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Performance Megathread - Is your workflow run slow? Look here first
#1930 · VaguelySerious opened on May 5, 2026
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A `WorkflowWorldError` timeout is an unhandled rejection and kills the process (exit 128)

#3935

· fgascon opened

on Sep 2, 2026

@vercel/sandbox breaks the Next build: SWC plugin emits AnonymousClass.prototype[...] for the SDK's anonymous class expressions

#3929

· luca-primefold opened

on Sep 2, 2026

A sleep() that loses a Promise.race can never be closed, and one abandoned timer disables retention and inline deltas for the rest of the run

#3916

· shtefcs opened

on Sep 1, 2026

Detect and recover stranded hook resumes (committed hook_received, no delivered wake)

#3911

· pranaygp opened

on Aug 31, 2026

Local world: 30s undici transport timeout redelivers a live queue message and re-executes an in-flight lazy-inline step

#3909

· tano297 opened

on Aug 31, 2026

[builders] Valid use step directives are missed after raw backticks

#3900

· alaney2 opened

on Aug 31, 2026

virtual module error with workflow

#3859

· pranaygp opened

on Aug 27, 2026

Hardcoded dep version make it hard to patch vulnerabilities

#3842

· octavian-mto opened

on Aug 27, 2026

world-postgres queue delivery inherits undici's 300s fetch timeouts: healthy long-running deliveries are declared crashed and re-executed while still alive

#3811

· lunareed720 opened

on Aug 26, 2026

[nest] Steps bundle declares `require` twice with --module commonjs

#3778

· muffe opened

on Aug 25, 2026

world-postgres: startup recovery re-enqueues runs a LIVE peer process is executing — concurrent replay corrupts the event log

#3758

· himself65 opened

on Aug 24, 2026

Vercel World queue message waited 39m for first delivery with no redelivery

#3753

· aatosolavi opened

on Aug 23, 2026

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All issues

A `WorkflowWorldError` timeout is an unhandled rejection and kills the process (exit 128)

@vercel/sandbox breaks the Next build: SWC plugin emits AnonymousClass.prototype[...] for the SDK's anonymous class expressions

A sleep() that loses a Promise.race can never be closed, and one abandoned timer disables retention and inline deltas for the rest of the run

Detect and recover stranded hook resumes (committed hook_received, no delivered wake)

Local world: 30s undici transport timeout redelivers a live queue message and re-executes an in-flight lazy-inline step

[builders] Valid use step directives are missed after raw backticks

virtual module error with workflow

Hardcoded dep version make it hard to patch vulnerabilities

world-postgres queue delivery inherits undici's 300s fetch timeouts: healthy long-running deliveries are declared crashed and re-executed while still alive

[nest] Steps bundle declares `require` twice with --module commonjs

world-postgres: startup recovery re-enqueues runs a LIVE peer process is executing — concurrent replay corrupts the event log

Vercel World queue message waited 39m for first delivery with no redelivery

Uh oh!

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