more warmup in performance XmlEditorTest

xml/tests/src/com/intellij/editor/XmlEditorTest.java

@@ -34,12 +34,14 @@ public class XmlEditorTest extends LightCodeInsightTestCase {
 
   public void testEnterPerformance() throws Exception {
     configureByFile(getTestFilePath(true));
-    EditorTestUtil.performTypingAction(myEditor, '\n');
+    for (int i = 0; i < 3; i++) {
+      EditorTestUtil.performTypingAction(myEditor, '\n');
+    }
     PlatformTestUtil.startPerformanceTest("Xml editor enter", 7500, () -> {
       for (int i = 0; i < 3; i ++) {
         EditorTestUtil.performTypingAction(myEditor, '\n');
       }
-    }).cpuBound().assertTiming();
+    }).cpuBound().attempts(1).assertTiming();
     checkResultByFile(getTestFilePath(false));
   }
 

xml/tests/testData/editor/enterPerformance_after.xml

@@ -19829,6 +19829,8 @@
       
       
       
+      
+      
       <caret>
     <string name="script" value=""/>
     <int name="flags" value="0"/>