diff --git a/lib/txt-to-sql.js b/lib/txt-to-sql.js
index b705848..5e96c70 100644
--- a/lib/txt-to-sql.js
+++ b/lib/txt-to-sql.js
@@ -631,21 +631,25 @@ function prepare(info) {
 }
 
 function initializeStats(info) {
-    info.stats = {};
+    info.stats = {
+        startTime:new Date().getTime()
+    };
     return info;
 }
 
 function finalizeStats(info) {
-    info.stats.rows = info.rows.length;
-    info.stats.columns = info.columnsInfo.length;
-    info.stats.textColumns = 0;
-    info.stats.nullColumns = 0;
-    info.stats.primaryKey = [];
+    var s = info.stats; // para no usar with
+    s.rows = info.rows.length;
+    s.columns = info.columnsInfo.length;
+    s.textColumns = 0;
+    s.nullColumns = 0;
+    s.primaryKey = [];
     info.columnsInfo.forEach(function(column, index) {
-        if(column.typeInfo.isTextColumn) { ++info.stats.textColumns; }
-        if(column.hasNullValues) { ++info.stats.nullColumns; }
-        if(column.inPrimaryKey) { info.stats.primaryKey.push(column.name); }
+        if(column.typeInfo.isTextColumn) { ++s.textColumns; }
+        if(column.hasNullValues) { ++s.nullColumns; }
+        if(column.inPrimaryKey) { s.primaryKey.push(column.name); }
     });
+    s.endTime = new Date().getTime();
     return info;
 }
 
diff --git a/test/test.js b/test/test.js
index 26fc9dc..d3cf722 100644
--- a/test/test.js
+++ b/test/test.js
@@ -122,7 +122,15 @@ describe("fixtures", function(){
                     expect(differences(generated.rawSql,expected.rawSql)).to.eql(null);
                     // coherencia entre prepared y generated
                     expect(generated.errors).to.eql(prepared.errors);
-                    if(expected.stats) { expect(generated.stats).to.eql(expected.stats); }
+                    if(expected.stats) {
+                        var stats = changing({},generated.stats);
+                        delete stats.startTime;
+                        delete stats.endTime;
+                        expect(stats).to.eql(expected.stats);
+                        expect(generated.stats.startTime).to.be.a('number');
+                        expect(generated.stats.endTime).to.be.a('number');
+                        //expect(generated.stats.endTime).to.be.greaterThan(generated.stats.startTime);
+                    }
                }).then(done,done);
             });   
         }
diff --git a/web/txt-to-sql.js b/web/txt-to-sql.js
index b705848..5e96c70 100644
--- a/web/txt-to-sql.js
+++ b/web/txt-to-sql.js
@@ -631,21 +631,25 @@ function prepare(info) {
 }
 
 function initializeStats(info) {
-    info.stats = {};
+    info.stats = {
+        startTime:new Date().getTime()
+    };
     return info;
 }
 
 function finalizeStats(info) {
-    info.stats.rows = info.rows.length;
-    info.stats.columns = info.columnsInfo.length;
-    info.stats.textColumns = 0;
-    info.stats.nullColumns = 0;
-    info.stats.primaryKey = [];
+    var s = info.stats; // para no usar with
+    s.rows = info.rows.length;
+    s.columns = info.columnsInfo.length;
+    s.textColumns = 0;
+    s.nullColumns = 0;
+    s.primaryKey = [];
     info.columnsInfo.forEach(function(column, index) {
-        if(column.typeInfo.isTextColumn) { ++info.stats.textColumns; }
-        if(column.hasNullValues) { ++info.stats.nullColumns; }
-        if(column.inPrimaryKey) { info.stats.primaryKey.push(column.name); }
+        if(column.typeInfo.isTextColumn) { ++s.textColumns; }
+        if(column.hasNullValues) { ++s.nullColumns; }
+        if(column.inPrimaryKey) { s.primaryKey.push(column.name); }
     });
+    s.endTime = new Date().getTime();
     return info;
 }