Add link to performance data

pkg/analysis_server/lib/src/get_handler.dart

Index: pkg/analysis_server/lib/src/get_handler.dart
diff --git a/pkg/analysis_server/lib/src/get_handler.dart b/pkg/analysis_server/lib/src/get_handler.dart
index 2770a3664cfe6e8047ed6c0ec7a2743f44c86607..2e2cb3ed4916fdf554e10c44a58ee24a61911c88 100644
--- a/pkg/analysis_server/lib/src/get_handler.dart
+++ b/pkg/analysis_server/lib/src/get_handler.dart
@@ -1414,6 +1414,12 @@ class GetHandler {
       buffer.write('Version: ');
       buffer.write(AnalysisServer.VERSION);
       buffer.write('</p>');
+
+      buffer.write('<p><b>Performance Data</b></p>');
+      buffer.write('<p>');
+      buffer.write(
+          _makeLink(PERFORMANCE_PATH, {}, 'Communication performance'));
+      buffer.write('</p>');
     }, (StringBuffer buffer) {
       _writeSubscriptionList(buffer, ServerService.VALUES, services);
     });