Move performance-calculation to persistence

freqtrade/rpc/rpc.py

@@ -442,18 +442,7 @@ class RPC:
         Handler for performance.
         Shows a performance statistic from finished trades
         """
-
-        pair_rates = Trade.session.query(Trade.pair,
-                                         sql.func.sum(Trade.close_profit).label('profit_sum'),
-                                         sql.func.count(Trade.pair).label('count')) \
-            .filter(Trade.is_open.is_(False)) \
-            .group_by(Trade.pair) \
-            .order_by(sql.text('profit_sum DESC')) \
-            .all()
-        return [
-            {'pair': pair, 'profit': round(rate * 100, 2), 'count': count}
-            for pair, rate, count in pair_rates
-        ]
+        return Trade.get_overall_performance()
 
     def _rpc_count(self) -> Dict[str, float]:
         """ Returns the number of trades running """