fix: add exit handler to profiler

[BioPhoton]

Related:

• Implement performance profiling and trace file generation #1197

Followup:

• refactor: use sharded WAL #1231

---

Note

Introduces a production-ready Node.js profiler with safe shutdown and trace output, and modernizes process-exit utilities.

• New NodejsProfiler that auto-creates a WriteAheadLogFile, subscribes to process exit/fatal events, supports sharded trace paths, debug transition markers, stats/flush/filePath, and runtime enable/disable; extensive unit/integration tests and snapshots added
• Exit handling API revamped: installExitHandlers replaced by subscribeProcessExit (returns unsubscribe, idempotent, supports exitOnSignal/exitOnFatal/custom exit codes); tests updated
• WAL improvements: isLeaderWal/setLeaderWal renamed to isCoordinatorProcess/setCoordinatorProcess; ShardedWal gains coordinator detection via CP_SHARDED_WAL_COORDINATOR_ID; test updates
• Docs expanded: profiler features, NodeJSProfiler capabilities, exit handlers, configuration; sink mock extended with getPath
• Test utils added (omit-trace-json, awaitObserverCallbackAndFlush) to normalize trace snapshots

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---

☁️ Nx Cloud last updated this comment at 2026-01-27 21:59:42 UTC

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commit: a6da35d

[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared current commit 125089c with previous commit e47bf34.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Categories

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Performance	🔴 36	🔴 34
Documentation	🟡 53	🟡 53
Code coverage	🟢 93	🟢 93
Bug prevention	🟡 75	🟡 75
Axe Accessibility	🟡 88	🟡 88
Code style	🟢 100	🟢 100	–
Security	🔴 47	🔴 47	–
Updates	🟡 78	🟡 78	–
Type Safety	🟡 67	🟡 67	–
Miscellaneous	🟡 67	🟡 67	–
Accessibility	🟢 92	🟢 92	–
Best Practices	🟢 100	🟢 100	–
SEO	🟢 92	🟢 92	–

👍 2 groups improved, 👎 1 group regressed, 👍 7 audits improved, 👎 4 audits regressed, 14 audits changed without impacting score

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
Lighthouse	Performance	🔴 36	🔴 34
JSDocs coverage	Documentation coverage	🟡 53	🟡 53
Code coverage	Code coverage metrics	🟢 93	🟢 93

31 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
Lighthouse	Initial server response time was short	🟩 Root document took 480 ms	🟥 Root document took 610 ms
Lighthouse	Total Blocking Time	🟥 1,530 ms	🟥 2,400 ms
Lighthouse	First Contentful Paint	🟥 3.4 s	🟥 3.2 s
Lighthouse	Speed Index	🟥 7.1 s	🟥 7.3 s
JSDocs coverage	Methods coverage	🟨 11 undocumented methods	🟨 10 undocumented methods
JSDocs coverage	Properties coverage	🟥 38 undocumented properties	🟥 42 undocumented properties
JSDocs coverage	Variables coverage	🟥 273 undocumented variables	🟥 273 undocumented variables
JSDocs coverage	Functions coverage	🟥 582 undocumented functions	🟥 581 undocumented functions
Code coverage	Function coverage	🟩 94.3 %	🟩 94.3 %
Code coverage	Line coverage	🟩 92.7 %	🟩 92.7 %
Code coverage	Branch coverage	🟨 89.2 %	🟨 89.2 %
Lighthouse	Avoids enormous network payloads	🟩 Total size was 2,096 KiB	🟩 Total size was 2,095 KiB
Lighthouse	Minimizes main-thread work	🟥 10.2 s	🟥 9.5 s
Lighthouse	Server Backend Latencies	🟩 1,340 ms	🟩 690 ms
Lighthouse	Time to Interactive	🟥 13.4 s	🟥 13.6 s
Lighthouse	Metrics	🟩 100%	🟩 100%
Lighthouse	Reduce unused CSS	🟥 Potential savings of 125 KiB	🟥 Potential savings of 125 KiB
Lighthouse	Largest Contentful Paint	🟥 11.9 s	🟥 11.7 s
Lighthouse	JavaScript execution time	🟥 4.3 s	🟥 4.1 s
Lighthouse	Uses efficient cache policy on static assets	🟨 31 resources found	🟨 31 resources found
Lighthouse	Remove duplicate modules in JavaScript bundles	🟥 Potential savings of 88 KiB	🟥 Potential savings of 87 KiB
Lighthouse	Max Potential First Input Delay	🟥 1,050 ms	🟥 1,160 ms
Lighthouse	Reduce unused JavaScript	🟥 Potential savings of 226 KiB	🟥 Potential savings of 228 KiB
Lighthouse	Network Round Trip Times	🟩 60 ms	🟩 50 ms
TypeScript	Semantic errors	🟥 36 errors	🟥 37 errors

654 other audits are unchanged.

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[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared current commit 125089c with previous commit e47bf34.

💼 Project utils

🤨 Code PushUp report has both improvements and regressions.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Documentation	🟡 60	🟡 61
Code coverage	🟢 95	🟢 95

4 other categories are unchanged.

👍 2 groups improved, 👍 5 audits improved, 👎 2 audits regressed

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
JSDocs coverage	Documentation coverage	🟡 60	🟡 61
Code coverage	Code coverage metrics	🟢 95	🟢 95

13 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
JSDocs coverage	Methods coverage	🟨 11 undocumented methods	🟨 10 undocumented methods
JSDocs coverage	Properties coverage	🟥 35 undocumented properties	🟥 39 undocumented properties
JSDocs coverage	Variables coverage	🟥 50 undocumented variables	🟥 50 undocumented variables
JSDocs coverage	Functions coverage	🟥 244 undocumented functions	🟥 243 undocumented functions
Code coverage	Branch coverage	🟩 92 %	🟩 91.9 %
Code coverage	Function coverage	🟩 95.9 %	🟩 96 %
Code coverage	Line coverage	🟩 97.9 %	🟩 98 %

437 other audits are unchanged.

---

13 other projects are unchanged.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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