Implement structural coverage cache for line level coverage

[daniel-mohedano]

What Does This Do

Motivation

Additional Notes

Contributor Checklist

• Format the title according to the contribution guidelines
• Assign the type: and (comp: or inst:) labels in addition to any other useful labels
• Avoid using close, fix, or any linking keywords when referencing an issue
  Use solves instead, and assign the PR milestone to the issue
• Update the CODEOWNERS file on source file addition, migration, or deletion
• Update public documentation with any new configuration flags or behaviors
• Once approved, use merge queue to merge the PR

Jira ticket: [PROJ-IDENT]

[datadog-datadog-us1-prod]

🎯 Code Coverage (details)
• Patch Coverage: 71.90%
• Overall Coverage: 57.09% (+0.03%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: dac9e48 | Docs | Datadog PR Page | Give us feedback!}

[cit-pr-commenter-54b7da]

Test Environment - sbt-scalatest

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	56.77	55.43	$\color{red}{\blacktriangle}$ +1.34	54.33	$\color{red}{\blacktriangle}$ +2.44	64/224
agentEvpProxy	56.65	n/a	n/a	n/a	n/a	-

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - nebula-release-plugin

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	38.09	37.15	$\color{red}{\blacktriangle}$ +0.94	36.42	$\color{red}{\blacktriangle}$ +1.67	32/109
agentless	37.46	36.42	$\color{red}{\blacktriangle}$ +1.04	36.42	$\color{red}{\blacktriangle}$ +1.04	32/109
agentlessCodeCoverage	46.02	44.48	$\color{red}{\blacktriangle}$ +1.54	44.48	$\color{red}{\blacktriangle}$ +1.54	32/109
agentlessLineCoverage	60.74	74.82	$\color{green}{\blacktriangledown}$ -14.08	74.82	$\color{green}{\blacktriangledown}$ -14.08	31/108

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - netflix-zuul

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	86.38	87.80	$\color{green}{\blacktriangledown}$ -1.42	87.80	$\color{green}{\blacktriangledown}$ -1.42	33/115
agentless	80.27	81.05	$\color{green}{\blacktriangledown}$ -0.78	81.05	$\color{green}{\blacktriangledown}$ -0.78	33/114
agentlessCodeCoverage	95.04	97.04	$\color{green}{\blacktriangledown}$ -2.00	95.12	$\color{green}{\blacktriangledown}$ -0.08	33/112
agentlessLineCoverage	110.73	111.62	$\color{green}{\blacktriangledown}$ -0.89	111.62	$\color{green}{\blacktriangledown}$ -0.89	32/111

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - pass4s

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	8.79	9.35	$\color{green}{\blacktriangledown}$ -0.56	10.33	$\color{green}{\blacktriangledown}$ -1.54	33/110
agentless	12.48	10.33	$\color{red}{\blacktriangle}$ +2.15	10.13	$\color{red}{\blacktriangle}$ +2.35	33/110
agentlessCodeCoverage	23.26	16.69	$\color{red}{\blacktriangle}$ +6.57	17.38	$\color{red}{\blacktriangle}$ +5.88	32/108

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - reactive-streams-jvm

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	23.07	22.09	$\color{red}{\blacktriangle}$ +0.98	21.65	$\color{red}{\blacktriangle}$ +1.42	33/116
agentless	20.17	18.82	$\color{red}{\blacktriangle}$ +1.35	18.82	$\color{red}{\blacktriangle}$ +1.35	32/114
agentlessCodeCoverage	20.79	20.39	$\color{red}{\blacktriangle}$ +0.40	19.99	$\color{red}{\blacktriangle}$ +0.80	32/113
agentlessLineCoverage	26.94	30.42	$\color{green}{\blacktriangledown}$ -3.48	29.82	$\color{green}{\blacktriangledown}$ -2.88	31/112

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - heliboard

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	8.47	9.54	$\color{green}{\blacktriangledown}$ -1.07	9.54	$\color{green}{\blacktriangledown}$ -1.07	30/30

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - sonar-kotlin

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	14.13	12.87	$\color{red}{\blacktriangle}$ +1.26	13.13	$\color{red}{\blacktriangle}$ +1.00	30/110
agentless	12.32	12.12	$\color{red}{\blacktriangle}$ +0.20	12.12	$\color{red}{\blacktriangle}$ +0.20	30/109
agentlessCodeCoverage	16.06	15.11	$\color{red}{\blacktriangle}$ +0.95	15.11	$\color{red}{\blacktriangle}$ +0.95	30/109
agentlessLineCoverage	17.46	18.82	$\color{green}{\blacktriangledown}$ -1.36	18.82	$\color{green}{\blacktriangledown}$ -1.36	29/109

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[dd-octo-sts]

🟢 Java Benchmark SLOs — All performance SLOs passed

Suite	Status
Startup	🟢 pass

SLO thresholds are defined here based on automatically generated metrics. A warning is raised when results are within 5% of the threshold.

PR vs. master results

Scenario	Candidate	master	Δ (95% CI of mean)
startup:insecure-bank:iast:Agent	13.96 s	13.97 s	[-0.9%; +0.8%] (no difference)
startup:insecure-bank:tracing:Agent	12.95 s	13.02 s	[-1.5%; +0.3%] (no difference)
startup:petclinic:appsec:Agent	16.91 s	16.20 s	[+0.2%; +8.5%] (maybe worse)
startup:petclinic:iast:Agent	16.92 s	16.52 s	[-2.0%; +6.8%] (no difference)
startup:petclinic:profiling:Agent	16.61 s	16.85 s	[-2.5%; -0.3%] (maybe better)
startup:petclinic:sca:Agent	16.96 s	16.72 s	[+0.4%; +2.4%] (maybe worse)
startup:petclinic:tracing:Agent	16.10 s	16.22 s	[-1.6%; +0.1%] (no difference)

Commit: dac9e48f · CI Pipeline · Benchmarking Platform UI

---

Load and DaCapo benchmarks can be triggered manually in the GitLab pipeline. Results will appear in the Benchmarking Platform UI after completion.

[cit-pr-commenter-54b7da]

Test Environment - jolokia

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	94.81	95.12	$\color{green}{\blacktriangledown}$ -0.31	93.23	$\color{red}{\blacktriangle}$ +1.58	36/119
agentless	88.72	89.58	$\color{green}{\blacktriangledown}$ -0.86	89.58	$\color{green}{\blacktriangledown}$ -0.86	33/115
agentlessCodeCoverage	98.31	99.00	$\color{green}{\blacktriangledown}$ -0.69	99.00	$\color{green}{\blacktriangledown}$ -0.69	35/114
agentlessLineCoverage	99.39	99.00	$\color{red}{\blacktriangle}$ +0.39	99.00	$\color{red}{\blacktriangle}$ +0.39	32/112

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - okhttp

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	18.41	19.20	$\color{green}{\blacktriangledown}$ -0.79	19.20	$\color{green}{\blacktriangledown}$ -0.79	36/122
agentless	19.57	19.59	$\color{green}{\blacktriangledown}$ -0.02	19.20	$\color{red}{\blacktriangle}$ +0.37	34/119
agentlessCodeCoverage	23.66	22.99	$\color{red}{\blacktriangle}$ +0.67	22.09	$\color{red}{\blacktriangle}$ +1.57	34/117
agentlessLineCoverage	35.06	44.48	$\color{green}{\blacktriangledown}$ -9.42	44.48	$\color{green}{\blacktriangledown}$ -9.42	33/122

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - spring_boot

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	16.17	16.36	$\color{green}{\blacktriangledown}$ -0.19	16.04	$\color{red}{\blacktriangle}$ +0.13	32/108
agentless	9.72	9.73	$\color{green}{\blacktriangledown}$ -0.01	9.73	$\color{green}{\blacktriangledown}$ -0.01	32/109
agentlessCodeCoverage	14.11	13.67	$\color{red}{\blacktriangle}$ +0.44	13.13	$\color{red}{\blacktriangle}$ +0.98	32/107
agentlessLineCoverage	16.66	32.95	$\color{green}{\blacktriangledown}$ -16.29	32.30	$\color{green}{\blacktriangledown}$ -15.64	32/108

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.

[cit-pr-commenter-54b7da]

Test Environment - sonar-java

Job Status: 🟢 success

Scenario	This PR (%)	7d median	Δ 7d	30d median	Δ 30d	runs (7d/30d)
agent	-13.05	13.40	$\color{green}{\blacktriangledown}$ -26.45	15.72	$\color{green}{\blacktriangledown}$ -28.77	30/114
agentless	12.62	12.62	$\color{gray}{\bullet}$ 0.00	17.38	$\color{green}{\blacktriangledown}$ -4.76	30/113
agentlessCodeCoverage	47.59	79.45	$\color{green}{\blacktriangledown}$ -31.86	86.07	$\color{green}{\blacktriangledown}$ -38.48	30/113
agentlessLineCoverage	50.24	125.85	$\color{green}{\blacktriangledown}$ -75.61	141.90	$\color{green}{\blacktriangledown}$ -91.66	30/113

Baseline: median of @test.tracer_overhead on main (gitlab) over the last 7/30 days, per OSS project & scenario. Δ = this PR − baseline median; red ▲ = more overhead, green ▽ = less overhead than baseline.