Reuse strings in StlPlayer.

DRAMSys/simulator/StlPlayer.h

@@ -75,7 +75,6 @@ public:
 
     void parseTraceFile()
     {
-        std::string line;
         unsigned parsedLines = 0;
         lineContents.clear();
         while (file && !file.eof() && parsedLines < 10000)
@@ -94,12 +93,13 @@ public:
             // Trace files MUST provide timestamp, command and address for every
             // transaction. The data information depends on the storage mode
             // configuration.
-            std::string time;
-            std::string command;
-            std::string address;
-            std::string dataStr;
+            time.clear();
+            command.clear();
+            address.clear();
+            dataStr.clear();
 
-            std::istringstream iss(line);
+            iss.clear();
+            iss.str(line);
 
             // Get the timestamp for the transaction.
             iss >> time;
@@ -213,6 +213,14 @@ private:
 
     std::vector<LineContent> lineContents;
     std::vector<LineContent>::const_iterator lineIterator;
+
+    std::string time;
+    std::string command;
+    std::string address;
+    std::string dataStr;
+
+    std::string line;
+    std::istringstream iss;
 };
 
 #endif // STLPLAYER_H