changed to multi threads

controller.py

@@ -34,6 +34,10 @@ matplotlib.use('Agg')
 # Initialize FastAPI app
 app = FastAPI()
 
+# Initialize the ProcessPoolExecutor
+max_cpus = os.cpu_count()
+print("Available CPUs:", max_cpus)
+
 # Ensure the cache directory exists
 os.makedirs("/app/cache", exist_ok=True)
 
@@ -579,8 +583,6 @@ def groq_chart(csv_url: str, question: str):
 current_langchain_chart_key_index = 0
 current_langchain_chart_lock = threading.Lock()
 
-max_cpus = os.cpu_count()
-print("Available CPUs:", max_cpus)
 
 # Use a process pool to run CPU-bound chart generation
 process_executor = ProcessPoolExecutor(max_workers=10)