v6.6.0 proposal

[dd-octo-sts]

Features

• Profiling: Pack column numbers for server-side unminification #9501

Fixes

• Test Optimization: Complete test runs after subscriber loss #9381

Internal (CI, Testing, Benchmarking)

• Dependencies: Bump pnpm #9498

[dd-octo-sts]

Overall package size

Self size: 7.48 MB
Deduped: 8.14 MB
No deduping: 8.14 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | import-in-the-middle | 3.3.2 | 124.41 kB | 440.65 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-datadog-us1-prod]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 99.54%
• Overall Coverage: 98.43%

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 808d7cb | Docs | Datadog PR Page | Give us feedback!}

[pr-commenter]

Benchmarks

Benchmark execution time: 2026-07-23 11:51:02

Comparing candidate commit 808d7cb in PR branch v6.6.0-proposal with baseline commit 3b026a5 in branch v6.x.

📊 Benchmarking dashboard

Found 0 performance improvements and 0 performance regressions! Performance is the same for 2320 metrics, 38 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 [-167.286ms; +231.761ms] or [-6.395%; +8.860%]

scenario:appsec-appsec-enabled-26

• unstable execution_time [-227.008ms; +169.943ms] or [-8.987%; +6.728%]

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

• unstable execution_time [-162.340ms; +166.415ms] or [-5.269%; +5.401%]

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

• unstable execution_time [-191.788ms; +189.673ms] or [-6.601%; +6.528%]

scenario:appsec-control-20

• unstable execution_time [-117.270ms; +127.588ms] or [-7.136%; +7.764%]

scenario:appsec-control-24

• unstable execution_time [-115830.672µs; +114156.938µs] or [-9.320%; +9.185%]

scenario:appsec-control-26

• unstable execution_time [-120.973ms; +116.060ms] or [-9.758%; +9.362%]

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

• unstable execution_time [-14585.016µs; +15874.721µs] or [-5.710%; +6.215%]

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

• unstable execution_time [-10.564ms; +16.339ms] or [-4.092%; +6.329%]

scenario:appsec-iast-with-vulnerability-control-20

• unstable execution_time [-31443.060µs; +31738.260µs] or [-5.744%; +5.797%]

scenario:child_process-file-args-24

• unstable execution_time [-22.859ms; +33.843ms] or [-4.797%; +7.102%]
• unstable throughput [-135570.454op/s; +93714.717op/s] or [-6.188%; +4.278%]

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

• unstable cpu_user_time [-1771.925ms; +564.710ms] or [-21.331%; +6.798%]
• unstable execution_time [-1789.980ms; +563.189ms] or [-19.873%; +6.253%]
• unstable instructions [-15.0G instructions; +4.8G instructions] or [-22.186%; +7.167%]
• unstable throughput [-148.197op/s; +477.391op/s] or [-4.051%; +13.050%]

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

• unstable cpu_user_time [-2380.311ms; +4250.483ms] or [-24.498%; +43.745%]
• unstable execution_time [-2381.028ms; +4269.858ms] or [-22.780%; +40.851%]
• unstable instructions [-21.2G instructions; +37.9G instructions] or [-26.163%; +46.802%]
• unstable max_rss_usage [-8.450MB; +13.957MB] or [-5.306%; +8.763%]
• unstable throughput [-870.595op/s; +471.212op/s] or [-27.414%; +14.838%]

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

• unstable cpu_user_time [-1759.413ms; +590.356ms] or [-21.197%; +7.113%]
• unstable execution_time [-1821.444ms; +632.132ms] or [-20.233%; +7.022%]
• unstable instructions [-15.0G instructions; +4.9G instructions] or [-22.129%; +7.191%]
• unstable throughput [-173.980op/s; +474.998op/s] or [-4.745%; +12.955%]

scenario:debugger-line-probe-without-snapshot-24

• unstable cpu_user_time [-1690.752ms; +618.739ms] or [-20.244%; +7.408%]
• unstable execution_time [-1706.045ms; +638.211ms] or [-18.873%; +7.060%]
• unstable instructions [-14.6G instructions; +5.4G instructions] or [-21.464%; +7.892%]
• unstable throughput [-186.632op/s; +449.747op/s] or [-5.124%; +12.347%]

scenario:dogstatsd-with-tags-20

• unstable cpu_user_time [-232.584ms; +410.425ms] or [-4.712%; +8.315%]
• unstable execution_time [-235.324ms; +414.562ms] or [-4.700%; +8.280%]
• unstable throughput [-140763.979op/s; +89651.364op/s] or [-8.426%; +5.366%]

scenario:fs-subscribed-24

• unstable execution_time [-17.412ms; +28.901ms] or [-4.319%; +7.169%]

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

• unstable cpu_usage_percentage [-8.372%; +1.803%]

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

• unstable max_rss_usage [-34486.725KB; +33815.925KB] or [-8.533%; +8.367%]

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

• unstable max_rss_usage [-6978.592KB; +7876.878KB] or [-5.417%; +6.114%]

scenario:plugin-graphql-long-with-depth-off-26

• unstable max_rss_usage [-39.387MB; +17.500MB] or [-18.054%; +8.022%]

scenario:plugin-pg-service-26

• unstable execution_time [-95.340ms; +34.641ms] or [-10.462%; +3.801%]

[codecov]

Codecov Report

❌ Patch coverage is 99.54545% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (v6.x@3b026a5). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...ackages/datadog-instrumentations/src/mocha/main.js	98.73%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             v6.x    #9504   +/-   ##
=======================================
  Coverage        ?   98.43%           
=======================================
  Files           ?      941           
  Lines           ?   126966           
  Branches        ?    10806           
=======================================
  Hits            ?   124983           
  Misses          ?     1983           
  Partials        ?        0           

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