async_hooks: add trackPromises option to createHook() #61415
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This adds a trackPromises option that allows users to completely opt out of the promise hooks that are installed whenever an async hook is added. For those who do not need to track promises, this avoids the excessive hook invocation and the heavy overhead from it. This option was previously already implemented internally to skip the noise from promise hooks when debugging async operations via the V8 inspector. This patch just exposes it.
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #61415 +/- ##
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- Coverage 88.51% 88.51% -0.01%
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Files 704 704
Lines 208739 208896 +157
Branches 40274 40335 +61
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| will not have the `before` and `after` callbacks fired on them. For more details | ||
| see the details of the V8 [PromiseHooks][] API. | ||
| ### Disabling promise execution tracking |
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FWIW promise tracking might still be enabled because some other async_hooks instance is using it (e.g. domain, ALS in older node.js versions or if --no-async-context-frame is set).
not sure if it is worth to mention this somewhere here.
Flarna
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Jan 18, 2026
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This adds a trackPromises option that allows users to completely opt out of the promise hooks that are installed whenever an async hook is added. For those who do not need to track promises, this avoids the excessive hook invocation and the heavy overhead from it.
This option was previously already implemented internally to skip the noise from promise hooks when debugging async operations via the V8 inspector. This patch just exposes it.
Refs: #57148