Index: src/__phutil_library_map__.php
===================================================================
--- src/__phutil_library_map__.php
+++ src/__phutil_library_map__.php
@@ -452,7 +452,6 @@
     'DifferentialRevisionMailReceiver' => 'applications/differential/mail/DifferentialRevisionMailReceiver.php',
     'DifferentialRevisionQuery' => 'applications/differential/query/DifferentialRevisionQuery.php',
     'DifferentialRevisionSearchEngine' => 'applications/differential/query/DifferentialRevisionSearchEngine.php',
-    'DifferentialRevisionStatsView' => 'applications/differential/view/DifferentialRevisionStatsView.php',
     'DifferentialRevisionStatus' => 'applications/differential/constants/DifferentialRevisionStatus.php',
     'DifferentialRevisionStatusFieldSpecification' => 'applications/differential/field/specification/DifferentialRevisionStatusFieldSpecification.php',
     'DifferentialRevisionUpdateHistoryView' => 'applications/differential/view/DifferentialRevisionUpdateHistoryView.php',
@@ -2972,7 +2971,6 @@
     'DifferentialRevisionMailReceiver' => 'PhabricatorObjectMailReceiver',
     'DifferentialRevisionQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'DifferentialRevisionSearchEngine' => 'PhabricatorApplicationSearchEngine',
-    'DifferentialRevisionStatsView' => 'AphrontView',
     'DifferentialRevisionStatusFieldSpecification' => 'DifferentialFieldSpecification',
     'DifferentialRevisionUpdateHistoryView' => 'AphrontView',
     'DifferentialRevisionViewController' => 'DifferentialController',
Index: src/applications/differential/view/DifferentialRevisionStatsView.php
===================================================================
--- src/applications/differential/view/DifferentialRevisionStatsView.php
+++ /dev/null
@@ -1,203 +0,0 @@
-<?php
-
-/**
- * Render some distracting statistics on revisions
- */
-final class DifferentialRevisionStatsView extends AphrontView {
-  private $comments;
-  private $revisions;
-  private $diffs;
-  private $filter;
-
-  public function setRevisions(array $revisions) {
-    assert_instances_of($revisions, 'DifferentialRevision');
-    $this->revisions = $revisions;
-    return $this;
-  }
-
-  public function setComments(array $comments) {
-    assert_instances_of($comments, 'DifferentialComment');
-    $this->comments = $comments;
-    return $this;
-  }
-
-  public function setDiffs(array $diffs) {
-    assert_instances_of($diffs, 'DifferentialDiff');
-    $this->diffs = $diffs;
-    return $this;
-  }
-
-  public function setFilter($filter) {
-    $this->filter = $filter;
-    return $this;
-  }
-
-  public function render() {
-    $user = $this->user;
-    if (!$user) {
-      throw new Exception("Call setUser() before render()!");
-    }
-
-    $id_to_revision_map = array();
-    foreach ($this->revisions as $rev) {
-      $id_to_revision_map[$rev->getID()] = $rev;
-    }
-    $revisions_seen = array();
-
-    $dates = array();
-    $counts = array();
-    $days_with_diffs = array();
-    $count_active = array();
-    $response_time = array();
-    $response_count = array();
-    $now = time();
-    $row_array = array();
-
-    foreach (array(
-               '1 week', '2 weeks', '3 weeks',
-               '1 month', '2 months', '3 months', '6 months', '9 months',
-               '1 year', '18 months',
-               '2 years', '3 years', '4 years', '5 years',
-             ) as $age) {
-      $dates[$age] = strtotime($age . ' ago 23:59:59');
-      $counts[$age] = 0;
-      $count_active[$age] = 0;
-      $response_time[$age] = array();
-    }
-
-    $revision_diffs_map = mgroup($this->diffs, 'getRevisionID');
-    foreach ($revision_diffs_map as $revision_id => $diffs) {
-      $revision_diffs_map[$revision_id] = msort($diffs, 'getID');
-    }
-
-    foreach ($this->comments as $comment) {
-      $comment_date = $comment->getDateCreated();
-
-      $day = phabricator_date($comment_date, $user);
-      $old_daycount = idx($days_with_diffs, $day, 0);
-      $days_with_diffs[$day] = $old_daycount + 1;
-
-      $rev_id = $comment->getRevisionID();
-
-      if (idx($revisions_seen, $rev_id)) {
-        $revision_seen = true;
-        $rev = null;
-      } else {
-        $revision_seen = false;
-        $rev = $id_to_revision_map[$rev_id];
-        $revisions_seen[$rev_id] = true;
-      }
-
-      foreach ($dates as $age => $cutoff) {
-        if ($cutoff >= $comment_date) {
-          continue;
-        }
-
-        if (!$revision_seen) {
-          $counts[$age]++;
-          if (!$old_daycount) {
-            $count_active[$age]++;
-          }
-        }
-
-        $diffs = $revision_diffs_map[$rev_id];
-        $target_diff = $this->findTargetDiff($diffs, $comment);
-        if ($target_diff) {
-          $response_time[$age][] =
-            $comment_date - $target_diff->getDateCreated();
-        }
-      }
-    }
-
-    $old_count = 0;
-    foreach (array_reverse($dates) as $age => $cutoff) {
-      $weeks = ceil(($now - $cutoff) / (60 * 60 * 24)) / 7;
-      if ($old_count == $counts[$age] && count($row_array) == 1) {
-        unset($dates[last_key($row_array)]);
-        $row_array = array();
-      }
-      $old_count = $counts[$age];
-
-      $row_array[$age] = array(
-        pht('Revisions per week') => number_format($counts[$age] / $weeks, 2),
-        pht('Active days per week') =>
-          number_format($count_active[$age] / $weeks, 1),
-        pht('Revisions') => number_format($counts[$age]),
-        pht('Active days') => number_format($count_active[$age]),
-      );
-
-      switch ($this->filter) {
-        case DifferentialAction::ACTION_CLOSE:
-        case DifferentialAction::ACTION_UPDATE:
-        case DifferentialAction::ACTION_COMMENT:
-          break;
-        case DifferentialAction::ACTION_ACCEPT:
-        case DifferentialAction::ACTION_REJECT:
-          $count = count($response_time[$age]);
-          if ($count) {
-            rsort($response_time[$age]);
-            $median = $response_time[$age][round($count / 2) - 1];
-            $average = array_sum($response_time[$age]) / $count;
-          } else {
-            $median = 0;
-            $average = 0;
-          }
-
-          $row_array[$age]['Response hours (median|average)'] =
-            number_format($median / 3600, 1).
-            ' | '.
-            number_format($average / 3600, 1);
-          break;
-      }
-    }
-
-    $rows = array();
-    $row_names = array_keys(head($row_array));
-    foreach ($row_names as $row_name) {
-      $rows[] = array($row_name);
-    }
-    foreach (array_keys($dates) as $age) {
-      $i = 0;
-      foreach ($row_names as $row_name) {
-        $rows[$i][] = idx(idx($row_array, $age), $row_name, '-');
-        ++$i;
-      }
-    }
-
-    $table = new AphrontTableView($rows);
-    $table->setColumnClasses(
-      array(
-        'wide pri',
-      ));
-
-    $table->setHeaders(
-      array_merge(
-        array(
-          'Metric',
-        ),
-        array_keys($dates)));
-
-    return $table->render();
-  }
-
-  private function findTargetDiff(array $diffs,
-                                         DifferentialComment $comment) {
-    switch ($this->filter) {
-      case DifferentialAction::ACTION_CLOSE:
-      case DifferentialAction::ACTION_UPDATE:
-      case DifferentialAction::ACTION_COMMENT:
-        return null;
-      case DifferentialAction::ACTION_ACCEPT:
-      case DifferentialAction::ACTION_REJECT:
-        $result = head($diffs);
-        foreach ($diffs as $diff) {
-          if ($diff->getDateCreated() >= $comment->getDateCreated()) {
-            break;
-          }
-          $result = $diff;
-        }
-
-        return $result;
-    }
-  }
-}