feat(profiling): pack column numbers for server-side unminification by szegedi · Pull Request #9501 · DataDog/dd-trace-js

szegedi · 2026-07-23T10:30:55Z

What does this PR do?

Updates the profiler to 5.17.0. Also turns on emission of column information for profile frames that need server-side unminification.

Motivation

A customer reported issue where the lack of column information prevents correct unminification of profiles in the backend.

Jira: PROF-15467

Set columnNumbers: 'pack' on the wall profiler and pass 'pack' to the space profiler's heap.profile call. pprof 5.17.0 packs the column into the line only for frames whose source map is declared but missing (dd:has-missing-map-files) — exactly the frames sent for server-side unminification — so this lets the backend deobfuscate minified Node.js (e.g. Next.js server) frames, where the column is the only discriminator between functions on a single generated line. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

dd-octo-sts · 2026-07-23T10:31:50Z

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-official · 2026-07-23T10:36:34Z

Tests

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🔄 Datadog retried 1 test - 1 passed on retry

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 98.44% (+0.00%)

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

🔗 Commit SHA: 992d42b | Docs | Datadog PR Page | Give us feedback!}

pr-commenter · 2026-07-23T10:40:07Z

Benchmarks

Benchmark execution time: 2026-07-23 10:40:03

Comparing candidate commit 992d42b in PR branch szegedi/update-profiler-5.17.0 with baseline commit ad76b96 in branch master.

📊 Benchmarking dashboard

Found 0 performance improvements and 0 performance regressions! Performance is the same for 2323 metrics, 35 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 [-211048.234µs; +210252.201µs] or [-7.898%; +7.868%]

scenario:appsec-appsec-enabled-26

unstable execution_time [-229588.077µs; +228615.143µs] or [-9.002%; +8.963%]

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

unstable execution_time [-169.391ms; +162.000ms] or [-5.458%; +5.220%]

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

unstable execution_time [-186.398ms; +190.586ms] or [-6.397%; +6.541%]

scenario:appsec-control-20

unstable execution_time [-129.980ms; +118.895ms] or [-7.972%; +7.292%]

scenario:appsec-control-24

unstable execution_time [-115.196ms; +119.064ms] or [-9.253%; +9.564%]

scenario:appsec-control-26

unstable execution_time [-126663.239µs; +126790.172µs] or [-10.188%; +10.198%]

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

unstable execution_time [-16085.037µs; +14634.251µs] or [-6.348%; +5.775%]

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

unstable execution_time [-17782.352µs; +16303.019µs] or [-6.793%; +6.228%]

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

unstable cpu_user_time [-2010.855ms; +3217.948ms] or [-24.221%; +38.761%]
unstable execution_time [-2164.932ms; +3384.792ms] or [-24.008%; +37.536%]
unstable instructions [-17.1G instructions; +27.2G instructions] or [-25.197%; +40.205%]
unstable max_rss_usage [-8.460MB; +13.244MB] or [-5.394%; +8.445%]
unstable throughput [-877.958op/s; +568.574op/s] or [-23.970%; +15.523%]

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

unstable cpu_user_time [-1735.925ms; +566.240ms] or [-20.913%; +6.822%]
unstable execution_time [-1760.991ms; +579.307ms] or [-19.536%; +6.427%]
unstable instructions [-15.0G instructions; +4.8G instructions] or [-22.208%; +7.109%]
unstable throughput [-157.384op/s; +469.414op/s] or [-4.307%; +12.847%]

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

unstable cpu_user_time [-4623.001ms; +3077.536ms] or [-41.866%; +27.870%]
unstable execution_time [-4683.589ms; +3080.573ms] or [-39.798%; +26.177%]
unstable instructions [-41.0G instructions; +27.2G instructions] or [-43.942%; +29.169%]
unstable max_rss_usage [-14.771MB; +9.806MB] or [-9.019%; +5.987%]
unstable throughput [-611.840op/s; +922.796op/s] or [-20.754%; +31.302%]

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

unstable cpu_user_time [-2614.406ms; +4159.289ms] or [-27.451%; +43.673%]
unstable execution_time [-2614.920ms; +4162.577ms] or [-25.516%; +40.618%]
unstable instructions [-23.4G instructions; +37.2G instructions] or [-29.448%; +46.796%]
unstable max_rss_usage [-8.295MB; +13.969MB] or [-5.242%; +8.828%]
unstable throughput [-820.925op/s; +515.682op/s] or [-25.377%; +15.941%]

scenario:dogstatsd-with-tags-20

unstable cpu_user_time [-123.677ms; +455.291ms] or [-2.535%; +9.331%]
unstable execution_time [-124.072ms; +449.943ms] or [-2.506%; +9.086%]
unstable throughput [-159201.212op/s; +41373.937op/s] or [-9.399%; +2.443%]

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

unstable max_rss_usage [-34.361MB; +37.236MB] or [-8.548%; +9.264%]

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

unstable max_rss_usage [-6925.437KB; +8627.151KB] or [-5.305%; +6.608%]

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

unstable max_rss_usage [-35.920MB; +25.747MB] or [-17.606%; +12.620%]

scenario:test-optimization-large-suite-20

unstable max_rss_usage [-4269.803KB; +3995.137KB] or [-5.439%; +5.090%]

codecov · 2026-07-23T10:48:34Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (master@ad76b96). Learn more about missing BASE report.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #9501   +/-   ##
=========================================
  Coverage          ?   98.44%           
=========================================
  Files             ?      941           
  Lines             ?   126966           
  Branches          ?    10723           
=========================================
  Hits              ?   124997           
  Misses            ?     1969           
  Partials          ?        0

Flag	Coverage Δ
aiguard	`57.50% <ø> (?)`
aiguard-integration	`56.33% <ø> (?)`
apm-bucket-0	`57.75% <ø> (?)`
apm-bucket-1	`64.04% <ø> (?)`
apm-bucket-2	`62.81% <ø> (?)`
apm-bucket-3	`60.17% <ø> (?)`
apm-capabilities-tracing	`64.61% <0.00%> (?)`
apm-integrations-aerospike	`56.75% <ø> (?)`
apm-integrations-confluentinc-kafka-javascript	`61.68% <ø> (?)`
apm-integrations-couchbase	`57.19% <ø> (?)`
apm-integrations-http	`62.82% <ø> (?)`
apm-integrations-kafkajs	`62.24% <ø> (?)`
apm-integrations-next	`59.29% <ø> (?)`
apm-integrations-prisma	`58.76% <ø> (?)`
appsec	`72.94% <ø> (?)`
appsec-express_fastify_graphql	`70.44% <ø> (?)`
appsec-integration	`51.51% <ø> (?)`
appsec-kafka_ldapjs_lodash	`64.02% <ø> (?)`
appsec-mongodb-core_mongoose_mysql	`67.74% <ø> (?)`
appsec-next	`57.61% <ø> (?)`
appsec-node-serialize_passport_postgres	`67.41% <ø> (?)`
appsec-sourcing_stripe_template	`65.76% <ø> (?)`
debugger	`64.95% <ø> (?)`
instrumentations-bucket-0	`51.84% <ø> (?)`
instrumentations-bucket-1	`60.34% <ø> (?)`
instrumentations-bucket-10	`62.14% <ø> (?)`
instrumentations-bucket-11	`51.75% <ø> (?)`
instrumentations-bucket-12	`52.32% <ø> (?)`
instrumentations-bucket-13	`51.86% <ø> (?)`
instrumentations-bucket-2	`53.75% <ø> (?)`
instrumentations-bucket-3	`59.34% <ø> (?)`
instrumentations-bucket-4	`52.41% <ø> (?)`
instrumentations-bucket-5	`57.65% <ø> (?)`
instrumentations-bucket-6	`60.86% <ø> (?)`
instrumentations-bucket-7	`58.53% <ø> (?)`
instrumentations-bucket-8	`59.67% <ø> (?)`
instrumentations-bucket-9	`61.66% <ø> (?)`
instrumentations-instrumentation-couchbase	`51.15% <ø> (?)`
instrumentations-integration-esbuild	`34.25% <ø> (?)`
llmobs-ai_anthropic_bedrock	`62.85% <ø> (?)`
llmobs-bucket-1	`61.65% <ø> (?)`
llmobs-openai	`62.79% <ø> (?)`
llmobs-sdk	`66.25% <ø> (?)`
llmobs-vertex-ai	`59.29% <ø> (?)`
master-coverage	`98.44% <100.00%> (?)`
openfeature	`56.21% <ø> (?)`
openfeature-unit	`53.51% <ø> (?)`
platform-core_esbuild_instrumentations-misc	`40.62% <ø> (?)`
platform-integration	`61.52% <ø> (?)`
platform-shimmer_unit-guardrails_webpack	`39.24% <ø> (?)`
plugins-bucket-0	`57.15% <ø> (?)`
plugins-bucket-1	`54.46% <ø> (?)`
plugins-bucket-11	`62.38% <ø> (?)`
plugins-bucket-18	`62.07% <ø> (?)`
plugins-bucket-19	`60.17% <ø> (?)`
plugins-bucket-20	`62.17% <ø> (?)`
plugins-bucket-4	`58.69% <ø> (?)`
plugins-bullmq_cassandra_cookie	`61.86% <ø> (?)`
plugins-cookie-parser_crypto_dd-trace-api	`56.85% <ø> (?)`
plugins-fetch_fs_generic-pool	`58.89% <ø> (?)`
plugins-google-cloud-pubsub_grpc_handlebars	`64.80% <ø> (?)`
plugins-hapi_hono_ioredis	`60.34% <ø> (?)`
plugins-jest_knex_langgraph	`55.71% <ø> (?)`
plugins-ldapjs_light-my-request_limitd-client	`58.62% <ø> (?)`
plugins-lodash_mariadb_memcached	`58.12% <ø> (?)`
plugins-moleculer_mongodb_mongodb-core	`62.03% <ø> (?)`
plugins-mongoose_multer_mysql	`59.13% <ø> (?)`
plugins-mysql2_nats_node-serialize	`60.83% <ø> (?)`
plugins-opensearch_passport-http_pino	`59.66% <ø> (?)`
plugins-postgres_process_pug	`58.39% <ø> (?)`
plugins-redis_router_sequelize	`62.16% <ø> (?)`
plugins-test-and-upstream-rhea_undici_url	`61.74% <ø> (?)`
plugins-valkey_vm_winston	`58.13% <ø> (?)`
plugins-ws	`59.72% <ø> (?)`
profiling	`62.25% <100.00%> (?)`
serverless-aws-sdk-aws-sdk	`55.15% <ø> (?)`
serverless-aws-sdk-bedrockruntime	`54.86% <ø> (?)`
serverless-aws-sdk-client	`56.54% <ø> (?)`
serverless-aws-sdk-dynamodb	`55.77% <ø> (?)`
serverless-aws-sdk-eventbridge	`49.48% <ø> (?)`
serverless-aws-sdk-kinesis	`59.45% <ø> (?)`
serverless-aws-sdk-lambda	`57.50% <ø> (?)`
serverless-aws-sdk-s3	`55.71% <ø> (?)`
serverless-aws-sdk-serverless-peer-service	`59.85% <ø> (?)`
serverless-aws-sdk-sns	`60.24% <ø> (?)`
serverless-aws-sdk-sqs	`60.68% <ø> (?)`
serverless-aws-sdk-stepfunctions	`55.69% <ø> (?)`
serverless-aws-sdk-util	`51.59% <ø> (?)`
serverless-bucket-0	`54.35% <ø> (?)`
serverless-bucket-1	`59.37% <ø> (?)`
test-optimization-cucumber	`72.01% <ø> (?)`
test-optimization-cypress	`65.89% <ø> (?)`
test-optimization-jest	`73.32% <ø> (?)`
test-optimization-mocha	`73.58% <ø> (?)`
test-optimization-playwright-playwright-atr	`60.27% <ø> (?)`
test-optimization-playwright-playwright-efd	`60.66% <ø> (?)`
test-optimization-playwright-playwright-final-status	`60.63% <ø> (?)`
test-optimization-playwright-playwright-impacted-tests	`60.36% <ø> (?)`
test-optimization-playwright-playwright-reporting	`61.66% <ø> (?)`
test-optimization-playwright-playwright-test-management	`61.33% <ø> (?)`
test-optimization-playwright-playwright-test-span	`60.58% <ø> (?)`
test-optimization-selenium	`60.14% <ø> (?)`
test-optimization-testopt	`58.58% <ø> (?)`
test-optimization-vitest	`70.36% <ø> (?)`

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

…9501) * feat(profiling): pack column numbers for server-side unminification Updates profiler to 5.17.0, and then sets columnNumbers: 'pack' on the wall profiler and pass 'pack' to the space profiler's heap.profile call. pprof 5.17.0 packs the column into the line only for frames whose source map is declared but missing (dd:has-missing-map-files) — exactly the frames sent for server-side unminification — so this lets the backend deobfuscate minified Node.js (e.g. Next.js server) frames, where the column is the only discriminator between functions on a single generated line.

szegedi and others added 2 commits July 23, 2026 12:19

Update profiler to 5.17.0

840ec91

szegedi added the semver-minor label Jul 23, 2026

szegedi requested review from a team as code owners July 23, 2026 10:30

github-actions Bot added the profiling label Jul 23, 2026

szegedi requested a review from IlyasShabi July 23, 2026 10:31

IlyasShabi approved these changes Jul 23, 2026

View reviewed changes

szegedi merged commit 0bbf75c into master Jul 23, 2026
662 of 663 checks passed

szegedi deleted the szegedi/update-profiler-5.17.0 branch July 23, 2026 10:56

This was referenced Jul 23, 2026

v6.6.0 proposal #9504

Merged

v5.117.0 proposal #9505

Merged

Uh oh!

Conversation

szegedi commented Jul 23, 2026 • edited by atlassian Bot Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

What does this PR do?

Motivation

Uh oh!

dd-octo-sts Bot commented Jul 23, 2026

Overall package size

Uh oh!

datadog-official Bot commented Jul 23, 2026 • edited by datadog-prod-us1-6 Bot Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

pr-commenter Bot commented Jul 23, 2026

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-iast-enabled-always-active-20

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

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-graphql-long-with-depth-and-collapse-off-20

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

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

scenario:test-optimization-large-suite-20

Uh oh!

codecov Bot commented Jul 23, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Codecov Report

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

szegedi commented Jul 23, 2026 •

edited by atlassian Bot

Loading

datadog-official Bot commented Jul 23, 2026 •

edited by datadog-prod-us1-6 Bot

Loading

codecov Bot commented Jul 23, 2026 •

edited

Loading