fix(core): Measure callback-style native module calls until completion - #6561
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alwx wants to merge 5 commits into
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fix(core): Measure callback-style native module calls until completion#6561alwx wants to merge 5 commits into
alwx wants to merge 5 commits into
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`wrapTurboModule` only knew two completion signals: a plain return and a thenable return. Bridge methods that report completion through success/failure callbacks return `undefined`, so they were closed on return and recorded as sync calls with a near-zero duration. RN's `genMethod` confirms the shape — for `type: 'async'` the generated wrapper returns nothing and hands the trailing callbacks to `enqueueNativeCall`. The same source fixes the argument convention: last argument is the success callback, second-to-last the failure one, and a non-function may never follow a function. Only the Old Architecture bridge guarantees that, so failure callbacks are counted as errors there and left unflagged on the New Architecture rather than guessing and corrupting `errorCount`. The crash-attribution frame is still popped synchronously. Holding it until a callback that may never fire would risk blaming this module for an unrelated later native crash — a regression on the very feature the frame exists for. Only the timing record is deferred. Records are bounded without timers: a cap plus an amortised age sweep on insert. A call closed out that way is still counted, with a zero duration — dropping it would hide the method from the aggregate entirely, which is worse than the ~0ms this fixes. The same clamp covers a callback firing implausibly late, which on the New Architecture may well be a long-lived subscription handler rather than a completion callback. The callback machinery lives in its own module because `wrapTurboModule.ts` would otherwise exceed oxlint's `max-lines`. Fixes #6542
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Semver Impact of This PR⚪ None (no version bump detected) 📋 Changelog PreviewThis is how your changes will appear in the changelog.
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…inline A method that invokes its trailing callback inline and then returns a thenable produced two aggregate rows for one invocation: the callback closed the record as `sync`, and the promise handlers recorded it again as `async`. The throw path already consulted `abandon()`'s return value; the thenable path discarded it. Whichever completion signal lands first now wins. Reported by Warden on #6561.
alwx
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August 5, 2026 09:14
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All good! LGTM after dealing with the AI review |
📲 Install BuildsAndroid
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iOS (legacy) Performance metrics 🚀
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| Revision | Plain | With Sentry | Diff |
|---|---|---|---|
| 3b6e9f9+dirty | 3851.90 ms | 1233.33 ms | -2618.57 ms |
| 5a23c47+dirty | 3855.46 ms | 1221.95 ms | -2633.50 ms |
| 7c6200e+dirty | 3854.87 ms | 1211.83 ms | -2643.03 ms |
| 100ce80+dirty | 3842.93 ms | 1229.52 ms | -2613.41 ms |
| 0bd8916+dirty | 3842.33 ms | 1230.76 ms | -2611.58 ms |
| 5789645+dirty | 3841.18 ms | 1220.67 ms | -2620.52 ms |
| a0d8cf8+dirty | 3842.33 ms | 1212.40 ms | -2629.93 ms |
| a9df5ce+dirty | 3852.73 ms | 1221.38 ms | -2631.35 ms |
| 9c84b9a+dirty | 3849.11 ms | 1218.66 ms | -2630.45 ms |
| 21a1e70+dirty | 3834.15 ms | 1218.43 ms | -2615.73 ms |
App size
| Revision | Plain | With Sentry | Diff |
|---|---|---|---|
| 3b6e9f9+dirty | 5.15 MiB | 6.68 MiB | 1.53 MiB |
| 5a23c47+dirty | 4.98 MiB | 6.46 MiB | 1.49 MiB |
| 7c6200e+dirty | 4.98 MiB | 6.56 MiB | 1.58 MiB |
| 100ce80+dirty | 5.15 MiB | 6.67 MiB | 1.51 MiB |
| 0bd8916+dirty | 5.15 MiB | 6.69 MiB | 1.53 MiB |
| 5789645+dirty | 4.98 MiB | 6.50 MiB | 1.52 MiB |
| a0d8cf8+dirty | 5.15 MiB | 6.67 MiB | 1.51 MiB |
| a9df5ce+dirty | 4.98 MiB | 6.55 MiB | 1.57 MiB |
| 9c84b9a+dirty | 4.98 MiB | 6.55 MiB | 1.57 MiB |
| 21a1e70+dirty | 4.98 MiB | 6.46 MiB | 1.49 MiB |
Contributor
iOS (new) Performance metrics 🚀
|
| Revision | Plain | With Sentry | Diff |
|---|---|---|---|
| 5fe1c6c+dirty | 1201.36 ms | 1209.15 ms | 7.78 ms |
| 7c6200e+dirty | 3828.16 ms | 1217.20 ms | -2610.95 ms |
| 41d6254+dirty | 3849.78 ms | 1233.91 ms | -2615.86 ms |
| 5789645+dirty | 3841.36 ms | 1214.81 ms | -2626.55 ms |
| a9df5ce+dirty | 3856.02 ms | 1225.22 ms | -2630.80 ms |
| 9c84b9a+dirty | 3833.41 ms | 1221.79 ms | -2611.62 ms |
| 1a2e7e0+dirty | 3852.95 ms | 1233.78 ms | -2619.18 ms |
| a636fa4+dirty | 3846.16 ms | 1210.10 ms | -2636.05 ms |
| 9b5615c+dirty | 3837.21 ms | 1215.33 ms | -2621.89 ms |
| 3d31fcf+dirty | 3857.46 ms | 1237.17 ms | -2620.29 ms |
App size
| Revision | Plain | With Sentry | Diff |
|---|---|---|---|
| 5fe1c6c+dirty | 3.38 MiB | 4.77 MiB | 1.39 MiB |
| 7c6200e+dirty | 5.08 MiB | 6.68 MiB | 1.60 MiB |
| 41d6254+dirty | 5.15 MiB | 6.70 MiB | 1.54 MiB |
| 5789645+dirty | 4.98 MiB | 6.50 MiB | 1.52 MiB |
| a9df5ce+dirty | 4.98 MiB | 6.55 MiB | 1.57 MiB |
| 9c84b9a+dirty | 4.98 MiB | 6.55 MiB | 1.57 MiB |
| 1a2e7e0+dirty | 4.98 MiB | 6.46 MiB | 1.49 MiB |
| a636fa4+dirty | 4.98 MiB | 6.55 MiB | 1.57 MiB |
| 9b5615c+dirty | 4.98 MiB | 6.51 MiB | 1.53 MiB |
| 3d31fcf+dirty | 4.98 MiB | 6.56 MiB | 1.58 MiB |
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📢 Type of change
📜 Description
wrapTurboModuleonly recognised two completion signals: a plain return and a thenable return. Bridge methods that report completion through success/failure callbacks returnundefined, so they were closed on return and recorded as sync calls with a near-zero duration — wrongturbo_module.*durations, andnative.turbo_moduleslow-call breadcrumbs that could never fire.Trailing completion callbacks are now wrapped, so the record closes when the callback fires. Details:
genMethodfixes the shape: last argument is the success callback, second-to-last the failure one, and a non-function argument may never follow a function.'promise'-typed methods never receive callbacks and are skipped — the thenable path already covers them.errorCount; those calls close without an error flag.kindstays'async'— no change toTurboModuleCallKind, the aggregate keys, or the API report.kind: 'sync', so RN's'sync'method type is not mislabelled.The callback machinery lives in a new
turboModuleCallbacks.tsbecausewrapTurboModule.tswould otherwise exceed oxlint'smax-lines. No public API change —api-extractorreports the surface unchanged.Fire-and-forget
type: 'async'methods that take no callback still have no completion signal at all and remain ~0ms. Not addressed here.💡 Motivation and Context
Fixes #6542, found by Cursor Bugbot on #6504. Callbacks are the dominant async shape on the Old Architecture bridge and are still used by some TurboModules, so this covered a large share of the calls the instrumentation reported on.
💚 How did you test it?
18 new tests — 16 unit (
test/turbomodule/wrapTurboModule.test.ts) and 2 end-to-end through the integration (test/integrations/turboModuleContext.test.ts), covering: duration measured to the callback, inline settle stayingsync, legacy failure-callback error attribution, no guessing on New Architecture, repeated callback invocations recorded once, receiver/argument/return pass-through, throwing callbacks, cap eviction, age sweep, the late-callback clamp,'promise'-typed methods untouched, non-trailing function arguments ignored, slow-call breadcrumbs, and span credit going to the span open at call start.Full local run:
jest1859 passed (+334 tools), oxlint 0/0, oxfmt clean,tsc -p tsconfig.build.jsonclean,api-extractorup to date,madgeno cycles.Not verified on a real device or simulator — the RN bridge method shape is modelled in tests, not executed.
📝 Checklist
sendDefaultPIIis enabled.🔮 Next steps
loggerimported from@sentry/coreinturbomodule/is the Sentry Logs API, not the debug logger (that'sdebug). The 6 pre-existinglogger.warncalls inwrapTurboModule.tsand 3 inwrapNativeModules.tstherefore capture log events from the wrap hot path — with a recursion flavour, since capturing a log goes through the wrappedRNSentry.captureEnvelope. New code here usesdebug; the pre-existing calls are left for a separate fix so this diff stays scoped.## UnreleasedinCHANGELOG.mdhas two### Fixesheadings (pre-existing onmain).sentry-conventionsattributes and the public-API lock are tracked in Turbo Modules: Documentation, migration guide, and public API #6168.