diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -13,7 +13,7 @@
     'core.pkg.js' => '845355f4',
     'dark-console.pkg.js' => '187792c2',
     'differential.pkg.css' => '5c459f92',
-    'differential.pkg.js' => '256a327a',
+    'differential.pkg.js' => '24616785',
     'diffusion.pkg.css' => '42c75c37',
     'diffusion.pkg.js' => 'a98c0bf7',
     'maniphest.pkg.css' => '35995d6d',
@@ -381,7 +381,7 @@
     'rsrc/js/application/dashboard/behavior-dashboard-tab-panel.js' => '0116d3e8',
     'rsrc/js/application/diff/DiffChangeset.js' => '6e5e03d2',
     'rsrc/js/application/diff/DiffChangesetList.js' => 'b51ba93a',
-    'rsrc/js/application/diff/DiffInline.js' => '829b88bf',
+    'rsrc/js/application/diff/DiffInline.js' => '008b6a15',
     'rsrc/js/application/diff/DiffPathView.js' => '8207abf9',
     'rsrc/js/application/diff/DiffTreeView.js' => '5d83623b',
     'rsrc/js/application/differential/behavior-diff-radios.js' => '925fe8cd',
@@ -776,7 +776,7 @@
     'phabricator-dashboard-css' => '5a205b9d',
     'phabricator-diff-changeset' => '6e5e03d2',
     'phabricator-diff-changeset-list' => 'b51ba93a',
-    'phabricator-diff-inline' => '829b88bf',
+    'phabricator-diff-inline' => '008b6a15',
     'phabricator-diff-path-view' => '8207abf9',
     'phabricator-diff-tree-view' => '5d83623b',
     'phabricator-drag-and-drop-file-upload' => '4370900d',
@@ -917,6 +917,9 @@
     'unhandled-exception-css' => '9ecfc00d',
   ),
   'requires' => array(
+    '008b6a15' => array(
+      'javelin-dom',
+    ),
     '0116d3e8' => array(
       'javelin-behavior',
       'javelin-dom',
@@ -1639,9 +1642,6 @@
     '8207abf9' => array(
       'javelin-dom',
     ),
-    '829b88bf' => array(
-      'javelin-dom',
-    ),
     83754533 => array(
       'javelin-install',
       'javelin-util',
diff --git a/src/applications/differential/query/DifferentialDiffInlineCommentQuery.php b/src/applications/differential/query/DifferentialDiffInlineCommentQuery.php
--- a/src/applications/differential/query/DifferentialDiffInlineCommentQuery.php
+++ b/src/applications/differential/query/DifferentialDiffInlineCommentQuery.php
@@ -67,4 +67,78 @@
     return $id_map;
   }
 
+  protected function newInlineContextMap(array $inlines) {
+    $viewer = $this->getViewer();
+
+    $map = array();
+
+    foreach ($inlines as $key => $inline) {
+      $changeset = id(new DifferentialChangesetQuery())
+        ->setViewer($viewer)
+        ->withIDs(array($inline->getChangesetID()))
+        ->needHunks(true)
+        ->executeOne();
+      if (!$changeset) {
+        continue;
+      }
+
+      $hunks = $changeset->getHunks();
+
+      $is_simple =
+        (count($hunks) === 1) &&
+        ((int)head($hunks)->getOldOffset() <= 1) &&
+        ((int)head($hunks)->getNewOffset() <= 1);
+
+      if (!$is_simple) {
+        continue;
+      }
+
+      if ($inline->getIsNewFile()) {
+        $vector = $changeset->getNewStatePathVector();
+        $filename = last($vector);
+        $corpus = $changeset->makeNewFile();
+      } else {
+        $vector = $changeset->getOldStatePathVector();
+        $filename = last($vector);
+        $corpus = $changeset->makeOldFile();
+      }
+
+      $corpus = phutil_split_lines($corpus);
+
+      // Adjust the line number into a 0-based offset.
+      $offset = $inline->getLineNumber();
+      $offset = $offset - 1;
+
+      // Adjust the inclusive range length into a row count.
+      $length = $inline->getLineLength();
+      $length = $length + 1;
+
+      $head_min = max(0, $offset - 3);
+      $head_max = $offset;
+      $head_len = $head_max - $head_min;
+
+      if ($head_len) {
+        $head = array_slice($corpus, $head_min, $head_len, true);
+        $head = $this->simplifyContext($head, true);
+      } else {
+        $head = array();
+      }
+
+      $body = array_slice($corpus, $offset, $length, true);
+
+      $tail = array_slice($corpus, $offset + $length, 3, true);
+      $tail = $this->simplifyContext($tail, false);
+
+      $context = id(new PhabricatorDiffInlineCommentContext())
+        ->setFilename($filename)
+        ->setHeadLines($head)
+        ->setBodyLines($body)
+        ->setTailLines($tail);
+
+      $map[$key] = $context;
+    }
+
+    return $map;
+  }
+
 }
diff --git a/src/applications/diffusion/query/DiffusionDiffInlineCommentQuery.php b/src/applications/diffusion/query/DiffusionDiffInlineCommentQuery.php
--- a/src/applications/diffusion/query/DiffusionDiffInlineCommentQuery.php
+++ b/src/applications/diffusion/query/DiffusionDiffInlineCommentQuery.php
@@ -66,4 +66,8 @@
     return array();
   }
 
+  protected function newInlineContextMap(array $inlines) {
+    return array();
+  }
+
 }
diff --git a/src/infrastructure/diff/query/PhabricatorDiffInlineCommentQuery.php b/src/infrastructure/diff/query/PhabricatorDiffInlineCommentQuery.php
--- a/src/infrastructure/diff/query/PhabricatorDiffInlineCommentQuery.php
+++ b/src/infrastructure/diff/query/PhabricatorDiffInlineCommentQuery.php
@@ -18,6 +18,8 @@
     $viewer_phid,
     array $comments);
 
+  abstract protected function newInlineContextMap(array $inlines);
+
   final public function withFixedStates(array $states) {
     $this->fixedStates = $states;
     return $this;
@@ -265,72 +267,12 @@
         $need_context[] = $inline;
       }
 
-      foreach ($need_context as $inline) {
-        $changeset = id(new DifferentialChangesetQuery())
-          ->setViewer($viewer)
-          ->withIDs(array($inline->getChangesetID()))
-          ->needHunks(true)
-          ->executeOne();
-        if (!$changeset) {
-          $inline->attachInlineContext(null);
-          continue;
-        }
-
-        $hunks = $changeset->getHunks();
-
-        $is_simple =
-          (count($hunks) === 1) &&
-          ((int)head($hunks)->getOldOffset() <= 1) &&
-          ((int)head($hunks)->getNewOffset() <= 1);
-
-        if (!$is_simple) {
-          $inline->attachInlineContext(null);
-          continue;
-        }
-
-        if ($inline->getIsNewFile()) {
-          $vector = $changeset->getNewStatePathVector();
-          $filename = last($vector);
-          $corpus = $changeset->makeNewFile();
-        } else {
-          $vector = $changeset->getOldStatePathVector();
-          $filename = last($vector);
-          $corpus = $changeset->makeOldFile();
-        }
-
-        $corpus = phutil_split_lines($corpus);
-
-        // Adjust the line number into a 0-based offset.
-        $offset = $inline->getLineNumber();
-        $offset = $offset - 1;
-
-        // Adjust the inclusive range length into a row count.
-        $length = $inline->getLineLength();
-        $length = $length + 1;
+      if ($need_context) {
+        $context_map = $this->newInlineContextMap($need_context);
 
-        $head_min = max(0, $offset - 3);
-        $head_max = $offset;
-        $head_len = $head_max - $head_min;
-
-        if ($head_len) {
-          $head = array_slice($corpus, $head_min, $head_len, true);
-          $head = $this->simplifyContext($head, true);
-        } else {
-          $head = array();
+        foreach ($need_context as $key => $inline) {
+          $inline->attachInlineContext(idx($context_map, $key));
         }
-
-        $body = array_slice($corpus, $offset, $length, true);
-
-        $tail = array_slice($corpus, $offset + $length, 3, true);
-        $tail = $this->simplifyContext($tail, false);
-
-        $context = id(new PhabricatorDiffInlineCommentContext())
-          ->setFilename($filename)
-          ->setHeadLines($head)
-          ->setBodyLines($body)
-          ->setTailLines($tail);
-
-        $inline->attachInlineContext($context);
       }
 
     }
@@ -338,7 +280,7 @@
     return $inlines;
   }
 
-  private function simplifyContext(array $lines, $is_head) {
+  final protected function simplifyContext(array $lines, $is_head) {
     // We want to provide the smallest amount of context we can while still
     // being useful, since the actual code is visible nearby and showing a
     // ton of context is silly.
diff --git a/webroot/rsrc/js/application/diff/DiffInline.js b/webroot/rsrc/js/application/diff/DiffInline.js
--- a/webroot/rsrc/js/application/diff/DiffInline.js
+++ b/webroot/rsrc/js/application/diff/DiffInline.js
@@ -668,8 +668,6 @@
       this._editRow = this._drawRows(rows, null, 'edit');
 
       this._drawSuggestionState(this._editRow);
-      JX.log(this._originalState);
-
       this.setHasSuggestion(this._originalState.hasSuggestion);
     },