optimize shap response latency

backend/api/shap_routes.py

@@ -1,17 +1,31 @@
 from flask import Blueprint, jsonify, request
+import time
 
 from services.shap_service import shap_service
 
 shap_bp = Blueprint('shap', __name__, url_prefix='/api/shap')
 
 
+def log_shap(route, stage, extra=''):
+    message = f'[SHAP] route={route} stage={stage}'
+    if extra:
+        message = f'{message} {extra}'
+    print(message, flush=True)
+
+
 @shap_bp.route('/global', methods=['GET'])
 def get_global_importance():
+    started_at = time.time()
     try:
         model_type = request.args.get('model', 'random_forest')
+        log_shap('/global', 'start', f'model={model_type}')
         result = shap_service.get_global_importance(model_type)
+        elapsed = round(time.time() - started_at, 3)
+        log_shap('/global', 'success', f'model={model_type} elapsed={elapsed}s')
         return jsonify({'code': 200, 'message': 'success', 'data': result})
     except Exception as e:
+        elapsed = round(time.time() - started_at, 3)
+        log_shap('/global', 'error', f'elapsed={elapsed}s error={e}')
         return jsonify({'code': 500, 'message': str(e), 'data': None}), 500
 
 
@@ -30,21 +44,33 @@ def get_local_explanation():
 
 @shap_bp.route('/interaction', methods=['GET'])
 def get_interactions():
+    started_at = time.time()
     try:
         model_type = request.args.get('model', 'random_forest')
         top_n = int(request.args.get('top_n', 10))
+        log_shap('/interaction', 'start', f'model={model_type} top_n={top_n}')
         result = shap_service.get_interactions(model_type, top_n)
+        elapsed = round(time.time() - started_at, 3)
+        log_shap('/interaction', 'success', f'model={model_type} elapsed={elapsed}s')
         return jsonify({'code': 200, 'message': 'success', 'data': result})
     except Exception as e:
+        elapsed = round(time.time() - started_at, 3)
+        log_shap('/interaction', 'error', f'elapsed={elapsed}s error={e}')
         return jsonify({'code': 500, 'message': str(e), 'data': None}), 500
 
 
 @shap_bp.route('/dependence', methods=['GET'])
 def get_dependence():
+    started_at = time.time()
     try:
         feature = request.args.get('feature', '月均加班时长')
         model_type = request.args.get('model', 'random_forest')
+        log_shap('/dependence', 'start', f'model={model_type} feature={feature}')
         result = shap_service.get_dependence(feature, model_type)
+        elapsed = round(time.time() - started_at, 3)
+        log_shap('/dependence', 'success', f'model={model_type} elapsed={elapsed}s')
         return jsonify({'code': 200, 'message': 'success', 'data': result})
     except Exception as e:
+        elapsed = round(time.time() - started_at, 3)
+        log_shap('/dependence', 'error', f'elapsed={elapsed}s error={e}')
         return jsonify({'code': 500, 'message': str(e), 'data': None}), 500