Add concurrency to evaluator

metagpt/ext/spo/utils/evaluation_utils.py

@@ -49,9 +49,15 @@ class EvaluationUtils:
             succeed = True
         else:
             evaluation_results = []
-            for _ in range(EVALUATION_REPETITION):
-                result = await evaluator.prompt_evaluate(samples=samples, new_samples=new_samples)
-                evaluation_results.append(result)
+            
+            evaluation_results.extend(
+                await asyncio.gather(
+                    *(
+                        evaluator.prompt_evaluate(samples=samples, new_samples=new_samples)
+                        for _ in range(EVALUATION_REPETITION)
+                    )
+                )
+            )
 
             logger.info(f"Evaluation Results {evaluation_results}")