The test seem to run without errors. It now yields to other processes.

src/backtesting.py

@@ -3,6 +3,7 @@
 import logging
 import time
 import uuid
+import eventlet
 
 import backtrader as bt
 import datetime as dt
@@ -432,7 +433,7 @@ class Backtester:
                                        backtest_key, failure_results)
 
         # Start the backtest as a background task
-        self.socketio.start_background_task(execute_backtest)
+        eventlet.spawn(execute_backtest)
 
     def handle_backtest_message(self, user_id: str, msg_data: dict, socket_conn_id: str) -> dict:
         """

src/mapped_strategy.py

@@ -3,6 +3,8 @@
 import backtrader as bt
 import logging
 from typing import Dict
+
+import eventlet
 import pandas as pd
 
 from backtest_strategy_instance import BacktestStrategyInstance  # Ensure correct import path
@@ -117,6 +119,8 @@ class MappedStrategy(bt.Strategy):
         # Update progress
         if self.p.data_length:
             self.update_progress()
+        # Periodically yield to eventlet
+        eventlet.sleep(0)
 
     def execute_strategy(self):
         try:
@@ -139,4 +143,5 @@ class MappedStrategy(bt.Strategy):
                     {'reply': 'progress', 'data': {'progress': progress}},
                     room=self.p.socket_conn_id
                 )
+                logger.debug(f"Emitted progress: {progress}%")
             self.last_progress = progress