Add support of Kotlin's SourceDebugExtension #10448

jpbempel · 2026-01-27T13:20:34Z

What Does This Do

In Kotlin some constructions remap source line beyond of the end of file (ex: stream operations, ...) which leads to incorrect line numbering in SymDB. The Kotlin classfiles contains information about this line remapping using the SourceDebugExtension (JSR-45). We are leveraging this extension to remap correctly the line numbers and send corrected lines to SymDB.
We are introducing a SourceRemapper interface with one implementation for Kotlin for now, but keeping open door for other languages like Scala.

Motivation

Additional Notes

Related to #10385

Contributor Checklist

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Jira ticket: DEBUG-4911

github-actions · 2026-01-27T13:21:14Z

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pr-commenter · 2026-01-27T13:40:18Z

Debugger benchmarks

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
ci_job_date	1769522721	1769523066
end_time	2026-01-27T14:06:40	2026-01-27T14:12:27
git_branch	master	jpbempel/add-kotlin-source-debug-ext
git_commit_sha	`5a54a81`	`aff1e5e`
start_time	2026-01-27T14:05:22	2026-01-27T14:11:07

See matching parameters

	Baseline	Candidate
ci_job_id	1379875377	1379875377
ci_pipeline_id	93034834	93034834
cpu_model	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
git_commit_date	1769522160	1769522160

Summary

Found 0 performance improvements and 0 performance regressions! Performance is the same for 9 metrics, 6 unstable metrics.

See unchanged results

scenario	Δ mean agg_http_req_duration_min	Δ mean agg_http_req_duration_p50	Δ mean agg_http_req_duration_p75	Δ mean agg_http_req_duration_p99	Δ mean throughput
scenario:noprobe	unstable [-22.673µs; +36.011µs] or [-8.292%; +13.170%]	unstable [-29.932µs; +53.413µs] or [-9.575%; +17.087%]	unstable [-41.512µs; +68.157µs] or [-12.672%; +20.806%]	unstable [-97.235µs; +138.357µs] or [-10.568%; +15.037%]	same
scenario:basic	same	same	same	unstable [-27.171µs; +145.067µs] or [-3.987%; +21.287%]	unstable [-272.351op/s; +130.103op/s] or [-10.077%; +4.814%]
scenario:loop	unsure [+6.834µs; +13.728µs] or [+0.077%; +0.155%]	unsure [+4.914µs; +15.019µs] or [+0.055%; +0.168%]	unsure [+5.238µs; +16.464µs] or [+0.058%; +0.183%]	unsure [+6.244µs; +105.971µs] or [+0.069%; +1.163%]	same

Request duration reports for reports

gantt
    title reports - request duration [CI 0.99] : candidate=None, baseline=None
    dateFormat X
    axisFormat %s
section baseline
noprobe (312.603 µs) : 278, 347
.   : milestone, 313,
basic (271.977 µs) : 265, 279
.   : milestone, 272,
loop (8.958 ms) : 8953, 8963
.   : milestone, 8958,
section candidate
noprobe (324.344 µs) : 280, 368
.   : milestone, 324,
basic (277.941 µs) : 271, 285
.   : milestone, 278,
loop (8.968 ms) : 8963, 8972
.   : milestone, 8968,

baseline results

Scenario	Request median duration [CI 0.99]
noprobe	312.603 µs [277.757 µs, 347.449 µs]
basic	271.977 µs [265.104 µs, 278.85 µs]
loop	8.958 ms [8.953 ms, 8.963 ms]

candidate results

Scenario	Request median duration [CI 0.99]
noprobe	324.344 µs [280.356 µs, 368.331 µs]
basic	277.941 µs [270.917 µs, 284.964 µs]
loop	8.968 ms [8.963 ms, 8.972 ms]

In Kotlin some constructions remap source line beyond of the end of file (ex: stream operations, ...) which leads to incorrect line numbering in SymDB. The Kotlin classfiles contains information about this line remapping using the SourceDebugExtension (JSR-45). We are leveraging this extension to remap correctly the line numbers and send corrected lines to SymDB. We are introducing a SourceRemapper interface with one implementation for Kotlin for now, but keeping open door for other languages like Scala.

pr-commenter · 2026-01-27T14:46:56Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	jpbempel/add-kotlin-source-debug-ext
git_commit_date	1769518484	1769522691
git_commit_sha	`5a54a81`	ff1e5ec635
release_version	1.59.0-SNAPSHOT~5a54a81cb0	1.59.0-SNAPSHOT~aff1e5ec635

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1769523966	1769523966
ci_job_id	1379875370	1379875370
ci_pipeline_id	93034834	93034834
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-asrtiyue 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-asrtiyue 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=1.59.0-SNAPSHOT~aff1e5ec635, baseline=1.59.0-SNAPSHOT~5a54a81cb0

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.058 s) : 0, 1058181
Total [baseline] (10.934 s) : 0, 10934142
Agent [candidate] (1.06 s) : 0, 1060345
Total [candidate] (10.936 s) : 0, 10935708
section appsec
Agent [baseline] (1.234 s) : 0, 1234361
Total [baseline] (11.014 s) : 0, 11014232
Agent [candidate] (1.228 s) : 0, 1227672
Total [candidate] (11.006 s) : 0, 11005527
section iast
Agent [baseline] (1.225 s) : 0, 1225216
Total [baseline] (11.107 s) : 0, 11106659
Agent [candidate] (1.238 s) : 0, 1238199
Total [candidate] (11.089 s) : 0, 11089061
section profiling
Agent [baseline] (1.188 s) : 0, 1188500
Total [baseline] (10.963 s) : 0, 10962658
Agent [candidate] (1.184 s) : 0, 1183658
Total [candidate] (10.803 s) : 0, 10802768

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.058 s	-
Agent	appsec	1.234 s	176.18 ms (16.6%)
Agent	iast	1.225 s	167.035 ms (15.8%)
Agent	profiling	1.188 s	130.319 ms (12.3%)
Total	tracing	10.934 s	-
Total	appsec	11.014 s	80.09 ms (0.7%)
Total	iast	11.107 s	172.516 ms (1.6%)
Total	profiling	10.963 s	28.516 ms (0.3%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.06 s	-
Agent	appsec	1.228 s	167.328 ms (15.8%)
Agent	iast	1.238 s	177.855 ms (16.8%)
Agent	profiling	1.184 s	123.313 ms (11.6%)
Total	tracing	10.936 s	-
Total	appsec	11.006 s	69.82 ms (0.6%)
Total	iast	11.089 s	153.353 ms (1.4%)
Total	profiling	10.803 s	-132.94 ms (-1.2%)

gantt
    title petclinic - break down per module: candidate=1.59.0-SNAPSHOT~aff1e5ec635, baseline=1.59.0-SNAPSHOT~5a54a81cb0

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.186 ms) : 0, 1186
crashtracking [candidate] (1.174 ms) : 0, 1174
BytebuddyAgent [baseline] (622.416 ms) : 0, 622416
BytebuddyAgent [candidate] (623.275 ms) : 0, 623275
AgentMeter [baseline] (28.741 ms) : 0, 28741
AgentMeter [candidate] (28.722 ms) : 0, 28722
GlobalTracer [baseline] (257.578 ms) : 0, 257578
GlobalTracer [candidate] (257.173 ms) : 0, 257173
AppSec [baseline] (32.978 ms) : 0, 32978
AppSec [candidate] (32.989 ms) : 0, 32989
Debugger [baseline] (61.089 ms) : 0, 61089
Debugger [candidate] (61.912 ms) : 0, 61912
Remote Config [baseline] (630.77 µs) : 0, 631
Remote Config [candidate] (622.566 µs) : 0, 623
Telemetry [baseline] (12.177 ms) : 0, 12177
Telemetry [candidate] (9.953 ms) : 0, 9953
Flare Poller [baseline] (6.126 ms) : 0, 6126
Flare Poller [candidate] (9.191 ms) : 0, 9191
section appsec
crashtracking [baseline] (1.177 ms) : 0, 1177
crashtracking [candidate] (1.167 ms) : 0, 1167
BytebuddyAgent [baseline] (653.69 ms) : 0, 653690
BytebuddyAgent [candidate] (650.0 ms) : 0, 650000
AgentMeter [baseline] (11.874 ms) : 0, 11874
AgentMeter [candidate] (11.746 ms) : 0, 11746
GlobalTracer [baseline] (257.929 ms) : 0, 257929
GlobalTracer [candidate] (256.211 ms) : 0, 256211
IAST [baseline] (25.502 ms) : 0, 25502
IAST [candidate] (25.513 ms) : 0, 25513
AppSec [baseline] (168.042 ms) : 0, 168042
AppSec [candidate] (167.137 ms) : 0, 167137
Debugger [baseline] (67.389 ms) : 0, 67389
Debugger [candidate] (67.129 ms) : 0, 67129
Remote Config [baseline] (660.009 µs) : 0, 660
Remote Config [candidate] (685.535 µs) : 0, 686
Telemetry [baseline] (9.135 ms) : 0, 9135
Telemetry [candidate] (9.288 ms) : 0, 9288
Flare Poller [baseline] (3.622 ms) : 0, 3622
Flare Poller [candidate] (3.64 ms) : 0, 3640
section iast
crashtracking [baseline] (1.204 ms) : 0, 1204
crashtracking [candidate] (1.206 ms) : 0, 1206
BytebuddyAgent [baseline] (789.825 ms) : 0, 789825
BytebuddyAgent [candidate] (798.218 ms) : 0, 798218
AgentMeter [baseline] (11.136 ms) : 0, 11136
AgentMeter [candidate] (11.412 ms) : 0, 11412
GlobalTracer [baseline] (247.878 ms) : 0, 247878
GlobalTracer [candidate] (249.844 ms) : 0, 249844
IAST [baseline] (26.973 ms) : 0, 26973
IAST [candidate] (27.097 ms) : 0, 27097
AppSec [baseline] (33.423 ms) : 0, 33423
AppSec [candidate] (31.688 ms) : 0, 31688
Debugger [baseline] (66.9 ms) : 0, 66900
Debugger [candidate] (70.548 ms) : 0, 70548
Remote Config [baseline] (559.641 µs) : 0, 560
Remote Config [candidate] (557.275 µs) : 0, 557
Telemetry [baseline] (8.509 ms) : 0, 8509
Telemetry [candidate] (8.594 ms) : 0, 8594
Flare Poller [baseline] (3.46 ms) : 0, 3460
Flare Poller [candidate] (3.446 ms) : 0, 3446
section profiling
crashtracking [baseline] (1.229 ms) : 0, 1229
crashtracking [candidate] (1.202 ms) : 0, 1202
BytebuddyAgent [baseline] (680.187 ms) : 0, 680187
BytebuddyAgent [candidate] (675.73 ms) : 0, 675730
AgentMeter [baseline] (8.65 ms) : 0, 8650
AgentMeter [candidate] (8.649 ms) : 0, 8649
GlobalTracer [baseline] (216.812 ms) : 0, 216812
GlobalTracer [candidate] (216.053 ms) : 0, 216053
AppSec [baseline] (32.099 ms) : 0, 32099
AppSec [candidate] (32.365 ms) : 0, 32365
Debugger [baseline] (67.44 ms) : 0, 67440
Debugger [candidate] (67.742 ms) : 0, 67742
Remote Config [baseline] (592.051 µs) : 0, 592
Remote Config [candidate] (589.173 µs) : 0, 589
Telemetry [baseline] (8.611 ms) : 0, 8611
Telemetry [candidate] (8.642 ms) : 0, 8642
Flare Poller [baseline] (3.706 ms) : 0, 3706
Flare Poller [candidate] (3.767 ms) : 0, 3767
ProfilingAgent [baseline] (99.139 ms) : 0, 99139
ProfilingAgent [candidate] (99.246 ms) : 0, 99246
Profiling [baseline] (99.708 ms) : 0, 99708
Profiling [candidate] (99.808 ms) : 0, 99808

Startup time reports for insecure-bank

gantt
    title insecure-bank - global startup overhead: candidate=1.59.0-SNAPSHOT~aff1e5ec635, baseline=1.59.0-SNAPSHOT~5a54a81cb0

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.057 s) : 0, 1056833
Total [baseline] (8.701 s) : 0, 8701472
Agent [candidate] (1.059 s) : 0, 1058518
Total [candidate] (8.705 s) : 0, 8704843
section iast
Agent [baseline] (1.225 s) : 0, 1225171
Total [baseline] (9.402 s) : 0, 9401982
Agent [candidate] (1.224 s) : 0, 1223652
Total [candidate] (9.384 s) : 0, 9383990

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.057 s	-
Agent	iast	1.225 s	168.337 ms (15.9%)
Total	tracing	8.701 s	-
Total	iast	9.402 s	700.51 ms (8.1%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.059 s	-
Agent	iast	1.224 s	165.134 ms (15.6%)
Total	tracing	8.705 s	-
Total	iast	9.384 s	679.147 ms (7.8%)

gantt
    title insecure-bank - break down per module: candidate=1.59.0-SNAPSHOT~aff1e5ec635, baseline=1.59.0-SNAPSHOT~5a54a81cb0

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.179 ms) : 0, 1179
crashtracking [candidate] (1.169 ms) : 0, 1169
BytebuddyAgent [baseline] (623.188 ms) : 0, 623188
BytebuddyAgent [candidate] (622.713 ms) : 0, 622713
AgentMeter [baseline] (28.837 ms) : 0, 28837
AgentMeter [candidate] (28.802 ms) : 0, 28802
GlobalTracer [baseline] (257.145 ms) : 0, 257145
GlobalTracer [candidate] (257.667 ms) : 0, 257667
AppSec [baseline] (32.849 ms) : 0, 32849
AppSec [candidate] (33.073 ms) : 0, 33073
Debugger [baseline] (62.493 ms) : 0, 62493
Debugger [candidate] (60.628 ms) : 0, 60628
Remote Config [baseline] (614.626 µs) : 0, 615
Remote Config [candidate] (646.254 µs) : 0, 646
Telemetry [baseline] (9.829 ms) : 0, 9829
Telemetry [candidate] (9.902 ms) : 0, 9902
Flare Poller [baseline] (5.226 ms) : 0, 5226
Flare Poller [candidate] (8.472 ms) : 0, 8472
section iast
crashtracking [baseline] (1.179 ms) : 0, 1179
crashtracking [candidate] (1.182 ms) : 0, 1182
BytebuddyAgent [baseline] (790.241 ms) : 0, 790241
BytebuddyAgent [candidate] (789.104 ms) : 0, 789104
AgentMeter [baseline] (11.15 ms) : 0, 11150
AgentMeter [candidate] (11.142 ms) : 0, 11142
GlobalTracer [baseline] (248.284 ms) : 0, 248284
GlobalTracer [candidate] (247.813 ms) : 0, 247813
IAST [baseline] (26.801 ms) : 0, 26801
IAST [candidate] (26.868 ms) : 0, 26868
AppSec [baseline] (32.034 ms) : 0, 32034
AppSec [candidate] (30.426 ms) : 0, 30426
Debugger [baseline] (67.535 ms) : 0, 67535
Debugger [candidate] (69.363 ms) : 0, 69363
Remote Config [baseline] (552.405 µs) : 0, 552
Remote Config [candidate] (540.481 µs) : 0, 540
Telemetry [baseline] (8.524 ms) : 0, 8524
Telemetry [candidate] (8.491 ms) : 0, 8491
Flare Poller [baseline] (3.485 ms) : 0, 3485
Flare Poller [candidate] (3.5 ms) : 0, 3500

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	jpbempel/add-kotlin-source-debug-ext
git_commit_date	1769518484	1769522714
git_commit_sha	`5a54a81`	ff1e5ec635
release_version	1.59.0-SNAPSHOT~5a54a81cb0	1.59.0-SNAPSHOT~aff1e5ec635

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1769524484	1769524484
ci_job_id	1379875371	1379875371
ci_pipeline_id	93034834	93034834
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-yx2xt4wi 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-yx2xt4wi 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 1 performance regressions! Performance is the same for 16 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:insecure-bank:iast_GLOBAL:high_load	better [-195.597µs; -83.112µs] or [-6.783%; -2.882%]	unsure [-581.712µs; -145.181µs] or [-7.138%; -1.781%]	unstable [-68.401op/s; +217.651op/s] or [-5.468%; +17.399%]	2.744ms	7.786ms	1325.531op/s	2.884ms	8.150ms	1250.906op/s
scenario:load:insecure-bank:iast_FULL:high_load	better [-419.982µs; -191.446µs] or [-7.908%; -3.605%]	better [-1173.630µs; -473.878µs] or [-9.165%; -3.701%]	unstable [-37.471op/s; +131.034op/s] or [-4.855%; +16.979%]	5.005ms	11.981ms	818.531op/s	5.311ms	12.805ms	771.750op/s
scenario:load:petclinic:no_agent:high_load	worse [+0.780ms; +2.156ms] or [+4.534%; +12.532%]	unstable [+0.435ms; +3.991ms] or [+1.485%; +13.642%]	unstable [-44.854op/s; +9.292op/s] or [-17.148%; +3.552%]	18.676ms	31.467ms	243.781op/s	17.208ms	29.255ms	261.562op/s

Request duration reports for insecure-bank

gantt
    title insecure-bank - request duration [CI 0.99] : candidate=1.59.0-SNAPSHOT~aff1e5ec635, baseline=1.59.0-SNAPSHOT~5a54a81cb0
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.189 ms) : 1178, 1201
.   : milestone, 1189,
iast (3.337 ms) : 3298, 3377
.   : milestone, 3337,
iast_FULL (5.994 ms) : 5933, 6056
.   : milestone, 5994,
iast_GLOBAL (3.668 ms) : 3607, 3729
.   : milestone, 3668,
profiling (2.101 ms) : 2082, 2120
.   : milestone, 2101,
tracing (1.821 ms) : 1805, 1838
.   : milestone, 1821,
section candidate
no_agent (1.178 ms) : 1167, 1190
.   : milestone, 1178,
iast (3.228 ms) : 3188, 3268
.   : milestone, 3228,
iast_FULL (5.65 ms) : 5595, 5706
.   : milestone, 5650,
iast_GLOBAL (3.458 ms) : 3410, 3506
.   : milestone, 3458,
profiling (1.929 ms) : 1913, 1945
.   : milestone, 1929,
tracing (1.788 ms) : 1774, 1803
.   : milestone, 1788,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.189 ms [1.178 ms, 1.201 ms]	-
iast	3.337 ms [3.298 ms, 3.377 ms]	2.148 ms (180.6%)
iast_FULL	5.994 ms [5.933 ms, 6.056 ms]	4.805 ms (404.0%)
iast_GLOBAL	3.668 ms [3.607 ms, 3.729 ms]	2.479 ms (208.4%)
profiling	2.101 ms [2.082 ms, 2.12 ms]	911.979 µs (76.7%)
tracing	1.821 ms [1.805 ms, 1.838 ms]	632.091 µs (53.1%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.178 ms [1.167 ms, 1.19 ms]	-
iast	3.228 ms [3.188 ms, 3.268 ms]	2.05 ms (174.0%)
iast_FULL	5.65 ms [5.595 ms, 5.706 ms]	4.472 ms (379.5%)
iast_GLOBAL	3.458 ms [3.41 ms, 3.506 ms]	2.28 ms (193.5%)
profiling	1.929 ms [1.913 ms, 1.945 ms]	750.577 µs (63.7%)
tracing	1.788 ms [1.774 ms, 1.803 ms]	609.916 µs (51.8%)

Request duration reports for petclinic

gantt
    title petclinic - request duration [CI 0.99] : candidate=1.59.0-SNAPSHOT~aff1e5ec635, baseline=1.59.0-SNAPSHOT~5a54a81cb0
    dateFormat X
    axisFormat %s
section baseline
no_agent (17.84 ms) : 17658, 18022
.   : milestone, 17840,
appsec (18.341 ms) : 18152, 18529
.   : milestone, 18341,
code_origins (17.98 ms) : 17798, 18161
.   : milestone, 17980,
iast (17.741 ms) : 17564, 17918
.   : milestone, 17741,
profiling (18.322 ms) : 18143, 18501
.   : milestone, 18322,
tracing (17.815 ms) : 17637, 17994
.   : milestone, 17815,
section candidate
no_agent (19.149 ms) : 18947, 19352
.   : milestone, 19149,
appsec (18.444 ms) : 18259, 18630
.   : milestone, 18444,
code_origins (17.709 ms) : 17533, 17884
.   : milestone, 17709,
iast (17.399 ms) : 17226, 17571
.   : milestone, 17399,
profiling (18.419 ms) : 18230, 18608
.   : milestone, 18419,
tracing (17.432 ms) : 17258, 17605
.   : milestone, 17432,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	17.84 ms [17.658 ms, 18.022 ms]	-
appsec	18.341 ms [18.152 ms, 18.529 ms]	500.309 µs (2.8%)
code_origins	17.98 ms [17.798 ms, 18.161 ms]	139.287 µs (0.8%)
iast	17.741 ms [17.564 ms, 17.918 ms]	-99.139 µs (-0.6%)
profiling	18.322 ms [18.143 ms, 18.501 ms]	481.789 µs (2.7%)
tracing	17.815 ms [17.637 ms, 17.994 ms]	-24.794 µs (-0.1%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	19.149 ms [18.947 ms, 19.352 ms]	-
appsec	18.444 ms [18.259 ms, 18.63 ms]	-704.784 µs (-3.7%)
code_origins	17.709 ms [17.533 ms, 17.884 ms]	-1.44 ms (-7.5%)
iast	17.399 ms [17.226 ms, 17.571 ms]	-1.751 ms (-9.1%)
profiling	18.419 ms [18.23 ms, 18.608 ms]	-730.199 µs (-3.8%)
tracing	17.432 ms [17.258 ms, 17.605 ms]	-1.718 ms (-9.0%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	jpbempel/add-kotlin-source-debug-ext
git_commit_date	1769518484	1769522619
git_commit_sha	`5a54a81`	ff1e5ec635
release_version	1.59.0-SNAPSHOT~5a54a81cb0	1.59.0-SNAPSHOT~aff1e5ec635

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1769524094	1769524094
ci_job_id	1379875372	1379875372
ci_pipeline_id	93034834	93034834
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-inuw5hps 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-inuw5hps 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 tomcat

gantt
    title tomcat - execution time [CI 0.99] : candidate=1.59.0-SNAPSHOT~aff1e5ec635, baseline=1.59.0-SNAPSHOT~5a54a81cb0
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.474 ms) : 1463, 1486
.   : milestone, 1474,
appsec (3.756 ms) : 3533, 3978
.   : milestone, 3756,
iast (2.25 ms) : 2181, 2319
.   : milestone, 2250,
iast_GLOBAL (2.301 ms) : 2232, 2371
.   : milestone, 2301,
profiling (2.075 ms) : 2020, 2130
.   : milestone, 2075,
tracing (2.08 ms) : 2026, 2134
.   : milestone, 2080,
section candidate
no_agent (1.47 ms) : 1458, 1481
.   : milestone, 1470,
appsec (3.739 ms) : 3518, 3961
.   : milestone, 3739,
iast (2.256 ms) : 2186, 2325
.   : milestone, 2256,
iast_GLOBAL (2.302 ms) : 2232, 2372
.   : milestone, 2302,
profiling (2.106 ms) : 2049, 2163
.   : milestone, 2106,
tracing (2.064 ms) : 2010, 2118
.   : milestone, 2064,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.474 ms [1.463 ms, 1.486 ms]	-
appsec	3.756 ms [3.533 ms, 3.978 ms]	2.282 ms (154.8%)
iast	2.25 ms [2.181 ms, 2.319 ms]	775.88 µs (52.6%)
iast_GLOBAL	2.301 ms [2.232 ms, 2.371 ms]	827.364 µs (56.1%)
profiling	2.075 ms [2.02 ms, 2.13 ms]	600.874 µs (40.8%)
tracing	2.08 ms [2.026 ms, 2.134 ms]	605.722 µs (41.1%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.47 ms [1.458 ms, 1.481 ms]	-
appsec	3.739 ms [3.518 ms, 3.961 ms]	2.27 ms (154.4%)
iast	2.256 ms [2.186 ms, 2.325 ms]	785.78 µs (53.5%)
iast_GLOBAL	2.302 ms [2.232 ms, 2.372 ms]	832.159 µs (56.6%)
profiling	2.106 ms [2.049 ms, 2.163 ms]	636.303 µs (43.3%)
tracing	2.064 ms [2.01 ms, 2.118 ms]	593.999 µs (40.4%)

Execution time for biojava

gantt
    title biojava - execution time [CI 0.99] : candidate=1.59.0-SNAPSHOT~aff1e5ec635, baseline=1.59.0-SNAPSHOT~5a54a81cb0
    dateFormat X
    axisFormat %s
section baseline
no_agent (14.896 s) : 14896000, 14896000
.   : milestone, 14896000,
appsec (15.004 s) : 15004000, 15004000
.   : milestone, 15004000,
iast (18.168 s) : 18168000, 18168000
.   : milestone, 18168000,
iast_GLOBAL (17.975 s) : 17975000, 17975000
.   : milestone, 17975000,
profiling (15.401 s) : 15401000, 15401000
.   : milestone, 15401000,
tracing (14.616 s) : 14616000, 14616000
.   : milestone, 14616000,
section candidate
no_agent (15.44 s) : 15440000, 15440000
.   : milestone, 15440000,
appsec (14.88 s) : 14880000, 14880000
.   : milestone, 14880000,
iast (17.75 s) : 17750000, 17750000
.   : milestone, 17750000,
iast_GLOBAL (17.834 s) : 17834000, 17834000
.   : milestone, 17834000,
profiling (14.772 s) : 14772000, 14772000
.   : milestone, 14772000,
tracing (14.877 s) : 14877000, 14877000
.   : milestone, 14877000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	14.896 s [14.896 s, 14.896 s]	-
appsec	15.004 s [15.004 s, 15.004 s]	108.0 ms (0.7%)
iast	18.168 s [18.168 s, 18.168 s]	3.272 s (22.0%)
iast_GLOBAL	17.975 s [17.975 s, 17.975 s]	3.079 s (20.7%)
profiling	15.401 s [15.401 s, 15.401 s]	505.0 ms (3.4%)
tracing	14.616 s [14.616 s, 14.616 s]	-280.0 ms (-1.9%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.44 s [15.44 s, 15.44 s]	-
appsec	14.88 s [14.88 s, 14.88 s]	-560.0 ms (-3.6%)
iast	17.75 s [17.75 s, 17.75 s]	2.31 s (15.0%)
iast_GLOBAL	17.834 s [17.834 s, 17.834 s]	2.394 s (15.5%)
profiling	14.772 s [14.772 s, 14.772 s]	-668.0 ms (-4.3%)
tracing	14.877 s [14.877 s, 14.877 s]	-563.0 ms (-3.6%)

evanchooly · 2026-01-27T14:57:02Z

...debugger/src/main/java/com/datadog/debugger/instrumentation/CapturedContextInstrumenter.java

 import com.datadog.debugger.probe.Where;
 import com.datadog.debugger.sink.Snapshot;
 import com.datadog.debugger.util.ClassFileLines;
+import com.datadog.debugger.util.JvmLanguage;


odd that this is the sole change in this file...

ojung

Nice!

jpbempel requested a review from a team as a code owner January 27, 2026 13:20

jpbempel requested review from ojung and removed request for a team January 27, 2026 13:20

jpbempel added the comp: debugger Dynamic Instrumentation label Jan 27, 2026

jpbempel added the type: enhancement Enhancements and improvements label Jan 27, 2026

jpbempel force-pushed the jpbempel/add-kotlin-source-debug-ext branch from f5b7f92 to aff1e5e Compare January 27, 2026 13:56

evanchooly approved these changes Jan 27, 2026

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Add support of Kotlin's SourceDebugExtension #10448

Add support of Kotlin's SourceDebugExtension #10448

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Add support of Kotlin's SourceDebugExtension #10448

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What Does This Do

Motivation

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Debugger benchmarks

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