Cache result parser lookups

Author: brianc

lib/result.js

@@ -9,6 +9,7 @@ var Result = function() {
   this.oid = null;
   this.rows = [];
   this.fields = [];
+  this._parsers = [];
 };
 
 var matchRegexp = /([A-Za-z]+) ?(\d+ )?(\d+)?/;
@@ -46,7 +47,7 @@ Result.prototype.parseRow = function(rowData) {
     var fieldType = field.dataTypeID;
     var parsedValue = null;
     if(rawValue !== null) {
-      parsedValue = types.getTypeParser(fieldType, field.format || 'text')(rawValue);
+      parsedValue = this._parsers[i](rawValue);
     }
     var fieldName = field.name;
     row[fieldName] = parsedValue;
@@ -65,9 +66,12 @@ Result.prototype.addFields = function(fieldDescriptions) {
   //you need to reset the fields
   if(this.fields.length) {
     this.fields = [];
+    this._parsers = [];
   }
   for(var i = 0; i < fieldDescriptions.length; i++) {
-    this.fields.push(fieldDescriptions[i]);
+    var desc = fieldDescriptions[i];
+    this.fields.push(desc);
+    this._parsers.push(types.getTypeParser(desc.dataTypeID, desc.format || 'text'));
   }
 };