More than 10 call features subscribe to CallControl's state_update at once: the call bar, controls, hotkeys, AFK, muted-talk, join/leave sounds, announcements, rejoin, the policy toast, the glance, and the desktop thumbbar/SMTC. At the default limit, Node's events logged a MaxListenersExceededWarning, and the console kept the warning's emitter alive. That emitter is the CallControl, and through it the whole Element Call document: about 11 MB per call, per the audit.
Change:setMaxListeners(100). These are real listeners that unsubscribe on cleanup, not a leak.
Not reproduced here: headless web logs no warning, likely because there are fewer subscribers without the desktop hooks. This is the fix the issue measured: swallowing the warning freed every CallControl, and the heap levelled off. Worth confirming on the desktop app.
Fixes #316.
More than 10 call features subscribe to `CallControl`'s `state_update` at once: the call bar, controls, hotkeys, AFK, muted-talk, join/leave sounds, announcements, rejoin, the policy toast, the glance, and the desktop thumbbar/SMTC. At the default limit, Node's `events` logged a **MaxListenersExceededWarning**, and the console kept the warning's emitter alive. That emitter is the `CallControl`, and through it the whole Element Call document: **about 11 MB per call**, per the audit.
**Change:** `setMaxListeners(100)`. These are real listeners that unsubscribe on cleanup, not a leak.
**Not reproduced here:** headless web logs no warning, likely because there are fewer subscribers without the desktop hooks. This is the fix the issue measured: swallowing the warning freed every `CallControl`, and the heap levelled off. Worth confirming on the desktop app.
`tsc` clean · unit tests pass · ESLint clean.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5
More than 10 call features subscribe to CallControl's state_update at once
(call bar, controls, hotkeys, AFK, muted-talk, join/leave sounds,
announcements, rejoin, policy toast, glance, desktop thumbbar/SMTC). At
the default limit Node's events logged a MaxListenersExceededWarning, and
the console kept the warning's emitter (this CallControl, and through it
the whole Element Call document) alive: ~11 MB per call per the audit.
setMaxListeners(100); these are real, unsubscribed-on-cleanup listeners.
Not reproduced in this environment (headless web logs no warning: fewer
subscribers without the desktop hooks); this is the fix the issue
measured (swallowing the warning freed all CallControls).
Fixes#316
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5
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Fixes #316.
More than 10 call features subscribe to
CallControl'sstate_updateat once: the call bar, controls, hotkeys, AFK, muted-talk, join/leave sounds, announcements, rejoin, the policy toast, the glance, and the desktop thumbbar/SMTC. At the default limit, Node'seventslogged a MaxListenersExceededWarning, and the console kept the warning's emitter alive. That emitter is theCallControl, and through it the whole Element Call document: about 11 MB per call, per the audit.Change:
setMaxListeners(100). These are real listeners that unsubscribe on cleanup, not a leak.Not reproduced here: headless web logs no warning, likely because there are fewer subscribers without the desktop hooks. This is the fix the issue measured: swallowing the warning freed every
CallControl, and the heap levelled off. Worth confirming on the desktop app.tscclean · unit tests pass · ESLint clean.🤖 Generated with Claude Code
https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5