improve measurement of completion performance

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/dart/DartCompletionProcessor.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/dart/DartCompletionProcessor.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/dart/DartCompletionProcessor.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/dart/DartCompletionProcessor.java
index 90c4f02caba0e079934fb8845b5d8dbc825172b1..941b1bc342e9f685fd50250d6cad3d0fecf84529 100644
--- a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/dart/DartCompletionProcessor.java
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/dart/DartCompletionProcessor.java
@@ -155,7 +155,7 @@ public class DartCompletionProcessor extends ContentAssistProcessor {
     final boolean sortedProposals = collector.computeAndSortProposals();
 //    long delta = System.currentTimeMillis() - start;
 //    List<ICompletionProposal> proposals = collector.getProposals();
-//    System.out.println(">>> completion in ms: " + delta + " - "
+//    System.out.println(">>> completion " + start + " in ms: " + delta + " - "
 //        + (proposals != null ? proposals.size() : "no") + " suggestions" + (auto ? " [auto]" : ""));
     return sortedProposals;
   }