fix

paddle/fluid/framework/executor.h

@@ -60,6 +60,7 @@ class Executor {
   void Run(const ProgramDesc& prog, Scope* scope, int block_id,
            bool create_local_scope = true, bool create_vars = true);
 
+  // This API is very slow.
   void Run(const ProgramDesc& program, Scope* scope,
            std::map<std::string, const LoDTensor*>* feed_targets,
            std::map<std::string, LoDTensor*>* fetch_targets,
@@ -79,6 +80,7 @@ class Executor {
                           bool create_local_scope = true,
                           bool create_vars = true, bool keep_kids = false);
 
+  // This API is very slow.
   void RunPreparedContext(ExecutorPrepareContext* ctx, Scope* scope,
                           std::map<std::string, const LoDTensor*>* feed_targets,
                           std::map<std::string, LoDTensor*>* fetch_targets,

paddle/fluid/inference/api/analysis_predictor.cc

@@ -80,8 +80,7 @@ class AnalysisPredictor : public NativePaddlePredictor {
                                sub_scope_ ? sub_scope_ : scope_.get(), 0);
 
     // Get the feed_target_names and fetch_target_names
-    feed_target_names_ = inference_program_->GetFeedTargetNames();
-    fetch_target_names_ = inference_program_->GetFetchTargetNames();
+    PrepareFeedFetch();
     return true;
   }