : 0, 1237458
Total [candidate] (9.525 s) : 0, 9524668

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.099 s	-
Agent	iast	1.244 s	145.125 ms (13.2%)
Total	tracing	8.859 s	-
Total	iast	9.552 s	692.75 ms (7.8%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.099 s	-
Agent	iast	1.237 s	138.649 ms (12.6%)
Total	tracing	8.813 s	-
Total	iast	9.525 s	711.945 ms (8.1%)

gantt
    title insecure-bank - break down per module: candidate=1.56.0-SNAPSHOT~306a2f5806, baseline=1.56.0-SNAPSHOT~c93f2e7d2f

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.457 ms) : 0, 1457
crashtracking [candidate] (1.46 ms) : 0, 1460
BytebuddyAgent [baseline] (706.441 ms) : 0, 706441
BytebuddyAgent [candidate] (705.728 ms) : 0, 705728
GlobalTracer [baseline] (248.476 ms) : 0, 248476
GlobalTracer [candidate] (248.387 ms) : 0, 248387
AppSec [baseline] (32.295 ms) : 0, 32295
AppSec [candidate] (32.334 ms) : 0, 32334
Debugger [baseline] (63.273 ms) : 0, 63273
Debugger [candidate] (63.513 ms) : 0, 63513
Remote Config [baseline] (632.139 µs) : 0, 632
Remote Config [candidate] (648.228 µs) : 0, 648
Telemetry [baseline] (8.067 ms) : 0, 8067
Telemetry [candidate] (8.163 ms) : 0, 8163
Flare Poller [baseline] (3.671 ms) : 0, 3671
Flare Poller [candidate] (3.692 ms) : 0, 3692
section iast
crashtracking [baseline] (1.482 ms) : 0, 1482
crashtracking [candidate] (1.457 ms) : 0, 1457
BytebuddyAgent [baseline] (835.264 ms) : 0, 835264
BytebuddyAgent [candidate] (829.912 ms) : 0, 829912
GlobalTracer [baseline] (238.36 ms) : 0, 238360
GlobalTracer [candidate] (237.596 ms) : 0, 237596
AppSec [baseline] (33.271 ms) : 0, 33271
AppSec [candidate] (33.995 ms) : 0, 33995
Debugger [baseline] (60.521 ms) : 0, 60521
Debugger [candidate] (60.33 ms) : 0, 60330
Remote Config [baseline] (552.099 µs) : 0, 552
Remote Config [candidate] (552.464 µs) : 0, 552
Telemetry [baseline] (7.793 ms) : 0, 7793
Telemetry [candidate] (7.723 ms) : 0, 7723
Flare Poller [baseline] (3.539 ms) : 0, 3539
Flare Poller [candidate] (3.48 ms) : 0, 3480
IAST [baseline] (28.467 ms) : 0, 28467
IAST [candidate] (27.335 ms) : 0, 27335

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mcculls/faster-predefine-parsing
git_commit_date	1763125583	1763125815
git_commit_sha	`c93f2e7`	`306a2f5`
release_version	1.56.0-SNAPSHOT~c93f2e7d2f	1.56.0-SNAPSHOT~306a2f5806

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1763128201	1763128201
ci_job_id	1235209124	1235209124
ci_pipeline_id	82409829	82409829
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-j0ywgo1b 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-j0ywgo1b 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 19 metrics, 16 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:appsec:high_load	better [-1.738ms; -0.768ms] or [-9.011%; -3.982%]	unsure [-1.934ms; -0.361ms] or [-6.215%; -1.161%]	unstable [-11.546op/s; +38.109op/s] or [-4.839%; +15.972%]	18.032ms	29.961ms	251.875op/s	19.285ms	31.108ms	238.594op/s

Request duration reports for petclinic

gantt
    title petclinic - request duration [CI 0.99] : candidate=1.56.0-SNAPSHOT~306a2f5806, baseline=1.56.0-SNAPSHOT~c93f2e7d2f
    dateFormat X
    axisFormat %s
section baseline
no_agent (19.008 ms) : 18813, 19202
.   : milestone, 19008,
appsec (19.564 ms) : 19361, 19767
.   : milestone, 19564,
code_origins (17.922 ms) : 17740, 18104
.   : milestone, 17922,
iast (17.798 ms) : 17620, 17976
.   : milestone, 17798,
profiling (18.831 ms) : 18647, 19016
.   : milestone, 18831,
tracing (17.463 ms) : 17288, 17637
.   : milestone, 17463,
section candidate
no_agent (18.012 ms) : 17827, 18198
.   : milestone, 18012,
appsec (18.53 ms) : 18341, 18719
.   : milestone, 18530,
code_origins (17.523 ms) : 17348, 17698
.   : milestone, 17523,
iast (17.602 ms) : 17426, 17778
.   : milestone, 17602,
profiling (18.477 ms) : 18292, 18662
.   : milestone, 18477,
tracing (17.462 ms) : 17290, 17634
.   : milestone, 17462,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	19.008 ms [18.813 ms, 19.202 ms]	-
appsec	19.564 ms [19.361 ms, 19.767 ms]	556.34 µs (2.9%)
code_origins	17.922 ms [17.74 ms, 18.104 ms]	-1.086 ms (-5.7%)
iast	17.798 ms [17.62 ms, 17.976 ms]	-1.21 ms (-6.4%)
profiling	18.831 ms [18.647 ms, 19.016 ms]	-176.379 µs (-0.9%)
tracing	17.463 ms [17.288 ms, 17.637 ms]	-1.545 ms (-8.1%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	18.012 ms [17.827 ms, 18.198 ms]	-
appsec	18.53 ms [18.341 ms, 18.719 ms]	517.547 µs (2.9%)
code_origins	17.523 ms [17.348 ms, 17.698 ms]	-489.141 µs (-2.7%)
iast	17.602 ms [17.426 ms, 17.778 ms]	-409.972 µs (-2.3%)
profiling	18.477 ms [18.292 ms, 18.662 ms]	464.71 µs (2.6%)
tracing	17.462 ms [17.29 ms, 17.634 ms]	-550.312 µs (-3.1%)

Request duration reports for insecure-bank

gantt
    title insecure-bank - request duration [CI 0.99] : candidate=1.56.0-SNAPSHOT~306a2f5806, baseline=1.56.0-SNAPSHOT~c93f2e7d2f
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.182 ms) : 1171, 1194
.   : milestone, 1182,
iast (3.222 ms) : 3176, 3268
.   : milestone, 3222,
iast_FULL (5.779 ms) : 5696, 5862
.   : milestone, 5779,
iast_GLOBAL (3.667 ms) : 3581, 3753
.   : milestone, 3667,
profiling (1.986 ms) : 1969, 2003
.   : milestone, 1986,
tracing (1.786 ms) : 1771, 1800
.   : milestone, 1786,
section candidate
no_agent (1.189 ms) : 1178, 1201
.   : milestone, 1189,
iast (3.27 ms) : 3211, 3329
.   : milestone, 3270,
iast_FULL (5.712 ms) : 5655, 5769
.   : milestone, 5712,
iast_GLOBAL (3.678 ms) : 3616, 3740
.   : milestone, 3678,
profiling (2.098 ms) : 2079, 2116
.   : milestone, 2098,
tracing (1.812 ms) : 1797, 1828
.   : milestone, 1812,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.182 ms [1.171 ms, 1.194 ms]	-
iast	3.222 ms [3.176 ms, 3.268 ms]	2.04 ms (172.5%)
iast_FULL	5.779 ms [5.696 ms, 5.862 ms]	4.597 ms (388.7%)
iast_GLOBAL	3.667 ms [3.581 ms, 3.753 ms]	2.484 ms (210.1%)
profiling	1.986 ms [1.969 ms, 2.003 ms]	803.338 µs (67.9%)
tracing	1.786 ms [1.771 ms, 1.8 ms]	603.197 µs (51.0%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.189 ms [1.178 ms, 1.201 ms]	-
iast	3.27 ms [3.211 ms, 3.329 ms]	2.081 ms (175.0%)
iast_FULL	5.712 ms [5.655 ms, 5.769 ms]	4.523 ms (380.3%)
iast_GLOBAL	3.678 ms [3.616 ms, 3.74 ms]	2.489 ms (209.2%)
profiling	2.098 ms [2.079 ms, 2.116 ms]	908.187 µs (76.4%)
tracing	1.812 ms [1.797 ms, 1.828 ms]	623.016 µs (52.4%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mcculls/faster-predefine-parsing
git_commit_date	1763125583	1763125815
git_commit_sha	`c93f2e7`	`306a2f5`
release_version	1.56.0-SNAPSHOT~c93f2e7d2f	1.56.0-SNAPSHOT~306a2f5806

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1763127886	1763127886
ci_job_id	1235209125	1235209125
ci_pipeline_id	82409829	82409829
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-q7urxbb2 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-q7urxbb2 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=1.56.0-SNAPSHOT~306a2f5806, baseline=1.56.0-SNAPSHOT~c93f2e7d2f
    dateFormat X
    axisFormat %s
section baseline
no_agent (15.015 s) : 15015000, 15015000
.   : milestone, 15015000,
appsec (14.643 s) : 14643000, 14643000
.   : milestone, 14643000,
iast (18.123 s) : 18123000, 18123000
.   : milestone, 18123000,
iast_GLOBAL (17.816 s) : 17816000, 17816000
.   : milestone, 17816000,
profiling (14.773 s) : 14773000, 14773000
.   : milestone, 14773000,
tracing (14.958 s) : 14958000, 14958000
.   : milestone, 14958000,
section candidate
no_agent (15.625 s) : 15625000, 15625000
.   : milestone, 15625000,
appsec (14.866 s) : 14866000, 14866000
.   : milestone, 14866000,
iast (18.091 s) : 18091000, 18091000
.   : milestone, 18091000,
iast_GLOBAL (17.888 s) : 17888000, 17888000
.   : milestone, 17888000,
profiling (15.032 s) : 15032000, 15032000
.   : milestone, 15032000,
tracing (14.994 s) : 14994000, 14994000
.   : milestone, 14994000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.015 s [15.015 s, 15.015 s]	-
appsec	14.643 s [14.643 s, 14.643 s]	-372.0 ms (-2.5%)
iast	18.123 s [18.123 s, 18.123 s]	3.108 s (20.7%)
iast_GLOBAL	17.816 s [17.816 s, 17.816 s]	2.801 s (18.7%)
profiling	14.773 s [14.773 s, 14.773 s]	-242.0 ms (-1.6%)
tracing	14.958 s [14.958 s, 14.958 s]	-57.0 ms (-0.4%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.625 s [15.625 s, 15.625 s]	-
appsec	14.866 s [14.866 s, 14.866 s]	-759.0 ms (-4.9%)
iast	18.091 s [18.091 s, 18.091 s]	2.466 s (15.8%)
iast_GLOBAL	17.888 s [17.888 s, 17.888 s]	2.263 s (14.5%)
profiling	15.032 s [15.032 s, 15.032 s]	-593.0 ms (-3.8%)
tracing	14.994 s [14.994 s, 14.994 s]	-631.0 ms (-4.0%)

Execution time for tomcat

gantt
    title tomcat - execution time [CI 0.99] : candidate=1.56.0-SNAPSHOT~306a2f5806, baseline=1.56.0-SNAPSHOT~c93f2e7d2f
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.479 ms) : 1468, 1491
.   : milestone, 1479,
appsec (3.728 ms) : 3507, 3949
.   : milestone, 3728,
iast (2.22 ms) : 2156, 2284
.   : milestone, 2220,
iast_GLOBAL (2.261 ms) : 2197, 2326
.   : milestone, 2261,
profiling (2.087 ms) : 2033, 2141
.   : milestone, 2087,
tracing (2.021 ms) : 1972, 2071
.   : milestone, 2021,
section candidate
no_agent (1.474 ms) : 1462, 1485
.   : milestone, 1474,
appsec (3.71 ms) : 3489, 3931
.   : milestone, 3710,
iast (2.213 ms) : 2149, 2277
.   : milestone, 2213,
iast_GLOBAL (2.262 ms) : 2197, 2326
.   : milestone, 2262,
profiling (2.068 ms) : 2016, 2121
.   : milestone, 2068,
tracing (2.035 ms) : 1985, 2085
.   : milestone, 2035,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.479 ms [1.468 ms, 1.491 ms]	-
appsec	3.728 ms [3.507 ms, 3.949 ms]	2.248 ms (152.0%)
iast	2.22 ms [2.156 ms, 2.284 ms]	740.704 µs (50.1%)
iast_GLOBAL	2.261 ms [2.197 ms, 2.326 ms]	781.939 µs (52.9%)
profiling	2.087 ms [2.033 ms, 2.141 ms]	607.343 µs (41.1%)
tracing	2.021 ms [1.972 ms, 2.071 ms]	541.976 µs (36.6%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.474 ms [1.462 ms, 1.485 ms]	-
appsec	3.71 ms [3.489 ms, 3.931 ms]	2.236 ms (151.8%)
iast	2.213 ms [2.149 ms, 2.277 ms]	739.727 µs (50.2%)
iast_GLOBAL	2.262 ms [2.197 ms, 2.326 ms]	788.27 µs (53.5%)
profiling	2.068 ms [2.016 ms, 2.121 ms]	594.659 µs (40.4%)
tracing	2.035 ms [1.985 ms, 2.085 ms]	561.019 µs (38.1%)

Use ClassFile parser when pre-loading class hierarchies

306a2f5

mcculls added type: enhancement Enhancements and improvements comp: core Tracer core tag: performance Performance related changes labels Nov 14, 2025

mcculls marked this pull request as ready for review November 14, 2025 14:35

mcculls requested a review from a team as a code owner November 14, 2025 14:35

mcculls requested a review from manuel-alvarez-alvarez November 14, 2025 14:35

mcculls changed the title ~~Use ClassFile parser when pre-loading class hierarchies~~ Use ClassFile parser when pre-loading class hierarchies Nov 15, 2025

bric3 approved these changes Nov 17, 2025

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mcculls merged commit 532ee38 into master Nov 18, 2025
563 checks passed

mcculls deleted the mcculls/faster-predefine-parsing branch November 18, 2025 10:45

github-actions bot added this to the 1.56.0 milestone Nov 18, 2025

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Use `ClassFile` parser when pre-loading class hierarchies #9969

Use `ClassFile` parser when pre-loading class hierarchies #9969

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Use `ClassFile` parser when pre-loading class hierarchies #9969

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