How I cut mic activation latency in half by pre-warming WebSocket connections during TTS playback

📰 Dev.to AI

Pre-warming WebSocket connections during TTS playback can significantly reduce mic activation latency in AI interviewing apps

intermediate Published 25 Mar 2026
Action Steps
  1. Identify sequential WebSocket connections as a potential bottleneck in your application
  2. Open the STT WebSocket connection simultaneously with the TTS WebSocket connection establishment
  3. Implement pre-warming of WebSocket connections during TTS playback to reduce latency
Who Needs to Know This

Developers working on real-time voice interaction applications, such as AI interviewing apps or voice assistants, can benefit from this technique to improve user experience by reducing latency

Key Insight

💡 Pre-warming WebSocket connections during TTS playback can help reduce mic activation latency by allowing the STT connection to be established before the user's response is required

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💡 Cut mic activation latency in half by pre-warming WebSocket connections during TTS playback!
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