test(undici): force proxy tunnel in CONNECT regression test by BridgeAR · Pull Request #9271 · DataDog/dd-trace-js

BridgeAR · 2026-07-08T20:46:55Z

undici 8.7.0 (nodejs/undici#5116) changed the default so a plain HTTP request through an HTTP proxy forwards an absolute-form request instead of tunneling via CONNECT. The ProxyAgent CONNECT-span regression test then sees no CONNECT request at all and fails asserting a finished CONNECT span. Passing proxyTunnel: true restores the tunnel; the option is a no-op on undici < 6.22.0, where CONNECT was always used.

Refs: nodejs/undici#5116

undici 8.7.0 (nodejs/undici#5116) changed the default so a plain HTTP request through an HTTP proxy forwards an absolute-form request instead of tunneling via CONNECT. The ProxyAgent CONNECT-span regression test then sees no CONNECT request at all and fails asserting a finished CONNECT span. Passing proxyTunnel: true restores the tunnel; the option is a no-op on undici < 6.22.0, where CONNECT was always used. Refs: nodejs/undici#5116

dd-octo-sts · 2026-07-08T20:47:53Z

Overall package size

Self size: 6.68 MB
Deduped: 7.34 MB
No deduping: 7.34 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | import-in-the-middle | 3.3.1 | 122.62 kB | 437.94 kB | | opentracing | 0.14.7 | 194.81 kB | 194.81 kB | | dc-polyfill | 0.1.11 | 25.74 kB | 25.74 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

datadog-prod-us1-3 · 2026-07-08T20:50:16Z

Tests

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 96.51% (-0.00%)

_{This comment will be updated automatically if new data arrives.

🔗 Commit SHA: d605114 | Docs | Datadog PR Page | Give us feedback!}

pr-commenter · 2026-07-08T20:57:09Z

Benchmarks

Benchmark execution time: 2026-07-08 20:57:05

Comparing candidate commit d605114 in PR branch BridgeAR/2026-07-08-undici-proxy-tunnel-connect-test with baseline commit f8d1b6f in branch master.

📊 Benchmarking dashboard

Found 0 performance improvements and 0 performance regressions! Performance is the same for 2310 metrics, 48 unstable metrics.

Explanation

This is an A/B test comparing a candidate commit's performance against that of a baseline commit. Performance changes are noted in the tables below as:

🟩 = significantly better candidate vs. baseline
🟥 = significantly worse candidate vs. baseline

We compute a confidence interval (CI) over the relative difference of means between metrics from the candidate and baseline commits, considering the baseline as the reference.

If the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD), the change is considered significant.

Feel free to reach out to #apm-benchmarking-platform on Slack if you have any questions.

More details about the CI and significant changes

You can imagine this CI as a range of values that is likely to contain the true difference of means between the candidate and baseline commits.

CIs of the difference of means are often centered around 0%, because often changes are not that big:

---------------------------------(------|---^--------)-------------------------------->
                              -0.6%    0%  0.3%     +1.2%
                                 |          |        |
         lower bound of the CI --'          |        |
sample mean (center of the CI) -------------'        |
         upper bound of the CI ----------------------'

As described above, a change is considered significant if the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD).

For instance, for an execution time metric, this confidence interval indicates a significantly worse performance:

----------------------------------------|---------|---(---------^---------)---------->
                                       0%        1%  1.3%      2.2%      3.1%
                                                  |   |         |         |
       significant impact threshold --------------'   |         |         |
                      lower bound of CI --------------'         |         |
       sample mean (center of the CI) --------------------------'         |
                      upper bound of CI ----------------------------------'

Unstable benchmarks

These benchmarks have a confidence interval too wide to call a change; treat them as noise rather than signal.

scenario:appsec-appsec-enabled-24

unstable execution_time [-168.822ms; +230.136ms] or [-6.434%; +8.770%]

scenario:appsec-appsec-enabled-26

unstable execution_time [-229526.199µs; +230022.799µs] or [-8.986%; +9.006%]

scenario:appsec-appsec-enabled-with-attacks-24

unstable execution_time [-168.382ms; +160.375ms] or [-5.459%; +5.199%]

scenario:appsec-appsec-enabled-with-attacks-26

unstable execution_time [-183.460ms; +186.236ms] or [-6.335%; +6.431%]

scenario:appsec-control-20

unstable execution_time [-123.785ms; +129.731ms] or [-7.520%; +7.881%]

scenario:appsec-control-24

unstable execution_time [-114.741ms; +111.465ms] or [-9.284%; +9.019%]

scenario:appsec-control-26

unstable execution_time [-122672.831µs; +124469.865µs] or [-9.975%; +10.121%]

scenario:appsec-iast-no-vulnerability-control-20

unstable execution_time [-11.702ms; +20.503ms] or [-4.550%; +7.972%]

scenario:appsec-iast-no-vulnerability-iast-enabled-always-active-20

unstable execution_time [-14209.039µs; +15171.839µs] or [-5.605%; +5.985%]

scenario:appsec-iast-no-vulnerability-iast-enabled-default-config-20

unstable execution_time [-10.818ms; +24.504ms] or [-4.142%; +9.382%]

scenario:appsec-iast-with-vulnerability-iast-enabled-always-active-20

unstable execution_time [-30703.584µs; +31821.372µs] or [-5.461%; +5.660%]

scenario:appsec-iast-with-vulnerability-iast-enabled-default-config-20

unstable execution_time [-19.190ms; +36.398ms] or [-3.498%; +6.635%]

scenario:child_process-shell-string-24

unstable cpu_usage_percentage [-6.680%; +3.928%]
unstable execution_time [-18.646ms; +26.062ms] or [-5.739%; +8.022%]
unstable throughput [-235787.889op/s; +192607.788op/s] or [-6.565%; +5.363%]

scenario:debugger-line-probe-with-snapshot-default-24

unstable cpu_user_time [-2080.451ms; +509.388ms] or [-23.344%; +5.716%]
unstable execution_time [-2120.168ms; +516.891ms] or [-22.011%; +5.366%]
unstable instructions [-18.0G instructions; +4.3G instructions] or [-24.615%; +5.941%]
unstable throughput [-190.479op/s; +595.773op/s] or [-5.540%; +17.327%]

scenario:debugger-line-probe-with-snapshot-minimal-24

unstable cpu_user_time [-1545.999ms; +484.625ms] or [-18.576%; +5.823%]
unstable execution_time [-1566.471ms; +481.505ms] or [-17.356%; +5.335%]
unstable instructions [-13.0G instructions; +4.3G instructions] or [-19.105%; +6.354%]
unstable throughput [-144.352op/s; +460.084op/s] or [-3.980%; +12.684%]

scenario:debugger-line-probe-with-snapshot-minimal-26

unstable cpu_user_time [-2018.146ms; +3323.694ms] or [-21.541%; +35.476%]
unstable execution_time [-1972.658ms; +3293.230ms] or [-19.524%; +32.595%]
unstable instructions [-18.1G instructions; +29.5G instructions] or [-23.213%; +37.912%]
unstable max_rss_usage [-6.458MB; +10.119MB] or [-4.062%; +6.366%]
unstable throughput [-724.960op/s; +420.371op/s] or [-22.322%; +12.944%]

scenario:debugger-line-probe-without-snapshot-26

unstable cpu_user_time [-2074.835ms; +3299.996ms] or [-22.247%; +35.384%]
unstable execution_time [-2101.295ms; +3294.136ms] or [-20.893%; +32.754%]
unstable instructions [-18.2G instructions; +29.6G instructions] or [-23.397%; +38.004%]
unstable max_rss_usage [-7.189MB; +10.917MB] or [-4.530%; +6.879%]
unstable throughput [-722.558op/s; +463.123op/s] or [-22.132%; +14.185%]

scenario:dogstatsd-with-tags-20

unstable cpu_user_time [-506.511ms; +196.114ms] or [-10.390%; +4.023%]
unstable execution_time [-504.006ms; +194.868ms] or [-10.182%; +3.937%]
unstable throughput [-68558.924op/s; +171837.718op/s] or [-4.036%; +10.117%]

scenario:plugin-claude-agent-sdk-compact-stream-scan-24

unstable cpu_usage_percentage [-5.958%; +4.243%]

scenario:plugin-graphql-long-with-depth-off-20

unstable max_rss_usage [-8.138MB; +5.034MB] or [-6.277%; +3.883%]

scenario:plugin-graphql-long-with-depth-on-max-20

unstable cpu_user_time [-769.025ms; +712.842ms] or [-5.981%; +5.544%]
unstable execution_time [-772.887ms; +712.467ms] or [-5.879%; +5.420%]
unstable throughput [-3.271op/s; +3.586op/s] or [-5.341%; +5.856%]

scenario:plugin-mongodb-core-binary-hash-20

unstable execution_time [-123.599ms; +221.199ms] or [-4.021%; +7.195%]

scenario:plugin-mongodb-core-plain-find-26

unstable cpu_usage_percentage [-6.487%; +4.100%]
unstable execution_time [-132.132ms; +208.655ms] or [-6.267%; +9.897%]
unstable throughput [-280041.707op/s; +179245.256op/s] or [-7.134%; +4.566%]

scenario:scope-manager-scope_enabled-20

unstable execution_time [-14.304ms; +26.615ms] or [-4.612%; +8.582%]
unstable throughput [-64355.448op/s; +37389.156op/s] or [-7.354%; +4.272%]

scenario:test-optimization-large-suite-20

unstable max_rss_usage [-4.183MB; +6.192MB] or [-5.198%; +7.695%]

codecov · 2026-07-08T21:01:16Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.55%. Comparing base (f8d1b6f) to head (d605114).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9271      +/-   ##
==========================================
- Coverage   96.55%   96.55%   -0.01%     
==========================================
  Files         918      918              
  Lines      121410   121410              
  Branches    20900    21110     +210     
==========================================
- Hits       117229   117225       -4     
- Misses       4181     4185       +4

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undici 8.7.0 (nodejs/undici#5116) changed the default so a plain HTTP request through an HTTP proxy forwards an absolute-form request instead of tunneling via CONNECT. The ProxyAgent CONNECT-span regression test then sees no CONNECT request at all and fails asserting a finished CONNECT span. Passing proxyTunnel: true restores the tunnel; the option is a no-op on undici < 6.22.0, where CONNECT was always used. Refs: nodejs/undici#5116

github-actions Bot added the semver-patch label Jul 8, 2026

BridgeAR marked this pull request as ready for review July 8, 2026 21:17

BridgeAR requested a review from a team as a code owner July 8, 2026 21:17

BridgeAR requested review from bojbrook and removed request for a team July 8, 2026 21:17

BridgeAR marked this pull request as draft July 8, 2026 22:53

BridgeAR marked this pull request as ready for review July 9, 2026 07:47

tlhunter approved these changes Jul 14, 2026

View reviewed changes

tlhunter merged commit 57c374e into master Jul 14, 2026
690 of 691 checks passed

tlhunter deleted the BridgeAR/2026-07-08-undici-proxy-tunnel-connect-test branch July 14, 2026 19:16

This was referenced Jul 15, 2026

v6.4.0 proposal #9368

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v5.115.0 proposal #9369

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Overall package size

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Benchmarks

Explanation

More details about the CI and significant changes

Unstable benchmarks

scenario:appsec-appsec-enabled-24

scenario:appsec-appsec-enabled-26

scenario:appsec-appsec-enabled-with-attacks-24

scenario:appsec-appsec-enabled-with-attacks-26

scenario:appsec-control-20

scenario:appsec-control-24

scenario:appsec-control-26

scenario:appsec-iast-no-vulnerability-control-20

scenario:appsec-iast-no-vulnerability-iast-enabled-always-active-20

scenario:appsec-iast-no-vulnerability-iast-enabled-default-config-20

scenario:appsec-iast-with-vulnerability-iast-enabled-always-active-20

scenario:appsec-iast-with-vulnerability-iast-enabled-default-config-20

scenario:child_process-shell-string-24

scenario:debugger-line-probe-with-snapshot-default-24

scenario:debugger-line-probe-with-snapshot-minimal-24

scenario:debugger-line-probe-with-snapshot-minimal-26

scenario:debugger-line-probe-without-snapshot-26

scenario:dogstatsd-with-tags-20

scenario:plugin-claude-agent-sdk-compact-stream-scan-24

scenario:plugin-graphql-long-with-depth-off-20

scenario:plugin-graphql-long-with-depth-on-max-20

scenario:plugin-mongodb-core-binary-hash-20

scenario:plugin-mongodb-core-plain-find-26

scenario:scope-manager-scope_enabled-20

scenario:test-optimization-large-suite-20

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