Add audio duration and processing factor per minute to dashboard statistics

src/services/stats_service.py

@@ -76,6 +76,26 @@ async def get_usage_stats(db: Session, days: int = 30):
         UsageLog.status == "success"
     ).scalar() or 0
     
+    # Average audio duration
+    avg_duration = db.query(func.avg(UsageLog.duration_seconds)).filter(
+        UsageLog.created_at >= since,
+        UsageLog.status == "success",
+        UsageLog.duration_seconds.isnot(None)
+    ).scalar() or 0
+    
+    # Processing factor (seconds processing time per minute of audio)
+    # Formula: (processing_time_ms / 1000) / duration_seconds * 60
+    processing_factor = db.query(
+        func.avg(
+            (UsageLog.processing_time_ms / 1000.0) / UsageLog.duration_seconds * 60
+        )
+    ).filter(
+        UsageLog.created_at >= since,
+        UsageLog.status == "success",
+        UsageLog.duration_seconds.isnot(None),
+        UsageLog.duration_seconds > 0
+    ).scalar() or 0
+    
     # Daily stats for chart
     daily_stats = db.query(
         func.date(UsageLog.created_at).label("date"),
@@ -96,6 +116,8 @@ async def get_usage_stats(db: Session, days: int = 30):
         "total_requests": total_requests,
         "success_rate": round(success_rate, 2),
         "avg_processing_time_ms": round(avg_time, 2),
+        "avg_duration_seconds": round(avg_duration, 2),
+        "processing_factor": round(processing_factor, 2),
         "daily_stats": [
             {"date": str(stat.date), "count": stat.count, "avg_time": round(stat.avg_time or 0, 2)}
             for stat in daily_stats

src/templates/dashboard.html

@@ -27,6 +27,14 @@
             <div class="stat-value">{{ "%.2f"|format(stats.avg_processing_time_ms / 1000) }}s</div>
             <div class="stat-label">Ø Processing Time</div>
         </div>
+        <div class="stat-card">
+            <div class="stat-value">{{ "%.2f"|format(stats.avg_duration_seconds) }}s</div>
+            <div class="stat-label">Ø Audio Duration</div>
+        </div>
+        <div class="stat-card">
+            <div class="stat-value">{{ stats.processing_factor }}s</div>
+            <div class="stat-label">Ø Processing/min</div>
+        </div>
         <div class="stat-card">
             <div class="stat-value">{{ model }}</div>
             <div class="stat-label">Model</div>
@@ -78,9 +86,10 @@
                 <tr>
                     <th>Time</th>
                     <th>Endpoint</th>
-                    <th>Duration</th>
+                    <th>Audio Duration</th>
+                    <th>Processing Time</th>
+                    <th>Factor (s/min)</th>
                     <th>Status</th>
-                    <th>Processing</th>
                 </tr>
             </thead>
             <tbody>
@@ -95,12 +104,19 @@
                             -
                         {% endif %}
                     </td>
+                    <td>{{ "%.2f"|format(log.processing_time_ms / 1000) }}s</td>
+                    <td>
+                        {% if log.duration_seconds and log.duration_seconds > 0 %}
+                            {{ "%.2f"|format((log.processing_time_ms / 1000) / log.duration_seconds * 60) }}s
+                        {% else %}
+                            -
+                        {% endif %}
+                    </td>
                     <td>
                         <span class="badge badge-{{ 'success' if log.status == 'success' else 'danger' }}">
                             {{ log.status }}
                         </span>
                     </td>
-                    <td>{{ "%.2f"|format(log.processing_time_ms / 1000) }}s</td>
                 </tr>
                 {% endfor %}
             </tbody>