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Vapi agent taking 2-4 seconds to respond everytime...
# support
g
how can i make my vapi agent respond faster and fill up awkward silences during calls. the weird thing is the latency is only 725ms but its taking 2-4 secs everytime...
v
Hi there! 👋 I understand how frustrating those delays can be during calls. I don't have access to your specific implementation to determine exactly why there's a gap between your 725ms latency and the 2-4 second actual response time. However, I can definitely help with ways to make your Vapi agent respond faster and fill those awkward silences! ## Making Your Vapi Agent Respond Faster ### Adjust Configuration Settings Several Vapi configuration settings can directly impact response time: - Review settings like 
silenceTimeoutSeconds
, 
responseDelaySeconds
, and 
llmRequestDelaySeconds
which affect call setup and response times [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1332286268805087272) - Adjust 
numWordsToInterruptAssistant
(try 3-5 words) and 
maxDurationSeconds
(try 5-10 seconds) to control how quickly the AI responds [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334027136305991750) - Optimize endpointing behavior to reduce delays in recognizing silence [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1344633027925377064) ### Optimize Network and Server Performance - Use a Content Delivery Network (CDN) with edge locations close to your users [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336685825227755591) - Consider server location - hosting your server closer to your users can reduce latency [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334521938478891104) - Use fast and lightweight communication protocols like WebSockets [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336685825227755591) ## Filling Awkward Silences ### Conversation Flow Adjustments
- Adjust the conversation flow in your Vapi script by setting up additional prompts or logic that triggers automatically [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1335054553250533439) - Structure your script with placeholders for user responses to create a more natural conversational feel [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1335054553250533439) ### Use Idle Messages - Set up 
idleMessages
to trigger if the caller doesn't say anything [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1332286268805087272) - If no response is detected within a certain timeframe, send a follow-up message ### Utilize Backchanneling - Vapi simulates natural human conversation, including "backchanneling" which can help fill silences and show engagement [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336685825227755591) ## Identifying the Bottleneck To pinpoint what's causing your delays: - Use Langfuse's evaluation and debugging tools to analyze agent performance [(Vapi Docs)](https://docs.vapi.ai/providers/observability/langfuse) - Check Vapi logs for indications of issues [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336456720913797238) - Investigate network latency, API performance, voice application logic, resource utilization, third-party services, call volume, and your Vapi configuration [(Discord)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1332286268805087272) Is there a specific area from these suggestions you'd like me to elaborate on further? Sources: - [Discord Vapi Configuration Settings](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1332286268805087272)
- [Discord Adjusting numWordsToInterruptAssistant](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334027136305991750) - [Discord Endpointing Behavior](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1344633027925377064) - [Discord Network Infrastructure](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336685825227755591) - [Discord Server Location](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334521938478891104) - [Discord Conversation Flow Adjustments](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1335054553250533439) - [Vapi Docs Langfuse](https://docs.vapi.ai/providers/observability/langfuse) - [Discord VAPI Logs](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336456720913797238)
g
@User Hi, does making 'optimise streaming efficiency' to 'Less Latency' help?
s
Hey! To help track down this issue, could you share: - The call ID - When exactly this happened (the timestamp) - What response you expected to get - What response you actually got instead This would really help us figure out what went wrong!
g
@Shubham Bajaj smart endpointing solved the issue for me. Thank you.
s
Marking this ticket as Solved ✅
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