Output
Konui Setup Time Analysis
Finding: Measurement Includes Network Latency
The konuiSetupMs metric currently measures from client timestamp to konsole call, which includes network time.
What 1307ms Actually Included
| 1. Network (browser → konui) | 85ms |
| 2. Request parsing + routing | ~1000ms |
| 3. Health check to konsole | ~100ms |
| 4. Session lookup | ~100ms |
Log Evidence
Request 80f37ca3 (1307ms setup): Client sent: 08:57:31.565Z Konui received: 08:57:32.873Z ← logged AFTER body parsing! Konsole called: 08:57:32.875Z Request 8e605bb3 (813ms setup): Client sent: 08:59:19.826Z Konui received: 08:59:20.640Z Konsole called: 08:59:20.643Z
Code Issue
// router.ts:1255-1257 const hopTiming = { konuiReceivedAt: new Date().toISOString(), // Captured AFTER body parsing clientTimestamp: request.headers.get("X-Client-Timestamp"), };
The timestamp is captured at line 1257, but body parsing happens at lines 1201-1249. This skews the measurement.
Why the Variance?
The 1307ms vs 813ms difference is likely due to:
- Network jitter - Browser → server latency varies
- Server load - Deno event loop may have been busy
- First request after restart - Module loading, cache warming
✓ Recommendation
Move konuiReceivedAt timestamp capture to the START of the request handler (before body parsing) for accurate measurement.
What's Next?
Choose an action:
Quick Actions
Original Request
No layout configured
Details
Type
General
Status
Completed
Scope
vibetools
Tags
performancetelemetryconsole
Created
3 Jan 2026, 7:03 pm
Updated
3 Jan 2026, 7:03 pm
Created By
claude
Raw Data
{
"id": "472f11e5-0644-46f9-bdd6-229feb2b1914",
"type": "general",
"status": "completed",
"title": "Konui Setup Time Analysis",
"description": "Root cause analysis of 1307ms konui setup time",
"context": {
"output": "<div style=\"background:#1e1e1e;color:#e0e0e0;padding:20px;border-radius:8px;font-family:'Consolas','Monaco',monospace;\"><h2 style=\"font-family:sans-serif;color:#fff;margin:0 0 16px 0;\">Konui Setup Time Analysis</h2><div style=\"background:#f9731620;border:1px solid #f97316;padding:16px;border-radius:6px;margin-bottom:16px;\"><h4 style=\"margin:0 0 8px 0;color:#f97316;\">Finding: Measurement Includes Network Latency</h4><p style=\"color:#e0e0e0;margin:0;\">The <code style=\"background:#2d2d2d;padding:2px 6px;border-radius:3px;\">konuiSetupMs</code> metric currently measures from <strong>client timestamp</strong> to <strong>konsole call</strong>, which includes network time.</p></div><div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\"><h4 style=\"margin:0 0 12px 0;color:#61afef;\">What 1307ms Actually Included</h4><table style=\"width:100%;border-collapse:collapse;\"><tr style=\"border-bottom:1px solid #3d3d3d;\"><td style=\"padding:10px 0;color:#9ca3af;\">1. Network (browser → konui)</td><td style=\"padding:10px;color:#98c379;text-align:right;\">85ms</td></tr><tr style=\"border-bottom:1px solid #3d3d3d;\"><td style=\"padding:10px 0;color:#9ca3af;\">2. Request parsing + routing</td><td style=\"padding:10px;color:#e5c07b;text-align:right;\">~1000ms</td></tr><tr style=\"border-bottom:1px solid #3d3d3d;\"><td style=\"padding:10px 0;color:#9ca3af;\">3. Health check to konsole</td><td style=\"padding:10px;color:#c678dd;text-align:right;\">~100ms</td></tr><tr><td style=\"padding:10px 0;color:#9ca3af;\">4. Session lookup</td><td style=\"padding:10px;color:#61afef;text-align:right;\">~100ms</td></tr></table></div><div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\"><h4 style=\"margin:0 0 12px 0;color:#c678dd;\">Log Evidence</h4><pre style=\"background:#1e1e1e;padding:12px;border-radius:4px;overflow-x:auto;margin:0;color:#e0e0e0;font-size:0.85em;\"><span style=\"color:#7f848e;\">Request 80f37ca3 (1307ms setup):</span>\nClient sent: <span style=\"color:#98c379;\">08:57:31.565Z</span>\nKonui received: <span style=\"color:#e5c07b;\">08:57:32.873Z</span> <span style=\"color:#7f848e;\">← logged AFTER body parsing!</span>\nKonsole called: <span style=\"color:#61afef;\">08:57:32.875Z</span>\n\n<span style=\"color:#7f848e;\">Request 8e605bb3 (813ms setup):</span>\nClient sent: <span style=\"color:#98c379;\">08:59:19.826Z</span>\nKonui received: <span style=\"color:#e5c07b;\">08:59:20.640Z</span>\nKonsole called: <span style=\"color:#61afef;\">08:59:20.643Z</span></pre></div><div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\"><h4 style=\"margin:0 0 12px 0;color:#98c379;\">Code Issue</h4><pre style=\"background:#1e1e1e;padding:12px;border-radius:4px;overflow-x:auto;margin:0;color:#e0e0e0;font-size:0.85em;\"><span style=\"color:#7f848e;\">// router.ts:1255-1257</span>\n<span style=\"color:#c678dd;\">const</span> hopTiming = {\n konuiReceivedAt: <span style=\"color:#98c379;\">new Date().toISOString()</span>, <span style=\"color:#7f848e;\">// Captured AFTER body parsing</span>\n clientTimestamp: request.headers.get(<span style=\"color:#e5c07b;\">\"X-Client-Timestamp\"</span>),\n};</pre><p style=\"color:#9ca3af;margin:12px 0 0 0;font-size:0.9em;\">The timestamp is captured at line 1257, but body parsing happens at lines 1201-1249. This skews the measurement.</p></div><div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\"><h4 style=\"margin:0 0 12px 0;color:#f97316;\">Why the Variance?</h4><p style=\"color:#e0e0e0;margin:0 0 8px 0;\">The 1307ms vs 813ms difference is likely due to:</p><ul style=\"margin:0;padding-left:20px;color:#e0e0e0;line-height:1.8;\"><li><strong>Network jitter</strong> - Browser → server latency varies</li><li><strong>Server load</strong> - Deno event loop may have been busy</li><li><strong>First request after restart</strong> - Module loading, cache warming</li></ul></div><div style=\"background:#22c55e20;border:1px solid #22c55e;padding:16px;border-radius:6px;\"><h4 style=\"margin:0 0 8px 0;color:#22c55e;\">✓ Recommendation</h4><p style=\"color:#e0e0e0;margin:0;\">Move <code style=\"background:#2d2d2d;padding:2px 6px;border-radius:3px;\">konuiReceivedAt</code> timestamp capture to the START of the request handler (before body parsing) for accurate measurement.</p></div><div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-top:16px;\"><h4 style=\"margin:0 0 8px 0;color:#fff;\">What's Next?</h4><p style=\"color:#9ca3af;margin:0;\">Choose an action:</p></div></div>",
"requestId": "a9ce32a0-51b5-4968-9c93-d087fc096022",
"requestedAt": "2026-01-03T19:00:32Z",
"choices": [
{
"label": "Fix timestamp placement",
"value": "Move konuiReceivedAt timestamp capture to the start of the request handler before body parsing for accurate measurement",
"primary": true
},
{
"label": "Add detailed timing",
"value": "Add more granular timing breakdowns (body parse time, health check time, session lookup time)"
},
{
"label": "Continue - this is expected",
"value": "The timing is acceptable, move on to other work"
}
]
},
"createdBy": "claude",
"createdAt": "2026-01-03T09:03:05.574Z",
"updatedAt": "2026-01-03T09:03:05.716Z",
"requestId": "a9ce32a0-51b5-4968-9c93-d087fc096022",
"scope": "vibetools",
"tags": [
"performance",
"telemetry",
"console"
],
"targetUser": "claude"
}