fix: replace async setInterval with recursive setTimeout in VAD loop and participant polling

[Siddh2024]

Reliability fix: Replace async setInterval with recursive setTimeout in VAD loop and participant polling (#876)

Problem:
setInterval with async callbacks was used in two critical paths:

1. VAD analysis loop in src/offscreen.ts
2. Participant polling loop in src/content.ts

This caused:

• Unhandled promise rejections when async callbacks threw errors
• Overlapping async executions when callback duration exceeded the interval
• Timer drift accumulation over long meetings
• Silent failure mode in participant polling

Changes:

offscreen.ts:

• Extracted VAD loop logic into dedicated async vadLoop() function
• Replaced setInterval with recursive setTimeout via vadTimer
• Removed unused isVadBusy flag (no longer needed - recursive setTimeout naturally serializes)
• Added proper stop check before scheduling next tick
• Removed early-return pattern on isVadBusy (no longer applicable)

content.ts:

• Extracted participant polling into async pollParticipants() function
• Replaced setInterval with recursive setTimeout via participantPollTimer
• Added proper error logging with console.debug instead of empty catch
• Added finally block to ensure next poll is always scheduled
• Changed clearInterval to clearTimeout in all cleanup paths

Benefits:

• Async work completes before next tick starts (no overlap)
• Errors are properly caught and logged
• Timer drift is eliminated
• Cleanup is straightforward (just clearTimeout)
• Production debuggability improved

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📥 Commits

Reviewing files that changed from the base of the PR and between d216444 and ecc0392.

📒 Files selected for processing (2)

• src/content.ts
• src/offscreen.ts

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[github-actions]

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[github-actions]

👋 Thank you @Siddh2024 for your contribution to Late-Meet!

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud