diff --git a/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment.html b/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment.html
index 79b23ca815..88ec7209f0 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment.html
+++ b/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment.html
@@ -19,6 +19,7 @@ limitations under the License.
 <link rel="import" href="../../../behaviors/keyboard-shortcut-behavior/keyboard-shortcut-behavior.html">
 <link rel="import" href="../../../bower_components/iron-autogrow-textarea/iron-autogrow-textarea.html">
 <link rel="import" href="../../../styles/shared-styles.html">
+<link rel="import" href="../../core/gr-reporting/gr-reporting.html">
 <link rel="import" href="../../plugins/gr-endpoint-decorator/gr-endpoint-decorator.html">
 <link rel="import" href="../../plugins/gr-endpoint-param/gr-endpoint-param.html">
 <link rel="import" href="../../shared/gr-button/gr-button.html">
@@ -32,7 +33,6 @@ limitations under the License.
 <link rel="import" href="../../shared/gr-textarea/gr-textarea.html">
 <link rel="import" href="../../shared/gr-tooltip-content/gr-tooltip-content.html">
 <link rel="import" href="../gr-confirm-delete-comment-dialog/gr-confirm-delete-comment-dialog.html">
-
 <script src="../../../scripts/rootElement.js"></script>
 
 <dom-module id="gr-diff-comment">
@@ -387,6 +387,7 @@ limitations under the License.
     </template>
     <gr-rest-api-interface id="restAPI"></gr-rest-api-interface>
     <gr-storage id="storage"></gr-storage>
+    <gr-reporting id="reporting"></gr-reporting>
   </template>
   <script src="gr-diff-comment.js"></script>
 </dom-module>
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment.js b/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment.js
index 861201194d..b2b6b735a7 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment.js
@@ -27,6 +27,10 @@
   const SAVING_PROGRESS_MESSAGE = 'Saving draft...';
   const DiSCARDING_PROGRESS_MESSAGE = 'Discarding draft...';
 
+  const REPORT_CREATE_DRAFT = 'CreateDraftComment';
+  const REPORT_UPDATE_DRAFT = 'UpdateDraftComment';
+  const REPORT_DISCARD_DRAFT = 'DiscardDraftComment';
+
   Polymer({
     is: 'gr-diff-comment',
 
@@ -450,9 +454,12 @@
 
       // Ignore saves started while already saving.
       if (this.disabled) { return; }
-
+      const timingLabel = this.comment.id ?
+          REPORT_UPDATE_DRAFT : REPORT_CREATE_DRAFT;
+      this.$.reporting.time(timingLabel);
       this.set('comment.__editing', false);
-      this.save();
+      return this.save()
+          .then(() => { this.$.reporting.timeEnd(timingLabel); });
     },
 
     _handleCancel(e) {
@@ -485,8 +492,10 @@
 
     _handleConfirmDiscard(e) {
       e.preventDefault();
+      this.$.reporting.time(REPORT_DISCARD_DRAFT);
       this._closeConfirmDiscardOverlay();
-      this._discardDraft();
+      return this._discardDraft()
+          .then(() => { this.$.reporting.timeEnd(REPORT_DISCARD_DRAFT); });
     },
 
     _discardDraft() {
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment_test.html b/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment_test.html
index 5b4343063c..c7ca782b35 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment_test.html
+++ b/polygerrit-ui/app/elements/diff/gr-diff-comment/gr-diff-comment_test.html
@@ -279,6 +279,45 @@ limitations under the License.
         });
       });
     });
+
+    suite('draft update reporting', () => {
+      let timeEndStub;
+      let mockEvent;
+
+      setup(() => {
+        mockEvent = {preventDefault() {}};
+        sandbox.stub(element, 'save')
+            .returns(Promise.resolve({}));
+        sandbox.stub(element, '_discardDraft')
+            .returns(Promise.resolve({}));
+        timeEndStub = sandbox.stub(element.$.reporting, 'timeEnd');
+      });
+
+      test('create', () => {
+        element.comment = {};
+        return element._handleSave(mockEvent).then(() => {
+          assert.isTrue(timeEndStub.calledOnce);
+          assert.equal(timeEndStub.lastCall.args[0], 'CreateDraftComment');
+        });
+      });
+
+      test('update', () => {
+        element.comment = {id: 'abc_123'};
+        return element._handleSave(mockEvent).then(() => {
+          assert.isTrue(timeEndStub.calledOnce);
+          assert.equal(timeEndStub.lastCall.args[0], 'UpdateDraftComment');
+        });
+      });
+
+      test('discard', () => {
+        element.comment = {id: 'abc_123'};
+        sandbox.stub(element, '_closeConfirmDiscardOverlay');
+        return element._handleConfirmDiscard(mockEvent).then(() => {
+          assert.isTrue(timeEndStub.calledOnce);
+          assert.equal(timeEndStub.lastCall.args[0], 'DiscardDraftComment');
+        });
+      });
+    });
   });
 
   suite('gr-diff-comment draft tests', () => {
@@ -578,6 +617,7 @@ limitations under the License.
         assert.isTrue(stub.called);
         stub.restore();
         done();
+        return Promise.resolve();
       });
       element._messageText = 'is that the horse from horsing around??';
       element.editing = true;
@@ -654,7 +694,7 @@ limitations under the License.
     });
 
     test('draft prevent save when disabled', () => {
-      const saveStub = sandbox.stub(element, 'save');
+      const saveStub = sandbox.stub(element, 'save').returns(Promise.resolve());
       element.showActions = true;
       element.draft = true;
       MockInteractions.tap(element.$.header);
@@ -751,7 +791,7 @@ limitations under the License.
       });
 
       test('saving', () => {
-        element._saveDraft();
+        element._saveDraft({});
         assert.equal(element._savingMessage, 'Saving draft...');
       });